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1. Efficient and hysteresis-less pseudo-planar heterojunction perovskite solar cells fabricated by a facile and solution-saving one-step dip-coating method.

Author

Huang, Like, Li, Chang, Sun, Xiaoxiang, Xu, Rui, Du, Yangyang, Ni, Jian, Cai, Hongkun, Li, Juan, Hu, Ziyang, and Zhang, Jianjun

Subjects
*PEROVSKITE, *SOLAR cells, *ELECTRON transport, *TITANIUM dioxide, *HETEROJUNCTIONS, *SPIN coating, *HYSTERESIS
Abstract

Rough dense sol-gel-derived titanium dioxide (TiO 2 ) electron-transport layers (ETLs) and smooth organolead halide perovskite (PVK) films for pseudo-planar heterojunction perovskite solar cells (P-PH PVKSCs) were fabricated by a facile one-step dip-coating method. The highly compact TiO 2 ETLs and uniform PVK films endow the device a high power conversion efficiency (PCE) of over 11%, which was nearly identical to that of a reference device (12%) fabricated by conventional spin-coating. Furthermore, the device showed no pronounced hysteresis when tested by scanning the voltage in a forward and backward direction, showing the potential of facile and waste-free dip-coating in replacing of spin-coating for large area perovskite solar cells preparation. Lastly, the hysteresis was compared and discussed and models regarding the abnormal hysteresis, roll-over and current peak phenomena were proposed as well. [ABSTRACT FROM AUTHOR]

Published
2017
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