A tetracyclic-bislactone-based copolymer donor for efficient semitransparent organic photovoltaics

Mingjie Li; Tai An; Zongliang Ou; Ke Jin; Zhiwen Jin; Keyou Yan; He Tian; Wentao Wang; Shangfeng Yang; Guan-Wu Wang; Qiuling Song; Zuo Xiao; Liming Ding

doi:10.1039/D3MA00179B

A tetracyclic-bislactone-based copolymer donor for efficient semitransparent organic photovoltaics†

Mingjie Li,‡^ab Tai An,‡^bc Zongliang Ou,^bd Ke Jin,^bc Zhiwen Jin,

^e Keyou Yan,

^f He Tian,

^g Wentao Wang,^h Shangfeng Yang,

ⁱ Guan-Wu Wang,

*^a Qiuling Song,*^d Zuo Xiao

*^bc and Liming Ding

^bc

Author affiliations

* Corresponding authors

^a Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
E-mail: gwang@ustc.edu.cn

^b Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China
E-mail: xiaoz@nanoctr.cn

^c University of Chinese Academy of Sciences, Beijing 100049, China

^d Institute of Next Generation Matter Transformation, College of Materials Science & Engineering, Huaqiao University, Xiamen 361021, China
E-mail: qsong@hqu.edu.cn

^e School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China

^f School of Environment and Energy, South China University of Technology, Guangzhou 510000, China

^g School of Integrated Circuits, Tsinghua University, Beijing 100084, China

^h School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China

ⁱ Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China

Abstract

A copolymer donor PBDTTPTP based on a tetracyclic bislactone unit, thieno[2′,3′:5,6]pyrano[3,4-d]thieno[3,2-b]pyran-4,9-dione (TPTP), was developed. The single crystal structure of a TPTP derivative indicates the π-extended planar geometry of TPTP and its good coplanarity with the adjacent thiophene units. Thanks to the strong electron-withdrawing properties and good coplanarity of TPTP, the copolymer PBDTTPTP shows a deep HOMO level of −5.60 eV, a small optical bandgap of 1.65 eV and a good hole mobility of 6.57 × 10⁻⁴ cm² V⁻¹ s⁻¹. These features make PBDTTPTP an efficient donor material for semitransparent organic photovoltaics (STOPVs). STOPVs based on PBDTTPTP and N3 gave a high light utilization efficiency of 4.38%, with a power conversion efficiency of 12.26% and an average visible light transmittance of 35.7%.

This article is part of the themed collection: Popular Advances

Materials Advances

A tetracyclic-bislactone-based copolymer donor for efficient semitransparent organic photovoltaics†

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A tetracyclic-bislactone-based copolymer donor for efficient semitransparent organic photovoltaics

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