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

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...

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Bibliographic Details
Published in:Beilstein journal of nanotechnology 2018-05, Vol.9 (1), p.1602-1612
Main Authors: 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-Chen
Format: Article
Language:English
Subjects:
Acids
Aluminum oxide
Angle of reflection
anodic aluminum oxide
Arrays
Critical angle
critical angle of total reflection
Efficiency
efficiency enhancement
Emitters
flip-chip blue light-emitting diode
Full Research Paper
Laser etching
Light emitting diodes
Nanoscience
Nanotechnology
Organic chemicals
Organic light emitting diodes
Photonics
Porosity
Scanning electron microscopy
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Summary: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.
ISSN:2190-4286
2190-4286
DOI:10.3762/bjnano.9.152