High‐Efficiency All‐Small‐Molecule Organic Solar Cells Based on an Organic Molecule Donor with Alkylsilyl‐Thienyl Conjugated Side Chains

Bin, Haijun; Yao, Jia; Yang, Yankang; Angunawela, Indunil; Sun, Chenkai; Gao, Liang; Ye, Long; Qiu, Beibei; Xue, Lingwei; Zhu, Chenhui; Yang, Chunhe; Zhang, Zhi‐Guo; Ade, Harald; Li, Yongfang

doi:10.1002/adma.201706361

High‐Efficiency All‐Small‐Molecule Organic Solar Cells Based on an Organic Molecule Donor with Alkylsilyl‐Thienyl Conjugated Side Chains

Journal Article · Mon May 21 00:00:00 EDT 2018 · Advanced Materials

DOI:https://doi.org/10.1002/adma.201706361· OSTI ID:1438077

Bin, Haijun ^[1]; Yao, Jia ^[2]; Yang, Yankang ^[1]; Angunawela, Indunil ^[3]; Sun, Chenkai ^[4]; Gao, Liang ^[4]; Ye, Long ^[3]; Qiu, Beibei ^[4]; Xue, Lingwei ^[4]; Zhu, Chenhui ^[5]; Yang, Chunhe ^[6]; Zhang, Zhi‐Guo ^[4]; Ade, Harald ^[3]; ^[7]

CAS Research/Education Center for Excellence in Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China, School of Chemical Science University of Chinese Academy of Sciences Beijing 100049 China
CAS Research/Education Center for Excellence in Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China, Department of Chemistry School of Science Beijing JiaoTong University Beijing 100044 China
Department of Physics and Organic and Carbon Electronics Lab (ORaCEL) North Carolina State University Raleigh NC 27695 USA
CAS Research/Education Center for Excellence in Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
Department of Chemistry School of Science Beijing JiaoTong University Beijing 100044 China
CAS Research/Education Center for Excellence in Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China, School of Chemical Science University of Chinese Academy of Sciences Beijing 100049 China, Laboratory of Advanced Optoelectronic Materials College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China

Abstract

Two medium‐bandgap p‐type organic small molecules H21 and H22 with an alkylsily‐thienyl conjugated side chain on benzo[1,2‐ b :4,5‐ b ′]dithiophene central units are synthesized and used as donors in all‐small‐molecule organic solar cells (SM‐OSCs) with a narrow‐bandgap n‐type small molecule 2,2′‐((2Z,2′Z)‐((4,4,9,9‐tetrahexyl‐4,9‐dihydro‐ s ‐indaceno[1,2‐ b :5,6‐ b ′]dithiophene‐2,7‐diyl)bis(methanylylidene))bis(3‐oxo‐2,3‐dihydro‐1H‐indene‐2,1‐diylidene))dimalononitrile (IDIC) as the acceptor. In comparison to H21 with 3‐ethyl rhodanine as the terminal group, H22 with cyanoacetic acid esters as the terminal group shows blueshifted absorption, higher charge‐carrier mobility and better 3D charge pathway in blend films. The power conversion efficiency (PCE) of the SM‐OSCs based on H22:IDIC reaches 10.29% with a higher open‐circuit voltage of 0.942 V and a higher fill factor of 71.15%. The PCE of 10.29% is among the top efficiencies of nonfullerene SM‐OSCs reported in the literature to date.

View Accepted Manuscript (Publisher)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1438077

Journal Information:: Advanced Materials, Journal Name: Advanced Materials Journal Issue: 27 Vol. 30; ISSN 0935-9648

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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