Issue 14, 2019
From the journal:

Journal of Materials Chemistry C

A cyclopentadithiophene-bridged small molecule acceptor with near-infrared light absorption for efficient organic solar cells†

Yuan-Qiu-Qiang Yi, ORCID logo a   Huanran Feng,a   Xin Ke,a   Jing Yan,a   Meijia Chang,a   Xiangjian Wan, ORCID logo a   Chenxi Lia  and  Yongsheng Chen ORCID logo *a  

* Corresponding authors

a Institute of Polymer Chemistry, Key Laboratory of Functional Polymer Chemistry, State Key Laboratory of Elemento-organic Chemistry, College of Chemistry, Nankai University, Tianjin, China
E-mail: yschen99@nankai.edu.cn

Abstract

A cyclopentadithiophene (DTC)-bridged acceptor–donor–acceptor (A–D–A) backboned small molecule acceptor (SMA), namely IDTC-4Cl, was designed and synthesized. In combination with strong electron-withdrawing (5,6-dichloro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene)dimalononitrile as a terminal group, IDTC-4Cl exhibits a near-infrared light absorption with an edge over 900 nm. Using PBDB-T as the polymer donor, the IDTC-4Cl based device gives a PCE of 9.51% with a Voc of 0.822 V, FF of 60.2% and Jsc of 19.14 mA cm−2. Upon introduction of PC71BM as the third component, the ternary OSCs show an enhanced PCE of 10.41% with a much improved FF of 65.6%, which exemplifies the potential of utilizing a DTC unit to construct an SMA for high-performance organic photovoltaics.

Graphical abstract: A cyclopentadithiophene-bridged small molecule acceptor with near-infrared light absorption for efficient organic solar cells

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Article information

DOI
https://doi.org/10.1039/C9TC00162J
Article type
Communication
Submitted
10 Jan 2019
Accepted
28 Feb 2019
First published
01 Mar 2019

J. Mater. Chem. C, 2019,7, 4013-4019

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A cyclopentadithiophene-bridged small molecule acceptor with near-infrared light absorption for efficient organic solar cells

Y. Yi, H. Feng, X. Ke, J. Yan, M. Chang, X. Wan, C. Li and Y. Chen, J. Mater. Chem. C, 2019, 7, 4013 DOI: 10.1039/C9TC00162J

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