Air-Hybrid Distributed Bragg Reflector Structure for Improving the Light Output Power in AlGaInP-Based LEDs

作者：Oh Hwa Sub; Ryu Ho Soung; Park Sueng Ho; Jeong Tak; Kim Young Jin; Lee Hyung Joo; Cho Young Dae; Kwak Joon Seop; Baek Jong Hyeob^*

来源：Journal of Nanoscience and Nanotechnology, 2015, 15(7): 5048-5051.

DOI：10.1166/jnn.2015.10355

• Air-Gap
• Distributed Bragg Reflector
• AlGaInP
• Light Emitting Diode

We investigated air gap-induced hybrid distributed Bragg reflectors (AH-DBRs) for use in high brightness and reliable AlGaInP-based light emitting diodes (LEDs). An air gap was inserted into the side of DBRs by selectively etching the AlxGa1-xAs DBR structures. With the AH-DBR structures, the optical output power of LEDs was enhanced by 15% compared to LEDs having conventional DBRs, due to the effective reflection of obliquely incident light by the air gap structures. In addition, the electrical characteristics showed that the AH-DBR LED is a desirable structure for reducing the leakage current, as it suppresses unwanted surface recombinations.

• 出版日期2015-7