Dual-Hole-Transport-Layer-Facilitated Efficient Perovskite Light-Emitting Diode Ramesh Babu Yathirajula, Ritesh Kant Gupta, Mohammad Adil Afroz, Anwesha Choudhury, Himangshu Baishya, et al. Physica Status Solidi A Applications and Materials Science, 2023 The improved luminescence and colour purity of solution‐processable perovskite materials have positioned them as promising candidates for advanced lighting technologies. Herein, a simple method is presented for fabricating dual hole‐transport layers (HTLs) of green perovskite light‐emitting diodes (PeLEDs), for improved charge balance in the emissive layer (EML). With well‐matched energy levels, and lowered charge injection barrier of the transport layers, maximum radiative recombination in the EML can be obtained. The varying highest occupied molecular orbital (HOMO) levels of the HTLs used in the device are in alignment with the work function of the fluorine‐doped tin oxide and HOMO of the EML. The poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate)/N,N′‐bis(naphthalen‐1‐yl)‐N,N′‐bis(phenyl)‐2,2′‐dimethylbenzidine (PEDOT:PSS/NPD)‐based PeLED device shows outstanding performance with a maximum brightness of 19625 cd m−2, highest current efficiency of 19.2 cd A−1, and turn‐on voltage of 3.8 V among the all HTL combinations. These improvements are attributed to the well‐matched HOMO of NPD and PEDOT:PSS, with both the anode and EML allowing improved hole injection and charge balance. Electroluminescence supports the coordinates (0.22, 0.74) for pure green emission provided by the Commission Internationale de I’Eclairage. Perovskite films fabricated on top of PEDOT:PSS/NPD have the best film morphology and crystallinity with the fewest pinholes enabling improved charge transport.
Tailoring Trap Density of States through Impedance Analysis for Flexible Organic Field-Effect Transistors Anwesha Choudhury, Ritesh Kant Gupta, Rabindranath Garai, Parameswar Krishnan Iyer Advanced Materials Interfaces, 2021 The selection of dielectric material impacts the dielectric/semiconductor (D/S) interface which plays a significant role in defining the device performance. Hence, investigation of the D/S interfacial defects and trap states is essential for improving the device performance and designing new semiconductor and dielectric materials for organic field effect transistors (OFET). Here, the trap density of states (DOS) at the interface is investigated by impedance spectroscopy (IS). OFETs are fabricated with three different dielectric combinations and the highest mobility is found to be 0.12 cm2 V−1 s−1. Detailed analysis of the semiconductor thin film and the D/S interface is performed by atomic force microscopy, photoluminescence, time‐resolved photoluminescence and is found consistent with the DOS analysis. This work validates that IS can be utilized as a prospective DOS analysis method for OFET applications. Finally, for evaluating the potential application of the device architecture toward developing flexible electronic circuit components, the device is fabricated on a flexible substrate and the mechanical stability is examined by subjecting the device to a strain of 2.5%. The device shows no significant degradation in operation, confirming its practical utility.
An unconventional route to an ambipolar azaheterocycle and itsin situgenerated radical anion Sarasija Das, Anwesha Choudhury, Arnab Mandal, Chandan Kumar, Smruti Ranjan Sahoo, et al. Organic and Biomolecular Chemistry, 2021 FeCl3 mediated C–N coupling leads to an azaheterocycle, which undergoes one-electron reduction to form a fairly stable radical anion in situ. The azaheterocycle material showed balanced ambipolar charge transport in SCLC devices.
Functional materials for various organic electronic devices Ritesh Kant Gupta, Rahul Narasimhan Arunagirinathan, Mohammad Adil Afroz, Rabindranath Garai, Anwesha Choudhury, et al. Chemical Solution Synthesis for Materials Design and Thin Film Device Applications, 2021
Optimization of the window layer in CdTe solar cell Koushik Sarkar, Sanchari Mitra, Madhupi Das, Chandrika Mitra, Anwesha Choudhury, et al. 2017 4th International Conference on Opto Electronics and Applied Optics Optronix 2017, 2017
Simulation of high efficiency hybrid FTO/TiO2/CH3NH3SnI3/RGO based solar cell using SCAPS-1D TK Priya, P Deb, A Choudhury Optik 316, 172051 , 2024 2024 Citations: 7
Solution Processed Circuit Design for Flexible Opto electronic Logic Gates A Choudhury, RK Gupta, R Garai, PK Iyer IEEE Electron Device Letters , 2023 2023 Citations: 3
Engineering Semiconductor Layer Using Halonaphthalene Additives for Organic Opto-Inverter Circuits A Choudhury, RK Gupta, R Garai, PK Iyer ACS Applied Electronic Materials , 2022 2022 Citations: 1
Tuning Polymer Semiconductor Morphology through Additive Engineering for a Stable Phototransistor A Choudhury, RK Gupta, R Garai, PK Iyer ACS Applied Electronic Materials , 2021 2021 Citations: 8
Tailoring Trap Density of States through Impedance Analysis for Flexible Organic Field‐Effect Transistors A Choudhury, RK Gupta, R Garai, PK Iyer Advanced Materials Interfaces 8 (15), 2100574 , 2021 2021 Citations: 27
Halide Engineering for Mitigating Ion Migration and Defect States in Hot-Cast Perovskite Solar Cells RK Gupta, R Garai, M Hossain, A Choudhury, PK Iyer ACS Sustainable Chemistry & Engineering , 2021 2021 Citations: 30
An unconventional route to an ambipolar azaheterocycle and its in situ generated radical anion S Das, A Choudhury, A Mandal, C Kumar, SR Sahoo, A Bedi, ... Organic & Biomolecular Chemistry , 2021 2021 Citations: 5
Functional materials for various organic electronic devices RK Gupta, RN Arunagirinathan, MA Afroz, R Garai, A Choudhury, ... Chemical Solution Synthesis for Materials Design and Thin Film Device … , 2021 2021 Citations: 3
Wearable Sensing Devices for Point of Care Diagnostics S Mondal, N Zehra, A Choudhury, PK Iyer ACS Applied Bio Materials 4 (1), 47-70 , 2020 2020 Citations: 111
Constructing Fused Bis-isatins From Pyrroloindoles Using Direct Oxidation Approach and Re-visiting Indophenine Reaction VJ Bhanvadia, A Choudhury, PK Iyer, SS Zade, AL Patel Polymer, 123032 , 2020 2020 Citations: 6
Exploring Ambipolar Semiconductor Nature of Binary and Ternary Charge-Transfer Cocrystals of Triphenylene, Pyrene, and TCNQ A Mandal, A Choudhury, S Sau, PK Iyer, P Mal The Journal of Physical Chemistry C 124 (12), 6544-6553 , 2020 2020 Citations: 38
High-Performance Ambient-Condition-Processed Polymer Solar Cells and Organic Thin-Film Transistors R Garai, M Adil Afroz, RK Gupta, A Choudhury, PK Iyer ACS omega 5 (6), 2747-2754 , 2020 2020 Citations: 16
Exploring the semiconductor properties of a charge transfer cocrystal of 1-aminopyrene and TCNQ A Mandal, A Choudhury, R Kumar, PK Iyer, P Mal CrystEngComm 22 (4), 720-727 , 2020 2020 Citations: 31
Charge Transfer Versus Arene–Perfluoroarene Interactions in Modulation of Optical and Conductivity Properties in Cocrystals of 2,7-Di- tert -butylpyrene A Mandal, A Choudhury, PK Iyer, P Mal The Journal of Physical Chemistry C 123 (30), 18198-18206 , 2019 2019 Citations: 46
Morphology Control of Mixed Halide Perovskite for its Application in Low-cost Thin Film Transistor A Choudhury, P Dogra, B Teron, RK Gupta, A Dey, A Singh, R Garai, ... 2018 2nd IEEE International Conference on Power Electronics, Intelligent … , 2018 2018
Design and fabrication of CSRR based tunable mechanically and electrically efficient band pass filter for K-band application A Choudhury, S Maity AEU-International Journal of Electronics and Communications 72, 134-148 , 2017 2017 Citations: 22
RF MEMS based band-pass filter for K-band applications S Hore, S Maity, J Sarma, A Choudhury, G Yadav Advanced Computing and Communication Technologies, 369-375 , 2016 2016 Citations: 2
MOST CITED SCHOLAR PUBLICATIONS
Wearable Sensing Devices for Point of Care Diagnostics S Mondal, N Zehra, A Choudhury, PK Iyer ACS Applied Bio Materials 4 (1), 47-70 , 2020 2020 Citations: 111
Charge Transfer Versus Arene–Perfluoroarene Interactions in Modulation of Optical and Conductivity Properties in Cocrystals of 2,7-Di- tert -butylpyrene A Mandal, A Choudhury, PK Iyer, P Mal The Journal of Physical Chemistry C 123 (30), 18198-18206 , 2019 2019 Citations: 46
Exploring Ambipolar Semiconductor Nature of Binary and Ternary Charge-Transfer Cocrystals of Triphenylene, Pyrene, and TCNQ A Mandal, A Choudhury, S Sau, PK Iyer, P Mal The Journal of Physical Chemistry C 124 (12), 6544-6553 , 2020 2020 Citations: 38
Exploring the semiconductor properties of a charge transfer cocrystal of 1-aminopyrene and TCNQ A Mandal, A Choudhury, R Kumar, PK Iyer, P Mal CrystEngComm 22 (4), 720-727 , 2020 2020 Citations: 31
Halide Engineering for Mitigating Ion Migration and Defect States in Hot-Cast Perovskite Solar Cells RK Gupta, R Garai, M Hossain, A Choudhury, PK Iyer ACS Sustainable Chemistry & Engineering , 2021 2021 Citations: 30
Tailoring Trap Density of States through Impedance Analysis for Flexible Organic Field‐Effect Transistors A Choudhury, RK Gupta, R Garai, PK Iyer Advanced Materials Interfaces 8 (15), 2100574 , 2021 2021 Citations: 27
Design and fabrication of CSRR based tunable mechanically and electrically efficient band pass filter for K-band application A Choudhury, S Maity AEU-International Journal of Electronics and Communications 72, 134-148 , 2017 2017 Citations: 22
High-Performance Ambient-Condition-Processed Polymer Solar Cells and Organic Thin-Film Transistors R Garai, M Adil Afroz, RK Gupta, A Choudhury, PK Iyer ACS omega 5 (6), 2747-2754 , 2020 2020 Citations: 16
Tuning Polymer Semiconductor Morphology through Additive Engineering for a Stable Phototransistor A Choudhury, RK Gupta, R Garai, PK Iyer ACS Applied Electronic Materials , 2021 2021 Citations: 8
Simulation of high efficiency hybrid FTO/TiO2/CH3NH3SnI3/RGO based solar cell using SCAPS-1D TK Priya, P Deb, A Choudhury Optik 316, 172051 , 2024 2024 Citations: 7
Constructing Fused Bis-isatins From Pyrroloindoles Using Direct Oxidation Approach and Re-visiting Indophenine Reaction VJ Bhanvadia, A Choudhury, PK Iyer, SS Zade, AL Patel Polymer, 123032 , 2020 2020 Citations: 6
An unconventional route to an ambipolar azaheterocycle and its in situ generated radical anion S Das, A Choudhury, A Mandal, C Kumar, SR Sahoo, A Bedi, ... Organic & Biomolecular Chemistry , 2021 2021 Citations: 5
Solution Processed Circuit Design for Flexible Opto electronic Logic Gates A Choudhury, RK Gupta, R Garai, PK Iyer IEEE Electron Device Letters , 2023 2023 Citations: 3
Functional materials for various organic electronic devices RK Gupta, RN Arunagirinathan, MA Afroz, R Garai, A Choudhury, ... Chemical Solution Synthesis for Materials Design and Thin Film Device … , 2021 2021 Citations: 3
RF MEMS based band-pass filter for K-band applications S Hore, S Maity, J Sarma, A Choudhury, G Yadav Advanced Computing and Communication Technologies, 369-375 , 2016 2016 Citations: 2
Engineering Semiconductor Layer Using Halonaphthalene Additives for Organic Opto-Inverter Circuits A Choudhury, RK Gupta, R Garai, PK Iyer ACS Applied Electronic Materials , 2022 2022 Citations: 1
Morphology Control of Mixed Halide Perovskite for its Application in Low-cost Thin Film Transistor A Choudhury, P Dogra, B Teron, RK Gupta, A Dey, A Singh, R Garai, ... 2018 2nd IEEE International Conference on Power Electronics, Intelligent … , 2018 2018
