White Light Generation from 2,3-Dibutoxy-1,4-poly(phenylene vinylene)-CdSe/ZnS Quantum Dot–InGaN/GaN Quantum Well Dual Hybrid Light-Emitting Diodes
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概要
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In this paper, we have demonstrated fabrication and characterization of 2,3-dibutoxy-1,4-poly(phenylene vinylene) (DBPPV)-CdSe/ZnS core/shell quantum dots (QDs)–InGaN/GaN quantum wells (QWs) hybrid white light-emitting diodes (WLEDs). With appropriately adjusting the amount of red-emitting QDs and yellowish green-emitting polymer precoated on a blue light-emitting chip, pure white light from the device can be generated. White light with Commission Internationale de l’Eclairage (CIE) chromaticity coordinates of $(0.33,0.34)$, color rendering index (CRI) of 76 and correlated color temperature (CCT) of 5600 K is characterized. As the WLED is operated at 20 mA, the luminous flux of 0.55 lm and luminous efficacy of 330 lm/W are obtained. Besides, with injection current increasing from 10 to 60 mA, the CCT and CRI are decreased by 5 and 17%, respectively. The divergence angle (the full angle at $1/e$ intensity) of the WLED is measured as 98°.
- 2009-04-25
著者
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Su Yan-kuin
Advanced Optoelectronic Technology Center Institute Of Microelectronics Department Of Electrical Eng
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Huang Chun-Yuan
Advanced Optoelectronic Technology Center, Institute of Microelectronics and Department of Electrical Engineering, National Cheng Kung University, No. 1, Dasyue Rd., East District, Tainan 701, Taiwan
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Chen Ying-Chih
Advanced Optoelectronic Technology Center, Institute of Microelectronics and Department of Electrical Engineering, National Cheng Kung University, No. 1, Dasyue Rd., East District, Tainan 701, Taiwan
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Yeh Chia-Hsien
The Department of Engineering Science, National Cheng Kung University, No. 1, Dasyue Rd., East District, Tainan 701, Taiwan
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Lin Yu-Cheng
The Department of Engineering Science, National Cheng Kung University, No. 1, Dasyue Rd., East District, Tainan 701, Taiwan
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Su Yan-Kuin
Advanced Optoelectronic Technology Center, Institute of Microelectronics and Department of Electrical Engineering, National Cheng Kung University, No. 1, Dasyue Rd., East District, Tainan 701, Taiwan
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