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题目:

Efficient inverted polymer solar cells incorporating doped organic electron transporting layer

 

 

作者:

Zai-Quan Xu a, Jin-Peng Yang a, Fu-Zhou Sun a, Shuit-Tong Lee b, Yan-Qing Li a,*, Jian-Xin Tang a,*

 

 

单位:

a Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China

b Center of Super-Diamond and Advanced Films (COSDAF), Department of Physics and Materials Science, City University of Hong Kong, Hong Kong Special Administrative Region

 

 

摘要:

An efficient inverted polymer solar cell is enabled by incorporating an n-type doped wide-gap organic electron transporting layer (ETL) between the indium tin oxide cathode and the photoactive layer for electron extraction. The ETL is formed by a thermal-deposited cesium carbonate-doped 4,7-diphenyl-1,10-phenanthroline (Cs2CO3:BPhen) layer. The cell response parameters critically depended on the doping concentration and film thickness of the Cs2CO3:BPhen ETL. Inverted polymer solar cell with an optimized Cs2CO3:BPhen ETL exhibits a power conversion efficiency of 4.12% as compared to 1.34% for the device with a pristine BPhen ETL. The enhanced performance in the inverted device is associated with the favorable energy level alignment between Cs2CO3:BPhen and the electron-acceptor material, as well as increased conductivity in the doped organic ETL for electron extraction. The method reported here provides a facile approach to optimize the performance of inverted polymer solar cells in terms of easy control of film morphology, chemical composition, conductivity at low processing temperature, as well as compatibility with fabrication on flexible substrates.

 

 

影响因子:

4.029

 

 

分区情况:

1


 

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