Sagar Bhattarai

Verified @gmail.com

Assistant Professor and HoD, Department of Physics
Arunachal University of Studies

Dr. Sagar Bhattarai was born in T.K. Grant (North Guwahati). He is an expert in optoelectronic devices. His research area is Organic Solar Cells, Perovskite Solar Cells, OLED, and III-V semiconductors. He has published more than 20 research papers in various international and national journals till now. He is currently working as an Assistant Professor of Physics at Arunachal University of Studies, Namsai, Arunachal Pradesh (India).

EDUCATION

PhD in Physics

RESEARCH INTERESTS

Condensed Matter Physis, Computational Physics, III-V Semiconductor

FUTURE PROJECTS

Perovskite solar cells

Researchers worldwide have been interested in perovskite solar cells (PSCs) due to their exceptional photovoltaic (PV) performance. The PSCs are the next generation of the PV market as they can produce power with performance that is on par with the best silicon solar cells while costing less than silicon solar cells. The efficiency of PSCs has increased from 3.81% to 25.7% within a decade, demonstrating their immense potential. In this review, the advantages of PSCs and the evolution of efficiency with various configuration are summarized and discussed. The manufacture of PSCs on a large scale and the fabrication of perovskite films are described as well. Despite their advantages, PSCs have encountered numerous problems, including toxicity and degradation in the presence of moisture, oxygen, and UV light. Thus, we emphasize this line added to the difficulties preventing the commercialization of PSCs, as well as the road map towards commercialization are thoroughly examined.


Applications Invited

Renewable Energy


Applications Invited

Tandem solar cell, Quantum Dot solar cell


Applications Invited
100

Scopus Publications

2164

Scholar Citations

25

Scholar h-index

50

Scholar i10-index

Scopus Publications

RECENT SCHOLAR PUBLICATIONS

  • Density functional theory based computation of the optoelectronic properties of double perovskites A2InAgBr6 (A= Na, Cs, Rb, and K) and their performance assessment as absorber
    G Kumar, BK Ravidas, S Bhattarai, MK Roy, DP Samajdar
    Materials Science in Semiconductor Processing 190, 109269 2025

  • A review on perovskite materials for photovoltaic applications
    L Sanga, C Lalengmawia, Z Renthlei, ST Chanu, L Hima, NS Singh, ...
    Next Materials 7, 100494 2025

  • Recent progress in microcrystalline cellulose for solar cell applications: a comprehensive review
    J Poudel, S Bhattarai, A Tara, MF Rahman, N Nath, B Tanti
    Journal of Optics, 1-15 2025

  • High-efficiency GaAs solar cells with ordered nano-conical frustum arrays for enhanced light trapping and photovoltaic performance
    S Sagar, S Bhattarai, J Kumar, A Kumar, S Mukhopadhyay
    Solar Energy 288, 113299 2025

  • A Simulation Investigation of Lead-Free Inorganic CsGeI3-Based Perovskite for Solar Cell with Hole Transport Layers of Different Organic Materials via SCAPS-1D
    A Das, BK Ravidas, S Bhattarai, R Pandey, J Madan, MK Hossain, ...
    Nanomaterials for Sensors and Sustainable Energy Volume 1, 123-152 2025

  • Introducing a sustainable strontium-based double perovskite solar cell exceeding 32% efficiency for advanced solar technology
    B Sultana, A Bakkar, O Saidani, S Bhattarai, A Irfan, MF Rahman
    Journal of Physics and Chemistry of Solids, 112582 2025

  • Investigation of Dual Absorbers with Novel MXene doped Perovskite for Extraordinary Performance of Perovskite Solar Cells
    S Bhattarai, KD Jayan, P Kanjariya, P Sharma, R Kaur, J Madan, ...
    Journal of Physics and Chemistry of Solids, 112643 2025

  • Exploring the landscape of deep learning for solar photovoltaic power output forecasting: A review
    DK Dhaked, VL Narayanan, R Gopal, O Sharma, S Bhattarai, SK Dwivedy
    Renewable Energy Focus, 100682 2025

  • Achieving Quasi-Fermi level splitting near its radiative limit in efficient and stable 2D/3D perovskite solar Cells: Detailed balance model
    Q Aouni, S Kouda, KM Batoo, MF Ijaz, GS Sahoo, S Bhattarai, ...
    Solar Energy 286, 113144 2025

  • Observation of voltage dependent negative differential resistance (NDR) in SnS2-GO nanocomposites
    L Tangjang, AP Gogoi, H Das, S Bhattarai, PK Kalita
    Physica E: Low-dimensional Systems and Nanostructures 165, 116102 2025

  • Integration of SCAPS-1D and density functional theory for the performance evaluation of RbGeI3-based perovskite solar cell
    BK Ravidas, AR Kumar, A Praveen, SK Agnihotri, S Bhattarai, R Pandey, ...
    Journal of Physics and Chemistry of Solids 196, 112325 2025

  • A Parametric Analysis of CZTS/CdTe Heterostructure Solar Cell Based on SCAPS 1D
    PK Dakua, NN Kumar, S Ganesan, JA Hamid, MR Kumar, S Saini, ...
    Journal of Electronic Materials, 1-10 2024

  • Assessment of double CdS/CdTe based solar cells using carbon as back contact: an exclusive optimization method
    S Bhattarai, AA Jrai, J Kaur, JA Hamid, PK Dakua, J Madan, R Pandey
    Journal of Optics, 1-12 2024

  • All Inorganic Cesium-Based Dual Light Absorber For Efficiency Enhancement In Solar Cells
    S Bhattarai, P Kanjariya, KS Kiran, R Sharma, S Jaidka, N Shrivastav, ...
    Journal of Optics, 1-10 2024

  • Modeling organic electron transport layers in mixed cation tin-based perovskite solar cells
    A Tara, A Paul, A Singha, S Gohri, J Madan, R Pandey, P Kumar, ...
    Journal of Nanoparticle Research 26 (12), 1-12 2024

  • Bio-synthesized ZnO in cesium based perovskite solar cells: a pathway to sustainable high efficiency
    S Bhattarai, MKA Mohammed, I Hossain, PK Dakua, R Pandey, J Madan
    Solid State Communications 393, 115671 2024

  • DFT and SCAPS-1D based optimization study of double perovskite Cs2AuBiCl6 solar cells utilizing different charge transport layers
    OR Lunge, BK Ravidas, S Bhattarai, R Pandey, J Madan, MK Roy, ...
    Journal of Physics and Chemistry of Solids 195, 112260 2024

  • Systematic Optimization of InBi2S4Cl Absorber Layer in Perovskite Solar Cells for Enhanced Photovoltaic Performance
    N Shrivastav, S Bhattarai, J Madan, H Alabdeli, R Pandey
    2024 IEEE International Conference of Electron Devices Society Kolkata 2024

  • Enhancing efficiency in organic solar device with exclusive study using PC-1D simulator
    A Sharma, S Ghosh, B Kalita, A Kashyap, A Kumar, J Kaur, M Akkur, ...
    Journal of Optics, 1-8 2024

  • Facile synthesis of chitosan-MoS2 over reduced graphene oxide to improve photocatalytic degradation of methylene blue
    MKA Mohammed, AM Naji, DS Ahmed, MJ Jamai, EY Salih, ...
    Journal of Sol-Gel Science and Technology, 1-11 2024

MOST CITED SCHOLAR PUBLICATIONS

  • Numerical Analysis in DFT and SCAPS-1D on the Influence of Different Charge Transport Layers of CsPbBr3 Perovskite Solar Cells
    MK Hossain, MKA Mohammed, R Pandey, AA Arnab, MHK Rubel, ...
    Energy & Fuels 37 (8), 6078-6098 2023
    Citations: 160

  • Optimization of carrier transport materials for the performance enhancement of the MAGeI3 based perovskite solar cell
    S Bhattarai, TD Das
    Solar Energy 217, 200-207 2021
    Citations: 102

  • Halide composition engineered a non-toxic perovskite–silicon tandem solar cell with 30.7% conversion efficiency
    R Pandey, S Bhattarai, K Sharma, J Madan, AK Al-Mousoi, ...
    ACS Applied Electronic Materials 5 (10), 5303-5315 2023
    Citations: 100

  • Photovoltaic Performance Investigation of Cs3Bi2I9-Based Perovskite Solar Cells with Various Charge Transport Channels Using DFT and SCAPS-1D Frameworks
    MK Hossain, GF Ishraque Toki, DP Samajdar, MHK Rubel, M Mushtaq, ...
    Energy & Fuels 37 (10), 7380-7400 2023
    Citations: 98

  • Harnessing the potential of CsPbBr 3-based perovskite solar cells using efficient charge transport materials and global optimization
    MK Hossain, S Bhattarai, AA Arnab, MKA Mohammed, R Pandey, MH Ali, ...
    RSC advances 13 (30), 21044-21062 2023
    Citations: 92

  • Achieving above 24% efficiency with non-toxic CsSnI 3 perovskite solar cells by harnessing the potential of the absorber and charge transport layers
    MK Hossain, MS Uddin, GFI Toki, MKA Mohammed, R Pandey, J Madan, ...
    RSC advances 13 (34), 23514-23537 2023
    Citations: 81

  • Optimization of the architecture of lead-free CsSnCl3-perovskite solar cells for enhancement of efficiency: a combination of SCAPS-1D and wxAMPS study
    MK Hossain, GFI Toki, A Kuddus, MKA Mohammed, R Pandey, J Madan, ...
    Materials Chemistry and Physics 308, 128281 2023
    Citations: 78

  • Design Insights into La2NiMnO6-Based Perovskite Solar Cells Employing Different Charge Transport Layers: DFT and SCAPS-1D Frameworks
    MK Hossain, AA Arnab, DP Samajdar, MHK Rubel, MM Hossain, ...
    Energy & Fuels 37 (17), 13377-13396 2023
    Citations: 73

  • Investigation of Carrier Transport Materials for Performance Assessment of Lead-Free Perovskite Solar Cells
    S Bhattarai, R Pandey, J Madan, A Mhamdi, A Bouazizi, D Muchahary, ...
    IEEE Transactions on Electron Devices 2022 (0018-9383), 1-8 2022
    Citations: 72

  • A comprehensive study of the optimization and comparison of cesium halide perovskite solar cells using ZnO and Cu 2 FeSnS 4 as charge transport layers
    MK Hossain, GFI Toki, J Madan, R Pandey, H Bencherif, MKA Mohammed, ...
    New Journal of Chemistry 47 (18), 8602-8624 2023
    Citations: 71

  • A detailed review of perovskite solar cells: Introduction, working principle, modelling, fabrication techniques, future challenges
    S Bhattarai, A Mhamdi, I Hossain, Y Raoui, R Pandey, J Madan, ...
    Micro and Nanostructures 172, 207450 2022
    Citations: 67

  • Exploring the impact of strain on the electronic and optical properties of inorganic novel cubic perovskite Sr3PI3
    MF Rahman, M Harun-Or-Rashid, MR Islam, A Ghosh, MK Hossain, ...
    Physica Scripta 98 (11), 115105 2023
    Citations: 66

  • Perovskite solar cells with dual light absorber layers for performance efficiency exceeding 30%
    S Bhattarai, MK Hossain, R Pandey, J Madan, DP Samajdar, MF Rahman, ...
    Energy & Fuels 37 (14), 10631-10641 2023
    Citations: 64

  • Boosting efficiency above 28% using effective charge transport layer with Sr 3 SbI 3 based novel inorganic perovskite
    MS Reza, MF Rahman, A Kuddus, MKA Mohammed, AK Al-Mousoi, ...
    RSC advances 13 (45), 31330-31345 2023
    Citations: 60

  • Investigating of novel inorganic cubic perovskites of A3BX3 (A= Ca, Sr, BP, As, X= I, Br) and their photovoltaic performance with efficiency over 28%
    A Ghosh, MF Rahman, A Kuddus, MKA Mohammed, MR Islam, ...
    Journal of Alloys and Compounds 986, 174097 2024
    Citations: 52

  • A novel graded approach for improving the efficiency of Lead-Free perovskite solar cells
    S Bhattarai, R Pandey, J Madan, D Muchahary, D Gogoi
    Solar Energy 244, 255-263 2022
    Citations: 47

  • Performance improvement approach of all inorganic perovskite solar cell with numerical simulation
    S Bhattarai, R Pandey, J Madan, F Ahmed, S Shabnam
    Materials Today Communications 33, 104364 2022
    Citations: 46

  • Optimizing the performance of Cs2AgBiBr6 based solar cell through modification of electron and hole transport layers
    N Shrivastav, J Madan, MKA Mohammed, AK Al-Mousoi, MK Hossain, ...
    Materials Today Communications 36, 106761 2023
    Citations: 40

  • Structural, electronic and optical characteristics of inorganic cubic perovskite Sr3AsI3
    A Ghosh, MF Rahman, MR Islam, MS Islam, M Khalid Hossain, ...
    Optics Continuum 2 (10), 2144-2153 2023
    Citations: 38

  • Boosting efficiency above 30% of novel inorganic Ba3SbI3 perovskite solar cells with potential ZnS electron transport layer (ETL)
    MF Rahman, MNH Toki, A Kuddus, MKA Mohammed, MR Islam, ...
    Materials Science and Engineering: B 300, 117073 2023
    Citations: 37