Molecular Optimization Enables over 13% Efficiency in Organic Solar Cells

Wenchao Zhao; Sunsun Li; Huifeng Yao; Shaoqing Zhang; Yun Zhang; Bei Yang; Jianhui Hou

doi:10.1021/jacs.7b02677

Molecular Optimization Enables over 13% Efficiency in Organic Solar Cells

J Am Chem Soc. 2017 May 31;139(21):7148-7151. doi: 10.1021/jacs.7b02677. Epub 2017 May 22.

Authors

Wenchao Zhao^{1

2}, Sunsun Li^{1

2}, Huifeng Yao^{1

2}, Shaoqing Zhang^{1

2}, Yun Zhang^{1

2}, Bei Yang^{1

2}, Jianhui Hou^{1

2}

Affiliations

¹ Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.
² University of Chinese Academy of Sciences , Beijing 100049, China.

PMID: 28513158
DOI: 10.1021/jacs.7b02677

Abstract

A new polymer donor (PBDB-T-SF) and a new small molecule acceptor (IT-4F) for fullerene-free organic solar cells (OSCs) were designed and synthesized. The influences of fluorination on the absorption spectra, molecular energy levels, and charge mobilities of the donor and acceptor were systematically studied. The PBDB-T-SF:IT-4F-based OSC device showed a record high efficiency of 13.1%, and an efficiency of over 12% can be obtained with a thickness of 100-200 nm, suggesting the promise of fullerene-free OSCs in practical applications.

Publication types

Research Support, Non-U.S. Gov't