Photocurrent Transients in Polymer-fullerene Bulk Heterojunction Organic Solar Cells

被引：0

作者：

Li, Lijun ^{[1
]}

Li, Kejia ^{[1
]}

Khlyabich, Petr P. ^{[2
,3
]}

Burkhart, Beate ^{[2
,3
]}

Thompson, Barry C. ^{[2
,3
]}

Campbell, Joe C. ^{[1
,3
]}

机构：

[1] Univ Virginia, Dept Elect & Comp Engn, Charlottesville, VA 22903 USA

[2] Univ Southern Calif, Dept Chem, Los Angeles, CA 90089 USA

[3] Univ Southern Calif, Ctr Energy Nanosci, Los Angeles, CA 90089 USA

来源：

2012 38TH IEEE PHOTOVOLTAIC SPECIALISTS CONFERENCE (PVSC) | 2012年

关键词：

organic semiconductors; charge carrier lifetime; photovoltaic cells; polymer films; DEPENDENCE; MOBILITY;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

By measuring the transient photocurrents we study the charge carrier dynamics in regioregular poly(3-hexylthiophene) (P3HT): 6,6-phenyl-C61-butyric acid methyl ester (PCBM), and poly(3-hexylthiophene) thiophene thienopyrazine (P3HTT-TP):PCBM bulk heterojunction (BHJ) solar cells. The latter is based on a novel "semi-random" copolymer and exhibits broad spectral absorption. We observe that the charge carrier transport in P3HTT-TP:PCBM is more imbalanced than that of P3HT:PCBM. Voltage dependent photocurrent transients indicate that P3HT:PCBM has longer carrier lifetimes than P3HTTTP:PCBM. Light intensity dependent open-circuit voltage measurements show stronger monomolecular recombination in P3HTT-TP:PCBM. The unfavorable charge carrier transport may be one of the reasons for the low power conversion efficiency of P3HTT-TP:PCBM BHJ solar cells.

引用

页码：2756 / 2760

页数：5

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