Reduced Intramolecular Twisting Improves the Performance of 3D Molecular Acceptors in Non-Fullerene Organic Solar Cells

Haoran Lin; Shangshang Chen; Huawei Hu; Lu Zhang; Tingxuan Ma; Joshua Yuk Lin Lai; Zhengke Li; Anjun Qin; Xuhui Huang; Benzhong Tang; He Yan

doi:10.1002/adma.201600997

Reduced Intramolecular Twisting Improves the Performance of 3D Molecular Acceptors in Non-Fullerene Organic Solar Cells

Adv Mater. 2016 Oct;28(38):8546-8551. doi: 10.1002/adma.201600997. Epub 2016 Aug 9.

Authors

Haoran Lin^{1

2}, Shangshang Chen^{1

2}, Huawei Hu², Lu Zhang³, Tingxuan Ma², Joshua Yuk Lin Lai², Zhengke Li^{1

2}, Anjun Qin⁴, Xuhui Huang³, Benzhong Tang^{2

4}, He Yan^{5

6

7}

Affiliations

¹ Hong Kong University of Science and Technology-Shenzhen Research Institute, No. 9 Yuexing 1st RD, Hi-tech Park, Nanshan, Shenzhen, 518057, China.
² Department of Chemistry and Energy Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, 999077.
³ Department of Chemistry and State Key Laboratory of Molecular Neuroscience, Center for System Biology and Human Health, School of Science and IAS, The Hong Kong University of Science and Technology, Kowloon, Hong Kong, 999077.
⁴ State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China.
⁵ Hong Kong University of Science and Technology-Shenzhen Research Institute, No. 9 Yuexing 1st RD, Hi-tech Park, Nanshan, Shenzhen, 518057, China. [email protected].
⁶ Department of Chemistry and Energy Institute, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, 999077. [email protected].
⁷ State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China. [email protected].

PMID: 27501996
DOI: 10.1002/adma.201600997

Abstract

A small-molecular acceptor, tetraphenylpyrazine-perylenediimide tetramer (TPPz-PDI₄ ), which has a reduced extent of intramolecular twisting compared to two other small-molecular acceptors is designed. Benefiting from the lowest extent of intramolecular twisting, TPPz-PDI₄ exhibits the highest aggregation tendency and electron mobility, and therefore achieves a highest power conversion efficiency of 7.1%.

Keywords: high mobility; reduced intramolecular twisting; small-molecular acceptors; structural-property relationships; twisted 3D structures.