Charge recombination dynamics in a polymer/fullerene bulk heterojunction studied by transient absorption spectroscopy

被引：5

作者：

Nogueira, AF ^{[1
]}

Montanari, I

Nelson, J

Winder, C

Sariciftci, NS

Brabec, C

Durrant, JR

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem, Ctr Elect Mat & Devices, London SW7 2AY, England

[2] Univ London Imperial Coll Sci Technol & Med, Dept Phys, Ctr Elect Mat & Devices, London SW7 2AY, England

[3] Johannes Kepler Univ, Linz Inst Organ Solar Cells LIOS, A-4040 Linz, Austria

[4] SIEMENS AG CT MMI, Innovat Elect, D-91052 Erlangen, Germany

来源：

SYNTHETIC METALS | 2003年 / 137卷 / 1-3期

关键词：

conducting polymer; fullerene; solar cells; photoinduced absorption spectroscopy; charge recombination; power dependence;

D O I：

10.1016/S0379-6779(02)01204-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The recombination kinetics of long-lived photogenerated charge carriers are investigated by transient absorption spectroscopy on nano- to millisecond time scales in a composite of poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-1-4-phenylene vinylene], (MDMO-PPV) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C-61 (PCBM) at room temperature. The decay dynamics of the positive polarons, attributed to recombination with PCBM anions, were found to be either monophasic or biphasic. dependent upon the laser excitation density. The slower decay phase is assigned to recombination dynamics of localized polarons while the fast component (<20 ns) is assigned to the recombination of mobile polarons when the density of photogenerated polarons is higher than the available density of localized states (similar to10(17)cm(-3)).

引用

页码：1505 / 1506

页数：2

共 5 条

[1] Investigation of photoexcitations of conjugated polymer/fullerene composites embedded in conventional polymers [J].