標題: The Influence of the Thermal Effect on CdSe/ZnS Quantum Dots in Light-Emitting Diodes
作者: Chen, Kuo-Ju
Chen, Hsin-Chu
Shih, Min-Hsiung
Wang, Chao-Hsun
Kuo, Ming-Yen
Yang, Yi-Chun
Lin, Chien-Chung
Kuo, Hao-Chung
光電工程學系
Department of Photonics
關鍵字: Light-emitting diodes (LEDs);GaN;quantum dots (QDs);phosphor
公開日期: 15-Jul-2012
摘要: This study investigates the effect of temperature on CdSe/ZnS quantum dots (QDs) in GaN-based light-emitting diodes (LEDs) using the phosphor conversion efficiency (PCE) and LED junction temperature. In our simulation, the blue chip and CdSe/ZnS QDs temperature are similar because of their minimal thickness. Furthermore, to verify the effect of temperature on CdSe/ZnS QDs, we use continuous wave and pulsed current sources to measure the relationship between the temperature and relative PCE. Higher junction temperatures are observed with greater CdSe/ZnS QD volume in LEDs. This is attributed to the thermal conduction and nonradiative energy between CdSe/ZnS QDs and blue chip. Therefore, if thermal management is improved, CdSe/ZnS QDs are expected to be used as color converting material in LEDs.
URI: http://hdl.handle.net/11536/16248
ISSN: 0733-8724
期刊: JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume: 30
Issue: 14
結束頁: 2256
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