Elevated Stability and Efficiency of Solar Cells via Ordered Alloy Co-Acceptors

被引：70
作者：
Zhao, Qiaoqiao [1 ,2 ]
Xiao, Zuo [3 ]
Qu, Jianfei [1 ,2 ]
Liu, Longzhu [1 ,2 ]
Richter, Henning [4 ]
Chen, Wei [5 ,6 ]
Han, Liang [1 ,2 ]
Wang, Meijing [1 ,2 ]
Zheng, Jieming [7 ]
Xie, Zengqi [7 ]
Ding, Liming [3 ]
He, Feng [1 ,2 ]
机构：
[1] Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Shenzhen 518055, Peoples R China
[2] Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Peoples R China
[3] Chinese Acad Sci, Key Lab Nanosyst & Hierarch Fabricat, Ctr Excellence Nanosci, Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China
[4] Nano C, 33 Southwest Pk, Westwood, MA 02090 USA
[5] Argonne Natl Lab, Mat Sci Div, 9700 Cass Ave, Lemont, IL 60439 USA
[6] Univ Chicago, Inst Mol Engn, 5640 South Ellis Ave, Chicago, IL 60637 USA
[7] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China
来源：
ACS ENERGY LETTERS | 2019年 / 4卷 / 05期
基金：
中国国家自然科学基金;
关键词：
SMALL-MOLECULE ACCEPTOR; POWER CONVERSION EFFICIENCY; ELECTRON-ACCEPTOR; POLYMER; PERFORMANCE; MOBILITY; CRYSTALLIZATION; PHOTOVOLTAICS; SENSITIZATION; OPTIMIZATION;
D O I：
10.1021/acsenergylett.9b00534
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Power conversion efficiency (PCE) and long-term stability are the two key parameters of photovoltaic devices to meet standards for commercial use. In this Letter, an ordered alloyed co-acceptor by incorporating PC61BM and CO(i)8DFIC is obtained. This ordered alloy structure increases the light absorption by producing a shoulder peak at 935 nm and improves electron mobility from 1.51 X 10(-5) to 8.91 X 10(-4) cm(2) V-1 s(-1) by PC61BM interacting with the end group of CO(i)8DFIC and connecting adjacent CO(i)8DFIC molecules. Consequently, the PCE is enhanced from 10.80 to 14.22%, enhancement of about 32%. Even further, the device stability is improved due to the fact that the alloy fixes the morphology of the active layer. After keeping for 7200 h, about 10 months, the PCE of those solar cells is retained at 13.2%, corresponding to a PCE loss of only 5.7%, while the PCE loss in the binary control device is up to 33.3%.
引用
收藏
页码：1106 / 1114
页数：17
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