"Improving color quality of nanowire white light-emitting diodes with m" by Thi Hong Quan Vu, Thi Tuyet Doan et al.
 

Improving color quality of nanowire white light-emitting diodes with mn4+ doped fluoride nanosheets

Document Type

Article

Publication Date

8-1-2021

Abstract

A two-dimensional nanostructured fluoride red-emitting phosphor with an excellent quantum yield of ~91% is studied for cost-effective and high-color quality nanowire white light-emitting diodes (WLEDs). K2TiF6:Mn4+ phosphors are synthesized via an emulsification method using surfactants as sodium dodecyl sulphonate and oleic acid. The K2TiF6:Mn4+ phosphors in ultra-thin and nanosheet crystals are observed via scanning electron microscopy and high-resolution transmission electron microscopy. The surfactants are found to play a key role in inhibition of KTFM crystal growth process and stabilization of Mn4+ ions doping into the K2TiF6 host. The prepared phosphors exhibited intensive red emission at approximately 632 nm and excellent thermal stability in the range of 300 K–500 K upon 460 nm light excitation. Moreover, the K2TiF6:Mn4+ nanosheets were integrated on InGaN/AlGaN nanowire WLEDs for color quality study. The results show that the nanowire WLEDs with red-emitting phosphor exhibit unprecedentedly high color rendering index ~96.4, and correlated color temperature ~4450 K.

Identifier

85113337453 (Scopus)

Publication Title

Micromachines

External Full Text Location

https://doi.org/10.3390/mi12080965

e-ISSN

2072666X

Issue

8

Volume

12

Grant

113/2019/HĐ-QPTKHCN

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