journal article·2019-12-26

Simple-Structured NIR-Absorbing Small-Molecule Acceptors with a Thiazolothiazole Core: Multiple Noncovalent Conformational Locks and D–A Effect for Efficient OSCs

Wenhong Peng, Guangjun Zhang, Mengbing Zhu, Hao Xia, Yingshuang Zhang, Hua Tan, Yu Liu, Weijie Chi, Qiang Peng, Weiguo Zhu

ACS Applied Materials & Interfaces· Volume 11· Issue 51
Publisher page

Abstract

Developing simple-structured and efficient near-infrared (NIR) absorbing small-molecule acceptors (SMAs) remains of great importance for commercial applications in organic solar cells (OSCs). Herein, we construct two novel thiazolothiazole-centered NIR-absorbing SMAs by alkoxy/alkylthio side chains (TTz3/TTz4) and multiple noncovalent conformational locks of S···N, S···O, and S···S. These conformational locks make both simple-structured SMAs exhibit an extended planar configuration and a red-shifted NIR absorption in comparison with the SMA with an alkyl side chain (TTz1). As expected, both SMAs show high-efficiency photovoltaic performance in the solution-processing OSCs using J71 as a donor. A higher power conversion efficiency of 8.76% with a low energy loss (0.57 eV) is obtained in the TTz3-based OSCs. It is the first report on the simple-structured and efficient NIR-absorbing SMAs, which have great potential applied in the semitransparent OSCs.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Organic Light-Emitting Diodes Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu Engineering Laboratory of Light-Electricity-Heat Energy-Converting Materials and Applications, Jiangsu Key Laboratories of Environment-Friendly Polymers, National Experimental Demonstration Center for Materials Science and Engineering, Changzhou University, Changzhou 213164, China

Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610064, China

Fluorescence Research Group, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372, Singapore

Funding

State Key Laboratory of Polymer Materials Engineering · National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions · Research Innovation Program for Postgraduate of Jiangsu Province · Jiangsu Provincial Talents Project of High-Level Innovation and Entrepreneurship · Major Program of the Natural Science Research of Jiangsu Higher Education Institutions · Top-notch Academic Programs Project for Polymeric Materials Science and Engineering

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