DataVXAdvanced MaterialsPaper
journal article·2017-11Open access

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

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

Advanced Materials· Volume 29· Issue 42
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Source abstract

Abstract

Abstract An all‐small‐molecule ternary solar cell is achieved with a power conversion efficiency of 10.48% by incorporating phenyl‐C71‐butyric‐acid‐methyl ester (PC71BM) into a nonfullerene binary system. The addition of PC71BM 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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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Nanowire Synthesis and Applications

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Affiliations

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

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Chinese Academy of Sciences · U.S. Department of Energy

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