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Issue 17, 2015

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

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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


Submitted
06 Oct 2014
Accepted
01 Dec 2014
First published
23 Dec 2014

J. Mater. Chem. A, 2015,3, 9098-9102
Article type
Communication

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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