Light extraction efficiency enhancement of flip-chip blue light-emitting diodes by anodic aluminum oxide

Author:

Huang Yi-Ru,Chiu Yao-Ching,Huang Kuan-Chieh,Ting Shao-Ying,Chiang Po-Jui,Lai Chih-Ming,Jen Chun-Ping,Tseng Snow H,Wang Hsiang-ChenORCID

Abstract

We produced an anodic aluminum oxide (AAO) structure with periodic nanopores on the surface of flip-chip blue light-emitting diodes (FC-BLEDs). The nanopores had diameters ranging from 73 to 85 nm and were separated by distances ranging from approximately 10 to 15 nm. The light extraction efficiency enhancement of the FC-BLEDs subjected to different durations of the second pore-widening process was approximately 1.6–2.9%. The efficiency enhancement may be attributed to the following mechanism: periodic nanopores on the surface of FC-BLEDs reduce the critical angle of total reflection and effective energy transfer from a light emitter into a surface plasmon mode produced by AAO.

Publisher

Beilstein Institut

Subject

Electrical and Electronic Engineering,General Physics and Astronomy,General Materials Science

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