Novel Mn4+ doped red phosphors composed of MgAl2 O4 and CaAl12 O19 phases for light-emitting diodes

Dalton Transactions : an International Journal of Inorganic Chemistry
Yibing WuXinhua Ouyang

Abstract

Red emitters based on CaAl12O19:Mn4+ have been attracting extensive attention due to their advantages of being rare-earth-free and chemically stable. However, their relatively low luminescence efficiencies will seriously hinder their application in light-emitting diodes (LEDs). In this regard, the promising red phosphors of CaAl12O19:Mn4+ were synthesized with enhanced luminous efficiency by introducing the coexisting phase of MgAl2O4. Importantly, an approximately 5 times enhancement of integrated intensity in the emission spectrum was observed for the phosphor with the coexisting phase compared to that with a single phase. Their crystal structures, morphologies and photoluminescence properties and the mechanism of improved luminescence were systematically investigated. Upon exciting them by using near-ultraviolet or blue LEDs, an efficient red emission was achieved with a maximum peak at ∼658 nm. In order to evaluate their potential application, a warm white LED and a plant growth LED were fabricated by using the prepared phosphors in combination with YAG:Ce3+ and InGaN-based blue chips.

References

Sep 22, 2015·Journal of the American Chemical Society·Zhiguo XiaKenneth R Poeppelmeier
Mar 1, 2016·Physical Chemistry Chemical Physics : PCCP·Xin DingYuhua Wang
Nov 12, 2016·Chemical Society Reviews·Zhiguo Xia, Andries Meijerink
Feb 19, 2019·Advanced Materials·Romain GautierMichael Paris
Apr 5, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Thomas JansenHellmut Eckert
Sep 7, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Robert SchmidtHans-Jürgen Meyer

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Citations

Aug 10, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Yunpeng ZhouYuhua Wang

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Methods Mentioned

BETA
chips
chip
X-ray

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