High color rendering index of warm WLED based on LuAG: Ce3+ PiG coated CaAlSiN3: Eu2+ phosphor film for residential lighting applications

• Published in: Journal of materials science. Materials in electronics Vol. 29; no. 10; pp. 8767 - 8773
• Main Authors: Wang, Ziming, Zou, Jun, Zhang, Canyun, Shi, Mingming, Yang, Bobo, Li, Yang, Zhou, Heyu, Liu, Yiming, Li, Mengtian, Qian, Xinglu
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.05.2018; Springer Nature B.V
• Subjects: Cerium; Characterization and Evaluation of Materials; Chemistry and Materials Science; Color temperature; Europium; Light emitting diodes; Lighting; Materials Science; Optical and Electronic Materials; Optical properties; Rendering; Spin coating; Thermal shock; Thermal stability; White light
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-018-8893-7

The high color rendering index of warm white light-emitting diode (WLED) was fabricated using LuAG: Ce 3+ PiG coated CaAlSiN 3 : Eu 2+ phosphor film as converted materials. The LuAG: Ce 3+ PiG and CaAlSiN 3 : Eu 2+ phosphor film was prepared by low-temperature co-sintering and spin coating route, respectively. In this work, the thermal stability of LuAG: Ce 3+ PiG through the thermal shock test was discussed. After that, the optical properties of Lu 2.94−x Y x Al 5 O 12 : 0.06Ce 3+ (x = 0, 0.2, 0.4, 0.6, 0.8) PiG coated CaAlSiN 3 : Eu 2+ phosphor film converted WLEDs were investigated. When x value is 0.4, it exhibits a color rendering index of 94, correlated color temperature of 3087 K and luminous efficiency of 62 lm/W under 20 mA current driving. The package method has excellent developing potential for residential lighting applications.