Frequency up-conversion as a temperature probe of organic opto-electronic devices

被引：25

作者：

Lupton, JM ^{[1
]}

机构：

[1] Max Planck Inst Polymer Res, D-55128 Mainz, Germany

来源：

APPLIED PHYSICS LETTERS | 2002年 / 80卷 / 02期

关键词：

D O I：

10.1063/1.1432766

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Frequency up-conversion is demonstrated in a polyfluorene-based conjugated polymer. Up-converted emission is observed upon excitation to the red of the 0-0 luminescence band. The emission intensity depends strongly on temperature and provides an accurate probe of the operating temperature of organic light-emitting diodes. Temperature rises of up to 30 K are observed at standard operating current densities of 225 mA/cm(2). Due to the low thermal conductivity and heat capacity of the polymer film, the temperature of the film is found to rise slowly on a time-scale of seconds. Upon termination of the current, the temperature decreases again on a time-scale of minutes. (C) 2002 American Institute of Physics.

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页码：186 / 188

页数：3

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