Sudipta Seth

@hofkenslab.com

Postdoctoral researcher at the Molecular Imaging and Photonics, Department of Chemistry, KU Leuven
Prof. Johan Hofkens



                    

https://researchid.co/sudiptaseth

RESEARCH, TEACHING, or OTHER INTERESTS

Spectroscopy, Physical and Theoretical Chemistry, Electronic, Optical and Magnetic Materials, Materials Chemistry

29

Scopus Publications

1781

Scholar Citations

15

Scholar h-index

20

Scholar i10-index

Scopus Publications

  • In Operando Locally-Resolved Photophysics in Perovskite Solar Cells by Correlation Clustering Imaging
    Boris Louis, Sudipta Seth, Qingzhi An, Ran Ji, Yana Vaynzof, Johan Hofkens, and Ivan G. Scheblykin
    Wiley
    AbstractThe instability of metal halide perovskites limits the commercialization of solar cells despite their impressive efficiencies. This instability, driven by photo‐induced ion migration, leads to material restructuring, defect formation, degradation, and defect healing. However, these same “unwanted” properties enable to propose Correlation Clustering Imaging (CLIM), a technique that detects local photoluminescence (PL) fluctuations through wide‐field fluorescence microscopy. It is shown that such fluctuations are present in high‐quality perovskites and their corresponding solar cells. CLIM successfully visualizes the polycrystalline grain structure in perovskite films, closely matching electron microscopy images. The analysis of fluctuations reveals a dominant metastable defect responsible for the fluctuations. In solar cells in short‐circuit conditions, these fluctuations are significantly larger, and corresponding correlated regions extend up to 10 micrometers, compared to 2 micrometers in films. It is proposed that the regions resolved by CLIM in solar cells possess a common pool of charge extraction channels, which fluctuate and cause PL to vary. Since PL fluctuations reflect non‐radiative recombination processes, CLIM provides valuable insights into the structural and functional dynamics of carrier transport, ion migration, defect behavior, and recombination losses. CLIM offers a non‐invasive approach to understanding luminescent materials and devices in operando, utilizing contrasts based on previously untapped properties.

  • Unveiling the Local Fate of Charge Carriers in Halide Perovskite Thin Films via Correlation Clustering Imaging
    Sudipta Seth, Boris Louis, Koki Asano, Toon Van Roy, Maarten B. J. Roeffaers, Elke Debroye, Ivan G. Scheblykin, Martin Vacha, and Johan Hofkens
    American Chemical Society (ACS)

  • Unconventional Optical Matter of Hybrid Metal-Dielectric Nanoparticles at Interfaces
    Boris Louis, Chih-Hao Huang, Marc Melendez, Ana Sánchez-Iglesias, Jorge Olmos-Trigo, Sudipta Seth, Susana Rocha, Rafael Delgado-Buscalioni, Luis M. Liz-Marzán, Manuel I. Marqués,et al.
    American Chemical Society (ACS)
    Optical matter, a transient arrangement formed by the interaction of light with micro/nanoscale objects, provides responsive and highly tunable materials that allow for controlling and manipulating light and/or matter. A combined experimental and theoretical exploration of optical matter is essential to advance our understanding of the phenomenon and potentially design applications. Most studies have focused on nanoparticles composed of a single material (either metallic or dielectric), representing two extreme regimes, one where the gradient force (dielectric) and one where the scattering force (metallic) dominates. To understand their role, it is important to investigate hybrid materials with different metallic-to-dielectric ratios. Here, we combine numerical calculations and experiments on hybrid metal-dielectric core-shell particles (200 nm gold spheres coated with silica shells with thicknesses ranging from 0 to 100 nm). We reveal how silica shell thickness critically influences the essential properties of optical binding, such as interparticle distance, reducing it below the anticipated optical binding length. Notably, for silica shells thicker than 50 nm, we observed a transition from a linear arrangement perpendicular to polarization to a hexagonal arrangement accompanied by a circular motion. Further, the dynamic swarming assembly changes from the conventional dumbbell-shaped to lobe-like morphologies. These phenomena, confirmed by both experimental observations and dynamic numerical calculations, demonstrate the complex dynamics of optical matter and underscore the potential for tuning its properties for applications.

  • Enhancing the X-ray Sensitivity of Cs<inf>2</inf>AgBiBr<inf>6</inf> Double Perovskite Single Crystals through Cation Engineering
    Donato Valli, Heng Zhang, Marián Betušiak, Giacomo Romolini, Arne Meulemans, Daniel Escudero, Sudipta Seth, Qing Zhao, Zonglong Zhu, Mischa Bonn,et al.
    American Chemical Society (ACS)

  • Amine-Free Multi-Faceted CsPbBr<inf>3</inf> Nanocrystals for Complete Suppression of Long-Lived Dark States
    N. V. S. Praneeth, Syed Akhil, Amitrajit Mukherjee, Sudipta Seth, Saumyakanti Khatua, and Nimai Mishra
    Wiley
    AbstractConventional amine‐capped perovskite nanocrystals (A‐PNCs) often show microscopic fluctuation (blinking) of photoluminescence (PL) between bright and near‐background (dark) states. The transient dark phases spanning milliseconds (ms) to several seconds timescale typically owe to the non‐radiative (NR) fate of charge carriers in crystal defect states, limiting the PNC's efficiency in optoelectronics. A PL study of a novel trioctylphosphine (TOP) capped rhombic cuboctahedron‐shaped amine‐free (AF) PNC is presented, demonstrating their fascinating nonblinking nature. While oleylamine‐capped hexahedron A‐PNCs as a reference system show long dark states, their population is completely suppressed in ≈90% of AF‐PNCs with random large‐amplitude PL fluctuations several times above the background. The PL trajectories of AF‐PNCs primarily comprise constant power spectral densities (PSDs) which are unprecedented and deviate from power‐law distribution as observed for A‐PNCs and most of the other blinking nanocrystals. Such signature of PSDs and frame‐by‐frame intensity jump analysis indicate a fast (&lt;&lt;ms) timescale charge‐carrier dynamics governing the PL emission of AF‐PNCs, likely involving short‐lived metastable states. Besides, long‐term stability and suppressed dark phases in ≈70% AF‐PNCs even 90 days after the synthesis is noteworthy. Altogether the study provides exceptional optical characteristics of photostable amine‐free PNCs which would be attractive to exploit in commercial display applications.

  • Photoluminescence Polarization of MAPbBr<inf>3</inf>Perovskite Nanostructures. Can the Dielectric Contrast Effect Explain It?
    Juanzi Shi, Igor Ryabov, Sudipta Seth, Pavel A. Frantsuzov, Safi Rafie-Zinedine, Andreas Walther, Maria E. Messing, Xiangang Wu, Wengao Lu, Haizheng Zhong,et al.
    American Chemical Society (ACS)

  • Are Shockley-Read-Hall and ABC models valid for lead halide perovskites?
    Alexander Kiligaridis, Pavel A. Frantsuzov, Aymen Yangui, Sudipta Seth, Jun Li, Qingzhi An, Yana Vaynzof, and Ivan G. Scheblykin
    Springer Science and Business Media LLC
    AbstractMetal halide perovskites are an important class of emerging semiconductors. Their charge carrier dynamics is poorly understood due to limited knowledge of defect physics and charge carrier recombination mechanisms. Nevertheless, classical ABC and Shockley-Read-Hall (SRH) models are ubiquitously applied to perovskites without considering their validity. Herein, an advanced technique mapping photoluminescence quantum yield (PLQY) as a function of both the excitation pulse energy and repetition frequency is developed and employed to examine the validity of these models. While ABC and SRH fail to explain the charge dynamics in a broad range of conditions, the addition of Auger recombination and trapping to the SRH model enables a quantitative fitting of PLQY maps and low-power PL decay kinetics, and extracting trap concentrations and efficacies. However, PL kinetics at high power are too fast and cannot be explained. The proposed PLQY mapping technique is ideal for a comprehensive testing of theories and applicable to any semiconductor.

  • Presence of Maximal Characteristic Time in Photoluminescence Blinking of MAPbI<inf>3</inf> Perovskite
    Sudipta Seth, Eduard A. Podshivaylov, Jun Li, Marina Gerhard, Alexander Kiligaridis, Pavel A. Frantsuzov, and Ivan G. Scheblykin
    Wiley
    AbstractPhotoluminescence (PL) blinking is a common phenomenon in nanostructured semiconductors associated with charge trapping and defect dynamics. PL blinking kinetics exhibit very broadly distributed timescales. The traditionally employed analysis of probability distribution of ON and OFF events suffers from ambiguities in their determination in complex PL traces making its suitability questionable. Here, the statistically correct power spectral density (PSD) estimation method applicable for fluctuations of any complexity is employed. PSDs of the blinking traces of submicrometer MAPbI3 crystals at high frequencies follow power law with excitation power density dependent parameters. However, at frequencies less than 0.3 Hz, the majority of the PSDs saturate revealing the presence of a maximal characteristic timescale of blinking in the range of 0.5–10 s independently of the excitation power density. Super‐resolution optical microscopy shows the characteristic timescale to be an inherent material property independent of polycrystallinity. Thus, for the first time the maximum timescale of the multiscale blinking behavior of nanoparticles is observed demonstrating that the power law statistics are not universal for semiconductors. It is proposed that the viscoelasticity of metal‐halide perovskites can limit the maximum timescale for the PL fluctuations by limiting the memory of preceded deformations/re‐arrangements of the crystal lattice.

  • Dark Excitons of the Perovskites and Sensitization of Molecular Triplets
    Navendu Mondal, Apurba De, Sudipta Seth, Tasnim Ahmed, Somnath Das, Sumanta Paul, Rajesh Kumar Gautam, and Anunay Samanta
    American Chemical Society (ACS)
    The recent emergence of metal halide perovskites as triplet sensitizers has generated new possibilities in optoelectronics, the exploitation of which requires an understanding of the characteristic...

  • Highly efficient energy transfer from a water soluble zinc silver indium sulphide quantum dot to organic J-aggregates
    Naupada Preeyanka, Himani Dey, Sudipta Seth, Abdur Rahaman, and Moloy Sarkar
    Royal Society of Chemistry (RSC)
    Highly efficient energy transfer from a water soluble quantum dot to organic J-aggregates in an inorganic–organic nanohybrid associate.

  • Highly Efficient Energy Transfer from Fluorescent Gold Nanoclusters to Organic J-Aggregates
    Somnath Banerjee, Naupada Preeyanka, Himani Dey, Sudipta Seth, Abdur Rahaman, and Moloy Sarkar
    American Chemical Society (ACS)
    With an aim to understand the interaction between the inorganic and organic components in inorganic–organic hybrid nanostructured materials, we have designed and developed an inorganic–organic nano...

  • Tackling the Defects, Stability, and Photoluminescence of CsPbX<inf>3</inf> Perovskite Nanocrystals
    Sudipta Seth, Tasnim Ahmed, Apurba De, and Anunay Samanta
    American Chemical Society (ACS)
    Defects have always been an integral part of semiconductor crystals, controlling their optical and electronic properties. Even though growing popularity of the CsPbX3 (X = Cl, Br, I, and their mixt...

  • Doping and Photon Induced Defect Healing of Hybrid Perovskite Thin Films: An Approach Towards Efficient Light Emitting Diodes
    Anil Kanwat, Won‐Chul Choi, Sudipta Seth, and Jin Jang
    Wiley
    AbstractHere, we demonstrate a simple method to improve photoluminescence and electroluminescent properties of MAPbBr3 perovskite thin films by monovalent Cs cation doping and treatment with UV light. It is known that the intermediate species of lead halides, which limits the photoluminescence quantum yield (PLQY) of perovskite thin films, are formed due to the presence of an organic polar solvent. In such cases, coalescence of nanocrystals is unavoidable when the thin‐films are thermally annealed to remove the intermediate phases and solvent residues. We find that PbBr2(DMSO)x complexes can effectively tune the morphology, grain boundary, PLQY, and non‐radiative loss of perovskite thin films under UV light irradiation. Upon UV exposure, highly uniform MA0.87Cs0.13PbBr3 ultra‐thin (45 nm) films with a full surface coverage of neatly packed nanocrystallites are obtained. When these films are integrated into electroluminescent devices, a current efficiency (CE) of 18.71 Cd/A and an external quantum efficiency (EQE) of 5.63% are observed for green perovskite‐based light emitting diodes (PeLEDs). These values of CE and EQE are respectively thirty‐four and forty‐three times higher than those achieved in pure MAPbBr3 based devices.

  • Electrostatically Driven Förster Resonance Energy Transfer between a Fluorescent Metal Nanoparticle and J-Aggregate in an Inorganic-Organic Nanohybrid Material
    Aman Kumar Agrawal, Prabhat Kumar Sahu, Sudipta Seth, and Moloy Sarkar
    American Chemical Society (ACS)
    With an objective to understand the interaction between the inorganic and organic components of inorganic–organic hybrid nanomaterials, we have fabricated and studied the photonic properties of a nanocomposite system consisting of a silver-capped gold nanoparticle as the inorganic component and the J-aggregate of cyanine-based dye (S2165) as the organic component. The present hybrid construct has been fabricated by adopting electrostatically driven self-assembly of organic cyanine dye and inorganic silver-capped gold (AgCAu) nanoparticle. In contrast to the previously developed hybrid systems where fluorescent inorganic semiconductor quantum dots are integrated with J-aggregates, the formation of the hybrid system in the present work is carried out by exploiting the fluorescent AgCAu nanoparticle and the J-aggregate of the cyanine dye. The hybrid system has been characterized by spectroscopic and microscopic techniques. Steady-state and time-resolved fluorescence measurements have been performed on this h...

  • Broadband ultrafast nonlinear optical studies revealing exciting multi-photon absorption coefficients in phase pure zero-dimensional Cs <inf>4</inf> PbBr <inf>6</inf> perovskite films
    K. N. Krishnakanth, Sudipta Seth, Anunay Samanta, and S. Venugopal Rao
    Royal Society of Chemistry (RSC)
    Lead halide perovskite nanocrystals have recently demonstrated promising nonlinear optical properties such as strong two-photon absorption, three-photon absorption, four-photon absorption and their respective cross-sections.

  • Mechanistic Investigation of the Defect Activity Contributing to the Photoluminescence Blinking of CsPbBr<inf>3</inf> Perovskite Nanocrystals
    Tasnim Ahmed, Sudipta Seth, and Anunay Samanta
    American Chemical Society (ACS)
    Exploration of the full potential of the perovskite nanocrystals (NCs) for different applications requires a thorough understanding of the pathways of recombination of the photo-generated charge carriers and associated dynamics. In this work, we have tracked the recombination routes of the charge carriers by probing photoluminescence (PL) intermittency of the immobilized and freely diffusing single CsPbBr3 NCs employing a time-tagged-time-resolved method. The immobilized single CsPbBr3 NCs show a complex PL time-trace, a careful analysis of which reveals nonradiative band-edge recombination through trap states, radiative and nonradiative trion recombination and trapping of the hot carriers contribute to the blinking behavior of any given NC. A drastically suppressed PL blinking observed for the NCs treated with a tetrafluoroborate salt indicates elimination of most of the undesired recombination processes. Fluorescence correlation spectroscopy (FCS) study on the freely diffusing single NCs shows that enhanced PL and suppressed blinking of the treated particles is the outcome of an increase in per-particle brightness, not due to any increase in the number of particles undergoing "off"-"on" transition in the observation volume. The mechanistic details obtained from this study on the orgin of blinking in CsPbBr3 NCs provide deep insight into the radiative and nonradiative charge carrier recombination pathways in these important materials and this knowledge is expected to be useful for better design and development of bright photoluminescent samples of this class for optoelectronic applications.

  • Photoluminescence Flickering and Blinking of Single CsPbBr <inf>3</inf> Perovskite Nanocrystals: Revealing Explicit Carrier Recombination Dynamics
    Sudipta Seth, Tasnim Ahmed, and Anunay Samanta
    American Chemical Society (ACS)
    To obtain an in-depth understanding of the dynamics and mechanism of carrier recombination in CsPbBr3 nanocrystals (NCs), we have investigated the photoluminescence (PL) of this material at the single-particle level using the time-tagged-time-resolved method. The study reveals two distinct types of PL fluctuations of the NCs, which are assigned to flickering and blinking. The flickering is found to be due to excess surface trap on the NCs, and the flickering single particles are transformed into blinking ones with significant enhancement of PL intensity and stability on postsynthetic surface treatment. Intensity-correlated lifetime analysis of the PL time trace reveals both trap-mediated nonradiative band-edge carrier recombination and positive trion recombination in single NCs. Dynamical and statistical analysis suggests a diffusive nature of the trap states to be responsible for the PL intermittency of the system. These findings throw light on the nature of the trap states, reveal the manifestation of these trap states in PL fluctuation, and provide an effective way to control the dynamics of CsPbBr3 NCs.

  • Striking Similarities in the Fluorescence Behavior between Carbon Dots and Ionic Liquids: Toward Understanding the Fluorescence Behavior of Carbon Dots
    Subhasis Roy, Naupada Preeyanka, Debashis Majhi, Sudipta Seth, and Moloy Sarkar
    American Chemical Society (ACS)
    Despite several studies, convincing explanation for the fluorescence of carbon dots (CDs) and its excitation wavelength dependence behavior has not yet emerged. It may be noted that direct structure–property correlation can be misleading based on solely transmission electron microscopy micrographs as it does not fully reveal the possibility of heterogeneous nature of the samples in a sense that it does not fully reveal the possibility of having both carbonaceous nanoparticles as well as small organic molecular-based systems. The present work is undertaken specifically to address this issue. A detailed spectroscopic investigation comprising steady-state absorption, emission, time-resolved fluorescence, and fluorescence correlation spectroscopy (FCS) studies has been carried out on CDs, synthesized from two different sources. Similar investigations have also been carried out on the systems such as aromatic and aliphatic ionic liquids (ILs), which are known to be fluorescent in their neat conditions. Interes...


  • Broadband femtosecond nonlinear optical properties of CsPbBr<inf>3</inf> perovskite nanocrystals
    Katturi Naga Krishnakanth, Sudipta Seth, Anunay Samanta, and Soma Venugopal Rao
    The Optical Society
    We report the broadband nonlinear optical (NLO) properties of CsPbBr3 perovskite films achieved from colloidal nanocrystals prepared following a room temperature and open atmosphere anti-solvent precipitation method. The NLO studies were performed on the films of nanocubes (NCs) and nanorods (NRs) using the Z-scan technique with 1 kHz femtosecond pulses at 600, 700, and 800 nm. Large two-photon absorption cross sections (∼105  GM) were retrieved by fitting the open-aperture Z-scan data. Strong third-order NLO susceptibility (∼10-10  esu) was observed in these films. At higher peak intensities a switching of sign (in both NCs and NRs) in the real and imaginary parts of the NLO susceptibility was observed from the studies on these CsPbBr3 nanocrystals. The obtained NLO coefficients clearly suggest that these materials are promising for ultrafast photonic applications.

  • Photoluminescence of Zero-Dimensional Perovskites and Perovskite-Related Materials
    Sudipta Seth and Anunay Samanta
    American Chemical Society (ACS)
    Zero-dimensional (0-D) perovskites and perovskite-related materials are an emerging class of optoelectronic materials exhibiting strong excitonic properties and, quite often, high photoluminescence (PL) in the solid state. Here we highlight two different classes of 0-D perovskites with contrasting structural and optical properties, focusing mainly on the less explored but rapidly growing bulk quantum materials termed as 0-D perovskite-related materials (0-D PRMs), whose PL properties are quite intriguing and a topic of recent debate. We attempt to present here a comprehensive picture to rationalize the contrasting properties of the 0-D PRMs and provide an understanding of the mechanism of exciton dynamics and PL of this class of materials. We hope that exciting PL and tunable composition of these systems will help design of new materials with versatile optical properties suited for practical applications.

  • Differences in the behavior of dicationic and monocationic ionic liquids as revealed by time resolved-fluorescence, NMR and fluorescence correlation spectroscopy
    Debashis Majhi, Sudipta Seth, and Moloy Sarkar
    Royal Society of Chemistry (RSC)
    Two imidazolium-based dicationic ionic liquids and one monocationic ionic liquid were investigated to understand their intermolecular interactions, structure and dynamics.

  • Fluorescent Phase-Pure Zero-Dimensional Perovskite-Related Cs<inf>4</inf>PbBr<inf>6</inf> Microdisks: Synthesis and Single-Particle Imaging Study
    Sudipta Seth and Anunay Samanta
    American Chemical Society (ACS)
    Quantum-confined perovskites are a new class of promising materials in optoelectronic applications. In this context, a zero-dimensional perovskite-related substance, Cs4PbBr6, having high exciton binding energy can be an important candidate, but its photoluminescence (PL) is a topic of recent debate. Herein, we report an ambient condition controlled synthesis of Cs4PbBr6 microdisks of different shapes and dimensions which exhibit fairly strong green PL (quantum yield up to 38%, band gap ∼2.43 eV) in the solid state. Using confocal fluorescence microscopy imaging of the single particles, we show that the fluorescence of Cs4PbBr6 microdisks is inherent to these particles. Fluorescence intensity and lifetime imaging of the microdisks reveals significant spatial heterogeneity with a bright central area and somewhat dimmer edges. This intensity and lifetime distribution is attributed to enhanced trap-mediated nonradiative deactivation at the edges compared to the central region of the microdisks. Our results, which unambiguously establish the PL of these Cs4PbBr6 and suggest its possible origin, brighten the potential of these materials in photon-emitting applications.

  • A facile methodology for engineering the morphology of CsPbX<inf>3</inf> perovskite nanocrystals under ambient condition
    Sudipta Seth and Anunay Samanta
    Springer Science and Business Media LLC
    AbstractA facile and highly reproducible room temperature, open atmosphere synthesis of cesium lead halide perovskite nanocrystals of six different morphologies is reported just by varying the solvent, ligand and reaction time. Sequential evolution of the quantum dots, nanoplates and nanobars in one medium and nanocubes, nanorods and nanowires in another medium is demonstrated. These perovskite nanoparticles are shown to be of excellent crystalline quality with high fluorescence quantum yield. A mechanism of the formation of nanoparticles of different shapes and sizes is proposed. Considering the key role of morphology in nanotechnology, this simple method of fabrication of a wide range of high quality nanocrystals of different shapes and sizes of all-inorganic lead halide perovskites, whose potential is already demonstrated in light emitting and photovoltaic applications, is likely to help widening the scope and utility of these materials in optoelectronic devices.


RECENT SCHOLAR PUBLICATIONS

  • Unveiling the Local Fate of Charge Carriers in Halide Perovskite Thin Films via Correlation Clustering Imaging
    S Seth, B Louis, K Asano, T Van Roy, MBJ Roeffaers, E Debroye, ...
    Chemical & Biomedical Imaging 2025

  • In Operando Locally‐Resolved Photophysics in Perovskite Solar Cells by Correlation Clustering Imaging
    B Louis, S Seth, Q An, R Ji, Y Vaynzof, J Hofkens, IG Scheblykin
    Advanced Materials 37 (7), 2413126 2025

  • Unconventional Optical Matter of Hybrid Metal–Dielectric Nanoparticles at Interfaces
    B Louis, CH Huang, M Melendez, A Snchez-Iglesias, J Olmos-Trigo, ...
    ACS nano 18 (47), 32746-32758 2024

  • Enhancing the X-ray Sensitivity of Cs2AgBiBr6 Double Perovskite Single Crystals through Cation Engineering
    D Valli, H Zhang, M Betušiak, G Romolini, A Meulemans, D Escudero, ...
    ACS Applied Optical Materials 2 (10), 2075-2084 2024

  • High resolution imaging of non-equilibrium colloidal self-assembly enabled by photopolymerization
    J Satpathy, JK Chen, G Wen, H Masuhara, S Seth, V Leen, S Rocha, ...
     2024

  • Machine Learning for Microscopy Data Analysis: Toward Real-time Optical and Electrical Characterization of Sub-micron Materials
    A Mukherjee, R Reynaerts, B Pradhan, S Seth, AT Rsch, T Banerjee, ...
     2024

  • Amine‐Free Multi‐Faceted CsPbBr3 Nanocrystals for Complete Suppression of Long‐Lived Dark States
    NVS Praneeth, S Akhil, A Mukherjee, S Seth, S Khatua, N Mishra
    Advanced Optical Materials 12 (16), 2303222 2024

  • Correlation Clustering Imaging: A method for Functional Mapping of Semiconductor materials and photovoltaic devices in operando
    B Louis, S Seth, Q An, R Ji, Y Vaynzof, J Hofkens, I Scheblykin
     2024

  • Photoluminescence Polarization of MAPbBr3 Perovskite Nanostructures. Can the Dielectric Contrast Effect Explain It?
    J Shi, I Ryabov, S Seth, PA Frantsuzov, S Rafie-Zinedine, A Walther, ...
    ACS Photonics 9 (12), 3888-3898 2022

  • Presence of Maximal Characteristic Time in Photoluminescence Blinking of MAPbI3 Perovskite
    EA Podshivaylov, S Seth, J Li, M Gerhard, A Kiligaridis, IG Scheblykin, ...
    Physics and Chemistry of Elementary Chemical Processes, 42-42 2022

  • Presence of Maximal Characteristic Time in Photoluminescence Blinking of MAPbI3 Perovskite
    S Seth, EA Podshivaylov, J Li, M Gerhard, A Kiligaridis, PA Frantsuzov, ...
    Advanced Energy Materials 11 (44), 2102449 2021

  • Are Shockley-Read-Hall and ABC models valid for lead halide perovskites?
    A Kiligaridis, PA Frantsuzov, A Yangui, S Seth, J Li, Q An, Y Vaynzof, ...
    Nature communications 12 (1), 3329 2021

  • Dark excitons of the perovskites and sensitization of molecular triplets
    N Mondal, A De, S Seth, T Ahmed, S Das, S Paul, RK Gautam, A Samanta
    ACS Energy Letters 6 (2), 588-597 2021

  • Highly efficient energy transfer from fluorescent gold nanoclusters to organic j-aggregates
    S Banerjee, N Preeyanka, H Dey, S Seth, A Rahaman, M Sarkar
    The Journal of Physical Chemistry C 124 (9), 5009-5020 2020

  • Highly efficient energy transfer from a water soluble zinc silver indium sulphide quantum dot to organic J-aggregates
    N Preeyanka, H Dey, S Seth, A Rahaman, M Sarkar
    Physical Chemistry Chemical Physics 22 (22), 12772-12784 2020

  • Mechanistic Investigation of the Defect Activity Contributing to the Photoluminescence Blinking of CsPbBr3 Perovskite Nanocrystals
    T Ahmed, S Seth, A Samanta
    ACS nano 13 (11), 13537-13544 2019

  • Tackling the Defects, Stability, and Photoluminescence of CsPbX3 Perovskite Nanocrystals
    S Seth, T Ahmed, A De, A Samanta
    ACS Energy Letters 4 (7), 1610-1618 2019

  • Doping and photon induced defect healing of hybrid perovskite thin films: an approach towards efficient light emitting diodes
    A Kanwat, WC Choi, S Seth, J Jang
    ChemNanoMat 5 (5), 666-673 2019

  • Electrostatically Driven Förster Resonance Energy Transfer between a Fluorescent Metal Nanoparticle and J-Aggregate in an Inorganic–Organic Nanohybrid Material
    AK Agrawal, PK Sahu, S Seth, M Sarkar
    The Journal of Physical Chemistry C 123 (6), 3836-3847 2019

  • Energy transfer from ZAIS QDs to cyanine DYE (J-aggregates): a good light harvesting system
    N Preeyanka, H Dey, A Rahaman, M Sarkar, S Seth
    Proceedings of the fifteenth DAE-BRNS biennial Trombay symposium on 2019

MOST CITED SCHOLAR PUBLICATIONS

  • Boosting the Photoluminescence of CsPbX3 (X = Cl, Br, I) Perovskite Nanocrystals Covering a Wide Wavelength Range by Postsynthetic Treatment with
    T Ahmed, S Seth, A Samanta
    Chemistry of Materials 30 (11), 3633-3637 2018
    Citations: 294

  • Tackling the Defects, Stability, and Photoluminescence of CsPbX3 Perovskite Nanocrystals
    S Seth, T Ahmed, A De, A Samanta
    ACS Energy Letters 4 (7), 1610-1618 2019
    Citations: 288

  • Fluorescence Blinking and Photoactivation of All-Inorganic Perovskite Nanocrystals CsPbBr3 and CsPbBr2I
    S Seth, N Mondal, S Patra, A Samanta
    The journal of physical chemistry letters 7 (2), 266-271 2016
    Citations: 175

  • A Facile Methodology for Engineering the Morphology of CsPbX3 Perovskite Nanocrystals under Ambient Condition
    S Seth, A Samanta
    Scientific reports 6 (1), 37693 2016
    Citations: 170

  • Fluorescent Phase-Pure Zero-Dimensional Perovskite-Related Cs4PbBr6 Microdisks: Synthesis and Single-Particle Imaging Study
    S Seth, A Samanta
    The Journal of Physical Chemistry Letters 8 (18), 4461-4467 2017
    Citations: 152

  • Photoluminescence of zero-dimensional perovskites and perovskite-related materials
    S Seth, A Samanta
    The Journal of Physical Chemistry Letters 9 (1), 176-183 2018
    Citations: 110

  • Broadband femtosecond nonlinear optical properties of CsPbBr3 perovskite nanocrystals
    KN Krishnakanth, S Seth, A Samanta, SV Rao
    Optics Letters 43 (3), 603-606 2018
    Citations: 89

  • Broadband ultrafast nonlinear optical studies revealing exciting multi-photon absorption coefficients in phase pure zero-dimensional Cs 4 PbBr 6 perovskite films
    KN Krishnakanth, S Seth, A Samanta, SV Rao
    Nanoscale 11 (3), 945-954 2019
    Citations: 85

  • Are Shockley-Read-Hall and ABC models valid for lead halide perovskites?
    A Kiligaridis, PA Frantsuzov, A Yangui, S Seth, J Li, Q An, Y Vaynzof, ...
    Nature communications 12 (1), 3329 2021
    Citations: 82

  • Photoluminescence Flickering and Blinking of Single CsPbBr3 Perovskite Nanocrystals: Revealing Explicit Carrier Recombination Dynamics
    S Seth, T Ahmed, A Samanta
    The Journal of Physical Chemistry Letters 9 (24), 7007-7014 2018
    Citations: 76

  • Mechanistic Investigation of the Defect Activity Contributing to the Photoluminescence Blinking of CsPbBr3 Perovskite Nanocrystals
    T Ahmed, S Seth, A Samanta
    ACS nano 13 (11), 13537-13544 2019
    Citations: 70

  • Dark excitons of the perovskites and sensitization of molecular triplets
    N Mondal, A De, S Seth, T Ahmed, S Das, S Paul, RK Gautam, A Samanta
    ACS Energy Letters 6 (2), 588-597 2021
    Citations: 26

  • Differences in the behavior of dicationic and monocationic ionic liquids as revealed by time resolved-fluorescence, NMR and fluorescence correlation spectroscopy
    D Majhi, S Seth, M Sarkar
    Physical Chemistry Chemical Physics 20 (11), 7844-7856 2018
    Citations: 26

  • ACS Energy Lett. 2019, 4, 1610; c) H. Huang, MI Bodnarchuk, S. V. Kershaw, MV Kovalenko, AL Rogach
    S Seth, T Ahmed, A De, A Samanta
    ACS Energy Lett 2, 2071 2017
    Citations: 19

  • Presence of Maximal Characteristic Time in Photoluminescence Blinking of MAPbI3 Perovskite
    S Seth, EA Podshivaylov, J Li, M Gerhard, A Kiligaridis, PA Frantsuzov, ...
    Advanced Energy Materials 11 (44), 2102449 2021
    Citations: 16

  • Electrostatically Driven Förster Resonance Energy Transfer between a Fluorescent Metal Nanoparticle and J-Aggregate in an Inorganic–Organic Nanohybrid Material
    AK Agrawal, PK Sahu, S Seth, M Sarkar
    The Journal of Physical Chemistry C 123 (6), 3836-3847 2019
    Citations: 15

  • Highly efficient energy transfer from a water soluble zinc silver indium sulphide quantum dot to organic J-aggregates
    N Preeyanka, H Dey, S Seth, A Rahaman, M Sarkar
    Physical Chemistry Chemical Physics 22 (22), 12772-12784 2020
    Citations: 13

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