Improved Domain Size and Purity Enables Efficient All‐Small‐Molecule Ternary Solar Cells

Zhang, Hao; Wang, Xiaohui; Yang, Liyan; Zhang, Shaoqing; Zhang, Yun; He, Chang; Ma, Wei; Hou, Jianhui

doi:10.1002/adma.201703777

Title: Improved Domain Size and Purity Enables Efficient All‐Small‐Molecule Ternary Solar Cells

Journal Article · Fri Sep 29 00:00:00 EDT 2017 · Advanced Materials

DOI:https://doi.org/10.1002/adma.201703777· OSTI ID:1395600

^[1]; Wang, Xiaohui ^[2]; Yang, Liyan ^[1]; Zhang, Shaoqing ^[3]; Zhang, Yun ^[1];

^[1];

^[2];

^[1]

State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China, School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China
State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 P. R. China
State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

Abstract An all‐small‐molecule ternary solar cell is achieved with a power conversion efficiency of 10.48% by incorporating phenyl‐C ₇₁ ‐butyric‐acid‐methyl ester (PC ₇₁ BM) into a nonfullerene binary system. The addition of PC ₇₁ BM is found to modulate the film morphology by improving the domain purity and decreasing the domain size. This modulation facilitates charge generation and suppresses charge recombination, as manifested by the significantly enhanced short‐circuit current density and fill factor. The results correlate the domain characteristics with the device performance and offer new insight from the perspective of morphology modulation for constructing efficient ternary devices.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: DE‐AC02‐05CH11231

OSTI ID:: 1395600

Journal Information:: Advanced Materials, Journal Name: Advanced Materials Vol. 29 Journal Issue: 42; ISSN 0935-9648

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

Country of Publication:: Germany

Language:: English

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Cited by: 83 works

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