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Nature Research, Scientific Reports, 1(3), 2013

DOI: 10.1038/srep03356

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Solution-processed small-molecule solar cells: breaking the 10% power conversion efficiency

Journal article published in 2013 by Yongsheng Liu ORCID, Chun-Chao Chen, Ziruo Hong, Jing Gao, Yang (Michael) Yang, Yang Michael Yang, Huanping Zhou, Letian Dou, Gang Li ORCID, Yang Yang
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

A two-dimensional conjugated small molecule (SMPV1) was designed and synthesized for high performance solution-processed organic solar cells. This study explores the photovoltaic properties of this molecule as a donor, with a fullerene derivative as an acceptor, using solution processing in single junction and double junction tandem solar cells. The single junction solar cells based on SMPV1 exhibited a certified power conversion efficiency of 8.02% under AM 1.5 G irradiation (100 mW cm(-2)). A homo-tandem solar cell based on SMPV1 was constructed with a novel interlayer (or tunnel junction) consisting of bilayer conjugated polyelectrolyte, demonstrating an unprecedented PCE of 10.1%. These results strongly suggest solution-processed small molecular materials are excellent candidates for organic solar cells.