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Numerical simulation of electron-transport-layer-free CH3NH3Pb(I1−xBrx)3 perovskite solar cells

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Abstract

Numerical simulation can provide an effective theoretical basis for studying carrier transport, collection and diffusion in perovskite solar cells. We used SCAPS-1D software to perform numerical simulations based on CH3NH3Pb(I1−xBrx)3 solar cells. First, we analyzed the thickness of the absorbing layer, doping concentration and defect density, and found that the thickness of 0.5 μm and the defect density of 3 × 1011 cm−3 have great photoelectric conversion performance. We then adjusted the thickness and doping concentration of the hole transport layer to further optimize the P3HT hole transport and diffusion performance. In addition, we found that the interface defect layer has little effect on device performance, but the FTO layer plays an important role in the electron-free layer structure of transmitting electrons. Finally, we compared the electron-transport-layer-free structure with the traditional electron transport layer structure containing PC61BM, SnO2, TiO2 and C60, and predicted the excellent photoelectric conversion performance of the electron-transport-layer-free solar cell structure by 26.15%. Our work simplifies the preparation process of traditional solar cells, providing new insights not only for the development of high-efficiency solar cells, but also for the development of solar cells without electron transport layers.

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Funding

This work was partially sponsored by Nation Natural Science Foundation of China (52076126), and Shanghai Science and Technology Committee (22010501500), Key Laboratory of Clean Power Generation and Environmental Protection Technology in Mechanical Industry.

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Authors and Affiliations

  1. College of Energy and Mechanical Engineering, Shanghai University of Electric Power, No. 2103 Pingliang Road, Shanghai, 200090, People’s Republic of China

    Weiqun Chu, Xin Zhang, Wenhao Li, Cheng Peng, Yang Liu, Fangqin Li, Maoliang Wu, Jiang Wu & Zhanmin Zhu

  2. College of Mathematics and Physics, Shanghai University of Electric Power, Shanghai, 200090, People’s Republic of China

    Jia Lin

Authors
  1. Weiqun Chu
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  2. Xin Zhang
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  3. Wenhao Li
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  4. Cheng Peng
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  5. Yang Liu
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  6. Fangqin Li
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  7. Jia Lin
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  8. Maoliang Wu
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  9. Jiang Wu
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  10. Zhanmin Zhu
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Contributions

WC: Writing—original draft, Formal analysis, Software, Data curation, Conceptualization, Writing—review & editing. XZ: Supervision, Data curation. WL: Validation, Supervision, Software. CP: Investigation. YL: Resources. FL: Investigation. JL: Supervision. MW and JW: Writing—review & editing, Project administration. ZZ: Resources.

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Correspondence to Maoliang Wu or Jiang Wu.

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Chu, W., Zhang, X., Li, W. et al. Numerical simulation of electron-transport-layer-free CH3NH3Pb(I1−xBrx)3 perovskite solar cells. Opt Quant Electron 55, 351 (2023). https://doi.org/10.1007/s11082-023-04554-w

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