Spin-dependent delayed luminescence from nongeminate pairs of polarons in π-conjugated polymers -: art. no. 241201

被引：49
|
作者：
Wohlgenannt, M [1 ]
Yang, C
Vardeny, ZV
机构：
[1] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA
[2] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA
来源：
PHYSICAL REVIEW B | 2002年 / 66卷 / 24期
关键词：
D O I：
10.1103/PhysRevB.66.241201
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We measured cw photoinduced absorption (PA) and spin-1/2PA- and photoluminescence detected magnetic resonance (PADMR and PLDMR, respectively) in films of two representative pi-conjugated polymers; poly(phenylene-vinylene) and polythiophene. From the dependences of the polaron PA and PLDMR on the laser excitation intensity we conclude that the PLDMR is due to spin-dependent delayed luminescence from nongeminate pairs of polarons. Our findings imply that spin-dependent exciton formation in polymer light-emitting diodes leads to enhanced emission efficiency.
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页码：1 / 4
页数：4
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