Air-Hybrid Distributed Bragg Reflector Structure for Improving the Light Output Power in AlGalnP-Based LEDs
| Autor: | Young Dae Cho, Young-Jin Kim, Hwa Sub Oh, Joon Seop Kwak, Tak Jeong, Hyung Joo Lee, Sueng Ho Park, Jong Hyeob Baek, Ho-Soung Ryu |
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| Rok vydání: | 2015 |
| Předmět: |
Brightness
Materials science business.industry Light extraction in LEDs Biomedical Engineering Bioengineering Nanotechnology General Chemistry Condensed Matter Physics Distributed Bragg reflector Ray law.invention law Optoelectronics General Materials Science business Air gap (plumbing) Light-emitting diode |
| Zdroj: | Journal of nanoscience and nanotechnology. 15(7) |
| ISSN: | 1533-4899 |
| Popis: | We investigated air gap-induced hybrid distributed Bragg reflectors (AH-DBRs) for use in high brightness and reliable AlGalnP-based light emitting diodes (LEDs). An air gap was inserted into the side of DBRs by selectively etching the Al(x),Ga1-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. |
| Databáze: | OpenAIRE |
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