Charge Carrier Dynamics in Metalated Polymers Investigated by Optical-Pump Terahertz-Probe Spectroscopy

被引：26

作者：

Cunningham, Paul D. ^{[1
]}

Hayden, L. Michael ^{[1
]}

Yip, Hin-Lap ^{[2
]}

Jen, Alex K. -Y. ^{[2
]}

机构：

[1] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA

[2] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2009年 / 113卷 / 47期

基金：

美国国家科学基金会;

关键词：

ALTERNATING POLYFLUORENE COPOLYMER; HETEROJUNCTION SOLAR-CELLS; CONJUGATED POLYMERS; EFFICIENCY; POLY(3-HEXYLTHIOPHENE); MOBILITY; GENERATION; PULSES; AIR;

D O I：

10.1021/jp906454g

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：

We report charge carrier dynamics in solid films of a series of metalated polymers based on Pt- and 4,7-di-2'-thienyl-2,1,3,-benzothiadiazole or 4,7-di-2'-thieiiothienyl-2,1,3,-benzothiadiazole upon photoexcitation of the pi-pi* transition using optical-pump terahertz-probe spectroscopy. Subpicosecond generated charge carriers recombine within 100 ps, but bound excitons persist. Application of the Drude-Smith model allows for estimation of the intrinsic mobility and internal quantum yield of charge carrier generation in these films. Thermal annealing is found to have no effect on nanometer scale charge transport.

引用

页码：15427 / 15432

页数：6

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