Premium
Improved Domain Size and Purity Enables Efficient All‐Small‐Molecule Ternary Solar Cells
Author(s) -
Zhang Hao,
Wang Xiaohui,
Yang Liyan,
Zhang Shaoqing,
Zhang Yun,
He Chang,
Ma Wei,
Hou Jianhui
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201703777
Subject(s) - ternary operation , materials science , energy conversion efficiency , small molecule , modulation (music) , molecule , domain (mathematical analysis) , solar cell , ternary numeral system , optoelectronics , nanotechnology , organic chemistry , chemistry , mathematical analysis , biochemistry , philosophy , mathematics , computer science , programming language , aesthetics
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.