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Issue 16, 2018
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Efficient device engineering for inverted non-fullerene organic solar cells with low energy loss

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Abstract

In recent years, the use of non-fullerene acceptors in organic solar cells has rapidly advanced with new acceptor materials, which have enabled devices to achieve a power conversion efficiency greater than 13%. In addition to new acceptor materials’ design, device engineering plays an important role in improving the device performance. In this study, we develop effective device engineering strategies, including thermal annealing and interlayer modification, to improve the device performance from 7.39% to 9.39%. With the use of PTB7-Th as the donor and IDT-BT-R as the non-fullerene acceptor, we achieved an efficient non-fullerene organic solar cell based on an inverted device architecture with a power conversion efficiency as high as 9.39%. It is worthy of note that the energy loss of the optimized device is only around 0.5 eV, which can be attributed to weak recombination and the appropriate high energy level of the charge transfer states within the optimized device.

Graphical abstract: Efficient device engineering for inverted non-fullerene organic solar cells with low energy loss

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Supplementary files

Article information


Submitted
08 Feb 2018
Accepted
12 Mar 2018
First published
13 Mar 2018

J. Mater. Chem. C, 2018,6, 4457-4463
Article type
Paper

Efficient device engineering for inverted non-fullerene organic solar cells with low energy loss

J. Xiao, Z. Chen, G. Zhang, Q. Li, Q. Yin, X. Jiang, F. Huang, Y. Xu, H. Yip and Y. Cao, J. Mater. Chem. C, 2018, 6, 4457
DOI: 10.1039/C8TC00705E

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