Efficient Charge Transfer and Fine-Tuned Energy Level Alignment in a THF-Processed Fullerene-Free Organic Solar Cell with 11.3% Efficiency

Zhong Zheng; Omar M Awartani; Bhoj Gautam; Delong Liu; Yunpeng Qin; Wanning Li; Alexander Bataller; Kenan Gundogdu; Harald Ade; Jianhui Hou

doi:10.1002/adma.201604241

Efficient Charge Transfer and Fine-Tuned Energy Level Alignment in a THF-Processed Fullerene-Free Organic Solar Cell with 11.3% Efficiency

Adv Mater. 2017 Feb;29(5). doi: 10.1002/adma.201604241. Epub 2016 Nov 28.

Authors

Zhong Zheng^{1

2}, Omar M Awartani³, Bhoj Gautam³, Delong Liu^{1

2}, Yunpeng Qin¹, Wanning Li^{1

2}, Alexander Bataller³, Kenan Gundogdu³, Harald Ade³, Jianhui Hou^{1

2}

Affiliations

¹ Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
² University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
³ Department of Physics and ORaCEL, North Carolina State University, Raleigh, NC, 27695, USA.

PMID: 27893177
DOI: 10.1002/adma.201604241

Abstract

Fullerene-free organic solar cells show over 11% power conversion efficiency, processed by low toxic solvents. The applied donor and acceptor in the bulk heterojunction exhibit almost the same highest occupied molecular orbital level, yet exhibit very efficient charge creation.

Keywords: aligned HOMO levels; efficient charge creation; efficient charge transport; green solvents; non-fullerene organic solar cells.