Luminescent Properties of a Cs3AlF6:Mn4+ Red Phosphor for Warm White Light-Emitting Diodes. (1st January 2018)

• Record Type: Journal Article
• Authors: Ming, Hong; Zhang, Junfei; Liu, Lili; Peng, Jiaqing; Du, Fu; Ye, Xinyu
• Is Part Of: ECS journal of solid state science and technology. Volume 7:Number 9(2018)
• Page Start: R149
• Page End: R155
• Publication Date: 2018-01-01
• Subjects: Cs3AlF6:Mn4+ -- Red phosphor -- Warm white LEDs; Solid state chemistry -- Periodicals; Electronics -- Materials -- Periodicals; Electrochemistry -- Periodicals; 541.0421
• DOI: 10.1149/2.0271809jss
• Languages: English
• ISSNs: 2162-8777

Abstract

Abstract : Mn 4+ activated fluoride phosphors have been considered as highly promising red component for warm white light-emitting diodes (WLEDs) in recent years. In this work, a novel nonequivalent doping Cs3 AlF6 :Mn 4+ red-emitting phosphor were synthesized via a co-precipitation method and its crystal structure, morphology, and luminescent properties were investigated in detail. The Cs3 AlF6 :Mn 4+ phosphor with a sheet morphology have broad band absorption in blue light region (∼467 nm) and narrow bandwidth emissions in red region (∼634 nm). The WLED fabricated with Cs3 AlF6 :Mn 4+ red phosphor, YAG:Ce 3+ yellow phosphor and a blue InGaN LED chip demonstrates intense warm light with good luminescence performance of low related color temperature (CCT, Tc = 3659 K) and high color rendering index (CRI, Ra = 86.2). These results indicate the Cs3 AlF6 :Mn 4+ red phosphor can be a potential candidate for warm WLEDs.