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

被引：53

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

页码：963 / 969

页数：7

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