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Hole-conductor-free perovskite solar cells

Published online by Cambridge University Press:  16 June 2020

Deyi Zhang
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China;
Yaoguang Rong
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China;
Yue Hu
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China;
Anyi Mei
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China;
Hongwei Han
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China;
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Metal-halide perovskite solar cells (PSCs) have become a promising candidate for photovoltaic applications. Current popular organic hole conductors for highly efficient PSCs bring cost and stability issues, which hinder the commercialization of the PSCs. Hole-conductor-free PSCs are attracting great interest because they eliminate the adverse effects of organic hole conductors by transporting holes in the perovskite itself. In this article, we summarize recent progress in conventional, inverted, and printable mesoscopic hole-conductor-free PSCs. Specifically, we emphasize the stunning stability and scale-up manufacturing of printable hole-conductor-free PSCs, discussing their potential from laboratory to market. The causes for hole-conductor-free PSCs’ current low efficiency are also discussed, and are primarily ascribed to energy-level alignment and interface recombination. We believe that the efficiencies of hole-conductor-free PSCs can be enhanced to be comparable with hole-conductor-containing PSCs by interface modification and material design.

Halide Perovskite Opto- and Nanoelectronic Materials and Devices
Copyright © Materials Research Society 2020

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