Wide-range correlated color temperature light generation from resonant cavity hybrid quantum dot light-emitting diodes

Kuo Ju Chen, Chien-Chung Lin, Hau Vei Han, Chia Yu Lee, Shih Hsuan Chien, Kuan Yu Wang, Sheng Huan Chiu, Zong Yi Tu, Jie Ru Li, Teng-Ming Chen, Xiuling Li, Min Hsiung Shih, Hao-Chung Kuo

研究成果: Article同行評審

20 引文 斯高帕斯(Scopus)

摘要

This study presents extremely uniform colloidal quantum dot white light-emitting diodes (QD-WLEDs) that demonstrate a high color rendering index (CRI) and correlated color temperatures (CCTs) ranging from 2500 to 4500 K. Experimental results indicate that the structure of the distributed Bragg reflector (DBR) containing a stopband in the UV region enhances the intensity output of both monochromatic QD-LEDs and QD-WLEDs by reflecting the unconverted UV light back onto the package to excite the QDs further. Furthermore, the angular CCT uniformity of the QD-WLEDs also improved considerably because of the dependence of the DBR structure on the incident angle. The angular CCT deviation in the range of -70° to 70° decreased to 39 K and the CRI of the WLED is higher than 90. The high-CRI and uniform angular CCT QD-WLED containing the DBR demonstrates potential applicability as the lighting source of next-generation display devices and solid-state lighting.

原文English
文章編號7046267
期刊IEEE Journal on Selected Topics in Quantum Electronics
21
發行號4
DOIs
出版狀態Published - 1 七月 2015

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