Light extraction from electroluminescent devices using micro-rod array embedded within glass substrate | Zendy

Yijun Wang | Zendy; Shihong Ouyang | Zendy; Jiangang Lü | Zendy; HanPing D. Shieh | Zendy

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Light extraction from electroluminescent devices using micro-rod array embedded within glass substrate

Author(s) -

Yijun Wang,

Shihong Ouyang,

Jiangang Lü,

HanPing D. Shieh

Publication year - 2015

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.23.00a819

Subject(s) - electroluminescence , materials science , optoelectronics , light emitting diode , optics , fabrication , femtosecond , diode , substrate (aquarium) , coupling (piping) , laser , total internal reflection , nanotechnology , layer (electronics) , medicine , oceanography , physics , alternative medicine , pathology , geology , metallurgy

The total internal reflection (TIR) effect in conventional electroluminescent devices causes a large amount of light energy trapped in the devices and result in heat energy that adversely affects the performance of the device. In order to enhance the light out-coupling efficiency without sacrificing the electrical properties, a micro-rod array (MRA) structure fabricated by a femtosecond laser was demonstrated. Green, blue, and red organic light-emitting diodes were employed to verify the effect of the proposed method, which increases out-coupling efficiencies by a factor of 1.9, 1.7, and 1.82, respectively, compared with conventional devices. This highly effective method is compatible with current device fabrication processes and is applicable to full-color electroluminescent devices.

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