Abstract
Here, we report an enhanced photovoltaic (PV) performance including open circuit voltage (Voc), short circuit current (Jsc), fill factor (FF) and power conversion efficiency (PCE) of Ni/PEDOT:PSS/n-Si/n-ZnO/Al heterojunction solar cells (HSCs) via numerical simulation. In this structure, n-ZnO is introduced at the interface of Si and Al as back surface field (BSF). Firstly, influence of various device parameters, such as thickness of Si, and PEDOT:PSS layers, carrier concentrations and defect density of Si and PEDOT:PSS on the PV performances of device without ZnO-BSF has been investigated numerically employing Solar Cell Capacitance Simulator (SCAPS-1D) software to find the best possible performance parameters of such HSCs. The maximum PCE of the optimized PEDOT:PSS/n-Si HSC without BSF is achieved as 24.26% with Voc: 0.647 V, Jsc: 44.87 mA/cm2, and FF: 83.52% for tSi of 150 μm with Nd of 1 × 1016 cm−3. After introducing the ZnO-BSF layer of thickness and carrier concentration of 20 nm and 1 × 1017 cm−3 respectively, the significant enhancement in the PCE of the device has been observed. The PCE as high as 31.37% with Voc: 0.784 V, Jsc: 45.31 mA/cm2, and FF: 88.35% was obtained for an optimized ZnO-BSF layer. The PCE is more than 7% (absolute) higher than that of without ZnO-BSF layer. The significant improvement in the PV parameters, primarily in Voc by ~ 137 mV was caused by high built-in potential developed across the junction after insertion of the ZnO-BSF layer. The quantum efficiency of the device further supported the enhanced performance resulting from the reduced recombination of charge carriers at the rear side after n-ZnO-BSF layer. The present numerical simulation study proposes a great potential of ZnO as the BSF layer for the enhanced PV performance of PEDOT:PSS/n-Si based HSCs.
Graphical abstract
Highlights
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Simulation study of PEDOT:PSS/Si heterojunction solar cells (HSCs) by SCAPS-1D.
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Investigation of Si and PEDOT:PSS thickness, carrier and defect concentrations on PCE.
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Significant enhancement in solar cell performance by ZnO-BSF based device structure.
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Maximum PCE of > 31.0% and Voc 0.78 V in ZnO-BSF based HSCs predicted by simulation.
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Enhancement in Voc explained by built-in potential developed across rear junction.
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All data generated or analysed during the study are included in this article.
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Acknowledgements
Authors are grateful to Director, CSIR-National Physical Laboratory, New Delhi India for kind support. Premshila Kumari highly acknowledges National Renewable Energy Fellowship Ministry of New and Renewable Energy (NREF-MNRE), Govt. of India (grant code: 342-12/5/2019-HRD) for the research fellowship. U.P., D.S. and A.S. also acknowledge the research fellowships from University Grants Commission (UGC) (NTA Ref. No. 191620050801), Council of Scientific & Industrial Research (CSIR), India (grant code: 31/ 001(0623)/2019-EMR-I), and Department of Science and Technology (DST), Govt. of India (Inspire fellowship, grant code: DST/INSPIRE/Fellowship/2018/IF 180040). respectively. Authors also thank Professor Marc Burgelman, University of Gent, Belgium, for providing SCAPS simulation software.
Funding
Authors, Premshila Kumari, Urvashi Punia, Deepak Sharma, and Avritti Srivastava received research fellowships from National Renewable Energy Fellowship Ministry of New and Renewable Energy (NREF-MNRE), Govt. of India (grant code: 342–12/5/2019-HRD); University Grants Commission (UGC) (NTA Ref. No. 191620050801); Council of Scientific and Industrial Research (CSIR), Govt. of India (grant code: 31/001(0623)/2019-EMR-I); and Department of Science and Technology (DST), Govt. of India (Inspire fellowship, grant code: DST/INSPIRE/Fellowship/2018/ IF 180040) respectively.
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Premshila Kumari: Simulation work, data collection and analysis, writing manuscript first draft; Urvashi Punia: Data collection and analysis; Deepak Sharma: Assisted in data analysis and rearranging the manuscript first draft; Avritti Srivastava: Assisted in data analysis and rearranging the manuscript first draft; Sanjay K. Srivastava: Conceptualization, review & editing, resources, supervision. All authors read and approved the final manuscript.
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Kumari, P., Punia, U., Sharma, D. et al. Enhanced Photovoltaic Performance of PEDOT:PSS/Si Heterojunction Solar Cell with ZnO BSF Layer: A Simulation Study using SCAPS-1D. Silicon 15, 2099–2112 (2023). https://doi.org/10.1007/s12633-022-02163-y
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DOI: https://doi.org/10.1007/s12633-022-02163-y