journal article·2022-01

Chlorination Enabling a Low‐Cost Benzodithiophene‐Based Wide‐Bandgap Donor Polymer with an Efficiency of over 17%

Hang Wang, Hao Lu, Ya‐Nan Chen, Guangliu Ran, Andong Zhang, Dawei Li, Na Yu, Zhe Zhang, Yahui Liu, Xinjun Xu, Wenkai Zhang, Qinye Bao, Zheng Tang, Zhishan Bo

Advanced Materials· Volume 34· Issue 4
Publisher page

Abstract

Abstract Three regioregular benzodithiophene‐based donor–donor (D–D)‐type polymers (PBDTT, PBDTT1Cl, and PBDTT2Cl) are designed, synthesized, and used as donor materials in organic solar cells (OSCs). Because of the weak intramolecular charge‐transfer effect, these polymers exhibit large optical bandgaps (>2.0 eV). Among these three polymers, PBDTT1Cl exhibits more ordered and closer molecular stacking, and its devices demonstrate higher and more balanced charge mobilities and a longer charge‐separated state lifetime. As a result of these comprehensive benefits, PBDTT1Cl‐based OSCs give a very impressive power conversion efficiency (PCE) of 17.10% with a low nonradiative energy loss (0.19 eV). Moreover, PBDTT1Cl also possesses a low figure‐of‐merit value and good universality to match with different acceptors. This work provides a simply and efficient strategy to design low‐cost high‐performance polymer donor materials.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Conducting polymers and applications

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

Affiliations

College of Textiles & Clothing State Key Laboratory of Bio‐fibers and Eco‐textiles Qingdao University Qingdao 266071 China

Beijing Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University Beijing 100875 China

Department of Physics and Applied Optics Beijing Area Major Laboratory Beijing Normal University Beijing 100875 China

Key Laboratory of Eco‐functional Polymer Materials of the Ministry of Education Key Laboratory of Eco‐environmental Polymer Materials of Gansu Province College of Chemistry and Chemical Engineering Northwest Normal University Lanzhou 730070 China

Center for Advanced Low‐Dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China

Key Laboratory of Polar Materials and Devices Department of Optoelectronics East China Normal University Shanghai 200241 China

Funding

National Natural Science Foundation of China · China Postdoctoral Science Foundation

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