Enhanced electron extraction capability of polymer solar cells via modifying the cathode buffer layer with inorganic quantum dots

被引：8
|
作者：
Li, Zhiqi [1 ]
Li, Shujun [1 ]
Zhang, Zhihui [1 ]
Zhang, Xinyuan [1 ]
Li, Jingfeng [1 ]
Liu, Chunyu [1 ]
Shen, Liang [1 ,2 ,3 ]
Guo, Wenbin [1 ]
Ruan, Shengping [1 ]
机构：
[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, 2699 Qianjin St, Changchun 130012, Peoples R China
[2] Univ Nebraska, Dept Mech & Mat Engn, Lincoln, NE 68588 USA
[3] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2016年 / 18卷 / 16期
关键词：
CARRIER MOBILITY; FILL FACTOR; NANOPARTICLES; RECOMBINATION; EFFICIENCY; PHOTOVOLTAICS; SPECTROSCOPY; PERFORMANCE; COLLECTION; VOLTAGE;
D O I：
10.1039/c6cp00989a
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：
Enhanced performance of polymer solar cells (PSCs) based on the blend of poly[N-9''-hepta-decanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)] (PCDTBT):[6,6]-phenyl-C-70-butyric acid methyl ester (PC71BM) is demonstrated by titanium dioxide (TiO2) interface modification via CuInS2/ZnS quantum dots (CZdots). Devices with a TiO2/CZdots composite buffer layer exhibit both a high short-circuit current density (J(sc)) and fill factor (FF), leading to a power conversion efficiency (PCE) up to 7.01%. The charge transport recombination mechanisms are investigated by an impedance behavior model, which indicates that TiO2 interfacial modification results in not only increasing the electron extraction but also reducing impedance. This study provides an important and beneficial approach to develop high efficiency PSCs.
引用
收藏
页码：11435 / 11442
页数：8
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