Substrate thermal conductivity effect on heat dissipation and lifetime improvement of organic light-emitting diodes

Seungjun Chung; Jae-Hyun Lee; Jaewook Jeong; Jang-Joo Kim; Yongtaek Hong
June 2009
Applied Physics Letters;6/22/2009, Vol. 94 Issue 25, p253302
Academic Journal
We report substrate thermal conductivity effect on heat dissipation and lifetime improvement of organic light-emitting diodes (OLEDs). Heat dissipation behavior of top-emission OLEDs fabricated on silicon, glass, and planarized stainless steel substrates was measured by using an infrared camera. Peak temperature measured from the backside of each substrate was saturated to be 21.4, 64.5, and 40.5 °C, 180 s after the OLED was operated at luminance of 10 000 cd/m2 and 80% luminance lifetime was about 198, 31, and 96 h, respectively. Efficient heat dissipation through the highly thermally conductive substrates reduced temperature increase, resulting in much improved OLED lifetime.


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