Tunable magneto-conductance and magneto-electroluminescence in polymer light-emitting electrochemical planar devices

被引:8
|
作者
Geng, R. [1 ]
Mayhew, N. T. [1 ]
Nguyen, T. D. [1 ]
机构
[1] Univ Georgia, Dept Phys & Astron, Athens, GA 30602 USA
关键词
ROOM-TEMPERATURE; ORGANIC SEMICONDUCTORS; SANDWICH DEVICES; MAGNETORESISTANCE; HYPERFINE; FILMS;
D O I
10.1063/1.4841776
中图分类号
O59 [应用物理学];
学科分类号
摘要
We report studies of magneto-conductance (MC) and magneto-electroluminescence (MEL) in polymer light-emitting electrochemical planar devices using "super-yellow" poly-(phenylene vinylene). We observed consistent negative MC while MEL becomes positive when electroluminescence quantum efficiency (ELQE) increases. At an optimal ELQE, the MC has a much narrower width than the MEL, indicating that the MC and MEL do not share a common origin. However, MC reverses and has the same width as MEL when exposed to a threshold laser power. We show that the e-h pair model can explain the positive MEL and MC while the negative MC can be explained by the bipolaron model. (C) 2013 AIP Publishing LLC.
引用
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页数:5
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