The Influence of the Thermal Effect on CdSe/ZnS Quantum Dots in Light-Emitting Diodes

被引：63

作者：

Chen, Kuo-Ju ^{[1
,2
]}

Chen, Hsin-Chu ^{[1
,2
]}

Shih, Min-Hsiung ^{[1
,2
,3
]}

Wang, Chao-Hsun ^{[1
,2
]}

Kuo, Ming-Yen ^{[3
]}

Yang, Yi-Chun ^{[3
]}

Lin, Chien-Chung ^{[4
]}

Kuo, Hao-Chung ^{[1
,2
]}

机构：

[1] Natl Chiao Tung Univ, Dept Photon, Hsinchu 30010, Taiwan

[2] Natl Chiao Tung Univ, Inst Electroopt Engn, Hsinchu 30010, Taiwan

[3] Res Ctr Appl Sci, Taipei 115, Taiwan

[4] Natl Chiao Tung Univ, Inst Photon Syst, Tainan 711, Taiwan

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2012年 / 30卷 / 14期

关键词：

Light-emitting diodes (LEDs); GaN; quantum dots (QDs); phosphor; PHOSPHOR; EFFICIENCY; PHOTOLUMINESCENCE; NANOCRYSTALS; EMISSION; LAYERS;

D O I：

10.1109/JLT.2012.2195158

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

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.

引用

页码：2256 / 2261

页数：6

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