Improving the performance of polymer solar cells by adjusting the crystallinity and nanoscale phase separation

被引：10
作者：
Chen, Wei-Bing [1 ,2 ,3 ]
Xu, Zong-Xiang [4 ]
Li, Kai [2 ,3 ]
Chui, Stephen Sin-Yin [2 ,3 ]
Roy, V. A. L. [4 ]
Lai, Pui-To [5 ]
Che, Chi-Ming [2 ,3 ]
机构：
[1] Hunan Univ Technol, Sch Comp & Commun, Zhuzhou 412007, Peoples R China
[2] Univ Hong Kong, Dept Chem, Inst Mol Funct Mat, Hong Kong, Hong Kong, Peoples R China
[3] Univ Hong Kong, HKU CAS Joint Lab New Mat, Hong Kong, Hong Kong, Peoples R China
[4] City Univ Hong Kong, Dept Phys & Math Sci, Kowloon, Hong Kong, Peoples R China
[5] Univ Hong Kong, Dept Elect & Elect Engn, Hong Kong, Hong Kong, Peoples R China
来源：
CHINESE PHYSICS B | 2012年 / 21卷 / 07期
基金：
中国国家自然科学基金;
关键词：
crystallinity; polymer solar cell; ultrasonic irradiation; nanoscale phase separation; PHOTOVOLTAIC CELLS; SELF-ORGANIZATION; EFFICIENCY; FILMS;
D O I：
10.1088/1674-1056/21/7/078401
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this paper, we report a high-performance P3HT/PCBM bulk-heterojunction solar cell with a power conversion efficiency of 4.85% fabricated by adjusting the polymer crystallinity and nanoscale phase separation using an ultrasonic irradiation mixing approach for the polymer. The grazing incidence X-ray diffraction, UV/Vis spectroscopic, and atomic force microscopic measurement results for the P3HT/PCBM blend films reveal that the P3HT/PCBM film fabricated by ultrasonic irradiation mixing of the P3HT and PCBM solutions for 10 min has a higher degree of crystallinity, a higher absorption efficiency, and better phase separation, which together account for the higher charge transport properties and photovoltaic cell performance.
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页数：6
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