期刊
NANO ENERGY
卷 59, 期 -, 页码 277-284出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2019.02.046
关键词
All-polymer organic solar cells; Blade-coating; Mechanical property; Molecular packing
类别
资金
- Ministry of Science and Technology [2016YFA0200700]
- NSFC [21504066, 21534003, 21875182, 21704082]
- China Postdoctoral Science Foundation [2017M623162]
- State Key Laboratory of Luminescent Materials and Devices of South China University of Technology
- Open Research Fund of State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences [201629]
- Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DEAC02-05CH11231]
All-polymer solar cells (all-PSCs) are the most promising power generators for flexible and portable devices due to excellent morphology stability and outstanding mechanical property. Previous work indicates high crystallinity is beneficial to device performance but detrimental to mechanical property, therefore identifying the optimized ratio between crystalline and amorphous domains becomes important. In this work, we demonstrated highly efficient and mechanically robust all-PSCs by blade-coating technology in ambient environment based on PTzBI:N2200 system. By controlling the aggregation in solution state and ultrafast film formation process, a weakly ordered molecular packing morphology as well as small phase separation is obtained, which leads to not only the good photovoltaic performance (8.36%-one of the best blade-cast device in air) but also prominent mechanical characteristic. The controlled film shows a remarkable elongation with the crack onset strain of 15.6%, which is the highest result in organic solar cells without adding elastomers. These observations indicate the great promise of the developed all-PSCs for practical applications toward large-area processing technology.
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