使用量子点纳米磷光体的白色发光二极管的最佳光谱

Optimal spectra of white light-emitting diodes using quantum dot nanophosphors.

作者信息

Zhong Ping, He Guoxing, Zhang Minhao

机构信息

Department of Applied Physics, Dong Hua University, 1882 Yan’an Road (W), Shanghai 200051, China.

出版信息

Opt Express. 2012 Apr 9;20(8):9122-34. doi: 10.1364/OE.20.009122.

DOI:10.1364/OE.20.009122

PMID:22513623

Abstract

The relationship and trade-offs between the performance parameters including color rendering index (CRI), luminous efficacy of radiation (LER) and correlated color temperature (CCT) of white LEDs using quantum dot nanophosphors (QD-WLEDs) are investigated for CRI ≥ 80 and LER ≥ 300 lm/W at 1500 K ≤ CCT ≤ 6500 K. The optimal spectra of QD-WLEDs with CCTs of 2700-6500 K have been obtained with a nonlinear program for maximizing LER under conditions of both CRI and a special CRI of R9 strong red above 90 or 95. Furthermore, high performance QD-WLEDs with LER = 381 lm/W for CRI = R9 = 90 and LER = 371 lm/W for CRI = R9 = 95 at CCT = 3000 K, with LER = 361 lm/W for CRI = R9 = 90 and LER = 352 lm/W for CRI = R9 = 95 at CCT = 4500 K, and with LER = 346 lm/W for CRI = R9 = 90 and LER = 338 lm/W for CRI = R9 = 95 at CCT = 5700 K could be achieved. The LERs of high performance white LEDs using QD nanophosphors increase by 13% to 32% compared with that of white LEDs using traditional phosphors.

摘要

对于量子点纳米磷光体白光发光二极管（QD-WLEDs），在显色指数（CRI）≥80、辐射发光效率（LER）≥300 lm/W且相关色温（CCT）在1500 K≤CCT≤6500 K的条件下，研究了包括CRI、LER和CCT在内的性能参数之间的关系和权衡。通过非线性程序，在CRI以及R9强红色特殊显色指数高于90或95的条件下，获得了CCT为2700 - 6500 K的QD-WLEDs的最佳光谱。此外，在CCT = 3000 K时，可实现CRI = R9 = 90且LER = 381 lm/W以及CRI = R9 = 95且LER = 371 lm/W的高性能QD-WLEDs；在CCT = 4500 K时，可实现CRI = R9 = 90且LER = 361 lm/W以及CRI = R9 = 95且LER = 352 lm/W的高性能QD-WLEDs；在CCT = 5700 K时，可实现CRI = R9 = 90且LER = 346 lm/W以及CRI = R9 = 95且LER = 338 lm/W的高性能QD-WLEDs。与使用传统磷光体的白光发光二极管相比，使用QD纳米磷光体的高性能白光发光二极管的LER提高了13%至32%。