Issue 17, 2015

High performance inverted structure perovskite solar cells based on a PCBM:polystyrene blend electron transport layer

Abstract

Hybrid organic/inorganic perovskite solar cells are among the most competitive emerging photovoltaic technologies. Here, we report on NiO-based inverted structure perovskite solar cells with a high power conversion efficiency of 10.68%, which is achieved by adding a small percentage (1.5 wt%) of high molecular weight polystyrene (PS) into the PCBM electron transport layer (ETL). The addition of PS facilitates the formation of a highly smooth and uniform PCBM ETL that is more effective in preventing undesirable electron–hole recombination between the perovskite layer and the top electrode. As a result, the VOC of the PCBM:PS-based cells is increased from 0.97 V to 1.07 V, which leads to significantly enhanced power conversion efficiencies of the solar cells. Our study provides a simple and low-cost approach to improving the ETL film quality and the performance of inverted perovskite solar cells.

Graphical abstract: High performance inverted structure perovskite solar cells based on a PCBM:polystyrene blend electron transport layer

Supplementary files

Article information

Article type
Communication
Submitted
06 Oct 2014
Accepted
01 Dec 2014
First published
23 Dec 2014

J. Mater. Chem. A, 2015,3, 9098-9102

High performance inverted structure perovskite solar cells based on a PCBM:polystyrene blend electron transport layer

Y. Bai, H. Yu, Z. Zhu, K. Jiang, T. Zhang, N. Zhao, S. Yang and H. Yan, J. Mater. Chem. A, 2015, 3, 9098 DOI: 10.1039/C4TA05309E

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