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Optimal design of efficient hole transporting layer free planar perovskite solar cell

高效无空穴传输层平板钙钛矿太阳能电池的优化设计

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Abstract

Hole transporting layer (HTL) free organometal halide perovskite solar cells have shown great promise in simplifying device architecture, fabrication process and enhancing stability. However, the simple elimination of the HTL from the standard sandwiched configuration suffers from relatively poor device performance; additionally, the mechanism of the HTL-free perovskite solar cell is still unclear. Herein, we applied a one-dimensional modeling program wxAMPS to investigate the planar HTL-free perovskite solar cells by adjusting the absorber thickness, doping and the absorber/back contact band alignment. The simulation results reveal the importance of the moderate absorber thickness as well as the p-doping perovskite rather than intrinsic as in sandwich structure to the overall device efficiency. In the meanwhile, reducing the mismatching of the absorber/back contact by using higher work function back contact material in replacement of commonly utilized Au electrode is more favorable to improve the device performance. Through optimizing, high performance HTL-free perovskite solar cell with efficiency approaching 17% could be achieved. This study is helpful in providing theoretical guidance for the design of HTL-free perovskite solar cells.

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Correspondence to Meicheng Li  (李美成).

Additional information

Tianyue Wang is a postgraduate candidate of the School of Renewable Energy at North China Electric Power University. She joined Prof. Li’s New Energy Materials and Devices group in 2014, and her current interests include dye-sensitized solar cells and perovskite solar cells.

Meicheng Li is the director of the Center for New EnergyMaterials and Photoelectric Technology at the School of Renewable Energy in North China Electric Power University. His current focus is silicon nanowire based photovoltaic devices, including fundamental understanding, applied research and development (R&D), and flexible device design. He also has interest in R&D of perovskite solar cells, lithium ion battery system and other renewable energy devices (solar devices, sensors, etc.).

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Wang, T., Chen, J., Wu, G. et al. Optimal design of efficient hole transporting layer free planar perovskite solar cell. Sci. China Mater. 59, 703–709 (2016). https://doi.org/10.1007/s40843-016-5108-4

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  • DOI: https://doi.org/10.1007/s40843-016-5108-4

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