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arXiv · 1708.02935

Preparation of CH3NH3PbI3 thin films with tens of micrometer scale at high temperature

Hao Zhang·Mian Tao·Baizhi Gao·Wei Chen·Qi Li·Qingyu Xu·Shuai Dong
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Abstract

The fabrication of high-quality organic-inorganic hybrid halide perovskite layers is the key prerequisite for the realization of high efficient photon energy harvest and electric energy conversion in their related solar cells. In this article, we report a novel fabrication technique of CH3NH3PbI3 layer based on high temperature chemical vapor reaction. CH3NH3PbI3 layers have been prepared by the reaction of PbI2 films which were deposited by pulsed laser deposition, with CH3NH3I vapor at various temperatures from 160 oC to 210 oC. X-ray diffraction patterns confirm the formation of pure phase, and photoluminescence spectra show the strong peak at around 760 nm. Scanning electron microscopy images confirm the significantly increased average grain size from nearly 1 μm at low reaction temperature of 160 oC to more than 10 μm at high reaction temperature of 200 oC. The solar cells were fabricated, and short-circuit current density of 15.75 mA/cm2, open-circuit voltage of 0.49 V and fill factor of 71.66% have been obtained.

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Hao Zhang, Mian Tao, Baizhi Gao, Wei Chen, Qi Li, Qingyu Xu, Shuai Dong. 2017-07-20. Preparation of CH3NH3PbI3 thin films with tens of micrometer scale at high temperature. https://doi.org/10.1038/s41598-017-09109-0

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