Wide-Range Correlated Color Temperature Light Generation From Resonant Cavity Hybrid Quantum Dot Light-Emitting Diodes

Autor:	Hau-Vei Han, Chia-Yu Lee, Jie-Ru Li, Sheng-Huan Chiu, Chien-Chung Lin, Shih-Hsuan Chien, Teng-Ming Chen, Hao-Chung Kuo, Zong-Yi Tu, Kuan-Yu Wang, Min-Hsiung Shih, Kuo-Ju Chen, Xiuling Li
Rok vydání:	2015
Předmět:	Materials science business.industry Stopband Color temperature Distributed Bragg reflector Atomic and Molecular Physics and Optics law.invention Color rendering index Optics law Quantum dot Optoelectronics Monochromatic color Electrical and Electronic Engineering business Light-emitting diode Diode
Zdroj:	IEEE Journal of Selected Topics in Quantum Electronics. 21:23-29
ISSN:	1558-4542 1077-260X
DOI:	10.1109/jstqe.2015.2404877
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e58dd383b2ecd962984c4658151ba623 https://doi.org/10.1109/jstqe.2015.2404877 Zobrazit plný text záznamu