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Improved performance of planar perovskite solar cells via ethanol-vapor annealing treatment

J. WU, J. J. DONG1,* , H. Y. HAO1, J. XING1, H. LIU1

Affiliation

  1. School of Science, China University of Geosciences (Beijing), 29 Xue Yuan Road, Haidian District, Beijing, 100083, China

Abstract

In this paper, ethanol-vapor annealing treatment on perovskite thin films is reported, aiming to increase grain size, reduce defect states and improve crystallinity of the perovskite films, thus improving the performance of the planar perovskite solar cells (PSCs). Here, we show a two-step annealing method, ethanol-vapor annealing followed by normal heat treatment in Ar atmosphere, to prepare pinhole-free perovskite films with large grain size and few defects. The planar PSCs containing perovskite films prepared by this two-step annealing, exhibit much higher power conversion efficiency, which has been improved from 9.62% to 12.00%. Thus, our method provides a facile and simple way to improve the device performance of PSCs..

Keywords

Perovskite, Ethanol-vapor annealing, Crystallinity, Solar cells.

Citation

J. WU, J. J. DONG, H. Y. HAO, J. XING, H. LIU, Improved performance of planar perovskite solar cells via ethanol-vapor annealing treatment, Optoelectronics and Advanced Materials - Rapid Communications, 13, 3-4, March-April 2019, pp.202-208 (2019).

Submitted at: Aug. 17, 2018

Accepted at: April 8, 2019