Room-temperature and solution-processed copper iodide as the hole transport layer for inverted planar perovskite solar cells.

Author(s) Sun, W.; Ye, S.; Rao, H.; Li, Y.; Liu, Z.; Xiao, L.; Chen, Z.; Bian, Z.; Huang, C.
Journal Nanoscale
Date Published 2016 Sep 21
Abstract

UNLABELLED: Inverted planar heterojunction perovskite solar cells with poly (3,4-ethylenedioxythiophene):poly (styrenesulfonate) sulfonic acid (

PEDOT: PSS) as the hole transport layer (HTL) have attracted significant attention during recent years. However, these devices suffer from a serious stability issue due to the acidic and hygroscopic characteristics of

PEDOT: PSS. In this work, we demonstrate a room-temperature and solution-processed CuI film which is used as the HTL for inverted perovskite solar cells. As a result, an impressive PCE of 16.8% is achieved by the device based on the CuI HTL. Moreover, the unsealed CuI-based device displays enhanced air stability compared to the

PEDOT: PSS-based device. In addition, the fabrication of the CuI HTL is a simple and time-saving procedure without any post-treatment, thus making it a promising candidate as the HTL in inverted perovskite solar cells and a potential target for efficient flexible and tandem solar cells.

DOI 10.1039/c6nr04288k
ISSN 2040-3372
Citation Sun W, Ye S, Rao H, Li Y, Liu Z, Xiao L, et al. Room-temperature and solution-processed copper iodide as the hole transport layer for inverted planar perovskite solar cells. Nanoscale. 2016;8(35):15954-60.

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