Photo-Carrier Recombination in Polymer Solar Cells Based on P3HT and Silole-Based Copolymer

被引：54
|
作者：
Chen, Song [2 ]
Choudhury, Kaushik Roy [2 ]
Subbiah, Jegadesan [2 ]
Amb, Chad M. [1 ]
Reynolds, John R. [1 ]
So, Franky [2 ]
机构：
[1] Univ Florida, Dept Chem, George & Josephine Butler Polymer Res Lab, Ctr Macromol Sci & Engn, Gainesville, FL 32611 USA
[2] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA
来源：
ADVANCED ENERGY MATERIALS | 2011年 / 1卷 / 05期
关键词：
CHARGE-TRANSPORT; PHOTOCURRENT GENERATION; ELECTRON-TRANSFER; PERFORMANCE; EFFICIENCY; SILICON;
D O I：
10.1002/aenm.201100300
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：
Photo-current loss in donor-acceptor (DA) polymer-fullerene bulk heterojunction solar cells was studied via carrier transport and recombination measurements. Focusing on the DA polymer poly((4,4-dioctyldithieno (3,2-b:2',3'-d) silole)-2,6-diyl-alt-(2,1,3-benzothiadiazole)-4,7-diyl) (DTS-BTD) we found that the carrier transport is well-balanced and attribute the loss mechanism in DTS-BTD solar cells to carrier recombination. Using carrier extraction with linear increasing voltage (photo-CELIV) and transient photo-voltage (TPV), we show that carrier recombination plays an important role in photo-current extraction at open circuit conditions due to increase in photo-excited carrier concentration. Delay time dependent photo-CELIV and temperature dependent transport studies suggest that the recombination rate is related to the degree of energetic disorder in the polymer: fullerene blends.
引用
收藏
页码：963 / 969
页数：7
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