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Strongly enhanced phosphor efficiency in GaInN white light-emitting diodes using remote phosphor configuration and diffuse reflector cup SCIE SCOPUS
- Title
- Strongly enhanced phosphor efficiency in GaInN white light-emitting diodes using remote phosphor configuration and diffuse reflector cup
- Date Issued
- 2005-01
- Publisher
- INST PURE APPLIED PHYSICS
- Abstract
- Enhancement of phosphor efficiency is reported for GaInN-based white light-emitting diodes (LEDs) employing a large separation between the primary LED emitter and the wavelength converter, and a diffuse reflector cup. Ray-tracing simulations show that extraction efficiency of wavelength-converted light is enhanced by 75%. The experimental improvement in phosphor efficiency of blue-pumped yellow phosphor is 15.4% compared with conventional phosphor-based white LEDs. The improvement is attributed to reduced re-absorption of wavelength-converted light by the LED chip.
- Keywords
- light-emitting diodes; GaN; diffuse reflector; encapsulant; phosphor
- ISSN
- 0021-4922
- Article Type
- Article
- Citation
- JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, vol. 44, no. 20-23, page. L649 - L651, 2005-01
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Related Researcher
- 김종규KIM, JONG KYU
- Dept of Materials Science & Enginrg