| Citation: |
Bao Kui, Zhang Bei, Dai Tao, Kang Xiangning, Chen Zhizhong, Wang Zhimin, Chen Yong. Enhancement of Light Extraction from Microstructured GaN-Based Light Emitting Diodes by Technique of Nanoimprint。[J]. Journal of Semiconductors, 2007, In Press.
Bao K, Zhang B, Dai T, Kang X N, Chen Z Z, Wang Z M, Chen Y. Enhancement of Light Extraction from Microstructured GaN-Based Light Emitting Diodes by Technique of Nanoimprint。[J]. Chin. J. Semicond., 2007, 28(S1): 464.
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Enhancement of Light Extraction from Microstructured GaN-Based Light Emitting Diodes by Technique of Nanoimprint。
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Abstract
To further improve surface light extraction from flip·chip GaN·based LED·the patterning of two-dimensional (2D)microstructural arrays on the top of the LED was proposed in this report.Based on this proposal，the novel LEDs COV· ered by thin encapsulations with microstructure·arrays were successfully fabricated by employing the nanoimprint technique of embossing of thermosetting polymers. As a result。a clear enhancement of surface light extraction was obtained in the LEDs with encaDsulations of micro-arrays.A 60％improvement of light output was achieved on these 1ram×lmm GaN based LEDs under injection current of 350mA.Consequently。this work provides an available and simplified approach to increase the extraction efficiency of LEDs. -
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