High efficiency ternary organic solar cell with morphology-compatible polymers

Jiangquan Mai, Haipeng Lu, Tsz Ki Lau, Shih Hao Peng, Chain-Shu Hsu, Wenqiang Hua, Ni Zhao, Xudong Xiao, Xinhui Lu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

52 Scopus citations

Abstract

Ternary organic solar cell is a promising strategy for improving the power conversion efficiency (PCE) of single-junction organic solar cells by broadening the light absorption spectrum with the incorporation of two electron donors and one acceptor or one donor and two acceptors. However, in many cases the optimized loading of the third component is so small that its contribution to the light absorption is limited. Following our previously proposed selection rule for the two polymers capable of comparable loadings, we report in this work a ternary system composed of two morphologically compatible polymers with distinct chemical structures that can achieve a high PCE of 9.0% with a mass ratio of 1:1. Besides the expected improvement in short circuit current due to the broadening of the absorption spectrum, the fill factor of the ternary device is improved significantly. We attribute it to the balanced electron and hole mobility and reduced recombination benefiting from the high morphology compatibility of the system.

Original languageEnglish
Pages (from-to)11739-11745
Number of pages7
JournalJournal of Materials Chemistry A
Volume5
Issue number23
DOIs
StatePublished - 1 Jan 2017

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