Recombination lifetime of free polarons in polymer/fullerene bulk heterojunction solar cells

被引：19

作者：

Li, Kejia ^{[1
]}

Li, Lijun ^{[1
]}

Campbell, Joe C. ^{[1
]}

机构：

[1] Univ Virginia, Dept Elect & Comp Engn, Charlottesville, VA 22904 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 111卷 / 03期

关键词：

CARRIER MOBILITY; CHARGE; POLY(3-HEXYLTHIOPHENE); METHANOFULLERENE; AMBIPOLAR; FILMS;

D O I：

10.1063/1.3680879

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The recombination lifetime of free polarons was measured using three different methods: electrical field dependent photoresponse, transient photoconductivity, and forward-to-zero bias transient-current response. The average free polaron recombination lifetime is estimated to be a few microseconds for poly (3-hexylthiophene) (P3HT) and [6,6]-phenyl C61-butyric acid methyl ester (PCBM) solar cells. The competition between sweep-out by the internal field and the loss of photogenerated carriers by recombination is analyzed. The short-circuit free polaron collection efficiency for P3HT:PCBM bulk heterojunction material was determined to be in the range of 80% to 90%. (C) 2012 American Institute of Physics. [doi:10.1063/1.3680879]

引用

页数：6

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