Enhanced Light Output in InGaN-Based Light-Emitting Diodes with Omnidirectional One-Dimensional Photonic Crystals

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概要

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• We have successfully designed and fabricated GaN-based light-emitting diodes (LEDs) containing an omnidirectional one-dimensional photonic crystal (1D PC). The 1D PC is composed of alternatively stacked TiO2 and SiO2 layers designed to possess a photonic band gap (PBG) within the blue regime of interest. With the same multiple quantum well (MQW) emission peak at approximately 450 nm and a driving current of 20 mA, the light output powers of the LED with and without the 1D PC are approximately 11.7 and 6.5 mW, respectively. The enhancement in light extraction of our LED with 1D PC demonstrates that a properly designed omnidirectional 1D PC can have a higher reflectance and a wider reflection angle than a conventional distributed Bragg reflector (DBR). Our work shows promising potential for the enhancement of output powers of commercial light emitting devices.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2006-03-15

著者

• Kuo Hao-chung

  Department Of Photonic And Institute Of Electro-optical Engineering National Chiao Tung University

• KAO Chih-Chiang

  Department of Photonics & Institute of Electro-Optical Engineering, National Chiao Tung University

• Yu Chang-Chin

  Highlink Corporation, Hsinchu 300 Taiwan, R.O.C.

• Yu Chang-Chin

  HighLink Technology Corporation, ChuNan 350, Taiwan, R.O.C.

• Lin Chung-Hsiang

  Department of Photonics & Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan, R.O.C.

• Tsai Jui-Yen

  HighLink Technology Corporation, ChuNan 350, Taiwan, R.O.C.

• Lo Jun-Ren

  HighLink Technology Corporation, ChuNan 350, Taiwan, R.O.C.

• Leung Kok-Ming

  Department of Computer and Information Science, Polytechnic University, Six Metrotech Center, Brooklyn, NY 11201, U.S.A.

• Lin Chung-Hsiang

  Department of Photonics & Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan, R.O.C.

• Kao Chih-Chiang

  Department of Photonics & Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan, R.O.C.

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