Feasible preparation of red-phosphor K2SiF6:Mn4+coated with SiO2 for white light emitting diodes application

Vu Thi Hong Quan; Doan Thi Tuyet; Przemysław J. Dereń; Nguyen Pham Trung Hieu; Nguyen Hoang Duy

doi:10.1002/vjch.201960029

Feasible preparation of red-phosphor K₂SiF₆:Mn⁴⁺coated with SiO₂ for white light emitting diodes application

Vu Thi Hong Quan, Doan Thi Tuyet, Przemysław J. Dereń, Nguyen Pham Trung Hieu, Nguyen Hoang Duy

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

We report a facile approach for coating K₂SiF₆:Mn⁴⁺red-phosphor with a moisture-resistant silica layervia the one-step co-precipitation using tetraethyl orthosilicate (TEOS) and sodium dodecyl benzene sulphonate (SDBS) surfactant. The bare K₂SiF₆:Mn⁴⁺ (KSF) phosphor with nearly round-shape and 10 μm diameter, showed a high external quantum yield ~0.502 under 460 nm light excitation. The 40 nm- and 80 nm-thick SiO₂ coatinglayers on the phosphor surface was observed via transmission electron microscopy (TEM). The K₂SiF₆:Mn⁴⁺ coated with SiO₂ (KSF@SiO₂) phosphor possesses bright red emission at approximately 630 nm, high thermal stability and excellent waterproof. Effect of coating layer-thickness on photoluminescence properties of the prepared phosphors have been investigated and discussion.

Original language	English (US)
Pages (from-to)	384-388
Number of pages	5
Journal	Vietnam Journal of Chemistry
Volume	57
Issue number	3
DOIs	https://doi.org/10.1002/vjch.201960029
State	Published - Jun 2019

All Science Journal Classification (ASJC) codes

General Chemistry

Keywords

Fluoride phosphor
red-emission KSiF:Mn
silica coating materials

Access to Document

10.1002/vjch.201960029

Cite this

@article{e30f0702366e4792afb62dc3fd2c1f24,

title = "Feasible preparation of red-phosphor K2SiF6:Mn4+coated with SiO2 for white light emitting diodes application",

abstract = "We report a facile approach for coating K2SiF6:Mn4+red-phosphor with a moisture-resistant silica layervia the one-step co-precipitation using tetraethyl orthosilicate (TEOS) and sodium dodecyl benzene sulphonate (SDBS) surfactant. The bare K2SiF6:Mn4+ (KSF) phosphor with nearly round-shape and 10 μm diameter, showed a high external quantum yield \textasciitilde{}0.502 under 460 nm light excitation. The 40 nm- and 80 nm-thick SiO2 coatinglayers on the phosphor surface was observed via transmission electron microscopy (TEM). The K2SiF6:Mn4+ coated with SiO2 (KSF@SiO2) phosphor possesses bright red emission at approximately 630 nm, high thermal stability and excellent waterproof. Effect of coating layer-thickness on photoluminescence properties of the prepared phosphors have been investigated and discussion.",

keywords = "Fluoride phosphor, red-emission KSiF:Mn, silica coating materials",

author = "Quan, \{Vu Thi Hong\} and Tuyet, \{Doan Thi\} and Dere{\'n}, \{Przemys{\l}aw J.\} and Hieu, \{Nguyen Pham Trung\} and Duy, \{Nguyen Hoang\}",

note = "Publisher Copyright: {\textcopyright} 2019 Vietnam Academy of Science and Technology, Hanoi \& Wiley-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2019",

month = jun,

doi = "10.1002/vjch.201960029",

language = "English (US)",

volume = "57",

pages = "384--388",

journal = "Vietnam Journal of Chemistry",

issn = "2572-8288",

publisher = "John Wiley and Sons Inc.",

number = "3",

}

TY - JOUR

T1 - Feasible preparation of red-phosphor K2SiF6:Mn4+coated with SiO2 for white light emitting diodes application

AU - Quan, Vu Thi Hong

AU - Tuyet, Doan Thi

AU - Dereń, Przemysław J.

AU - Hieu, Nguyen Pham Trung

AU - Duy, Nguyen Hoang

PY - 2019/6

Y1 - 2019/6

N2 - We report a facile approach for coating K2SiF6:Mn4+red-phosphor with a moisture-resistant silica layervia the one-step co-precipitation using tetraethyl orthosilicate (TEOS) and sodium dodecyl benzene sulphonate (SDBS) surfactant. The bare K2SiF6:Mn4+ (KSF) phosphor with nearly round-shape and 10 μm diameter, showed a high external quantum yield ~0.502 under 460 nm light excitation. The 40 nm- and 80 nm-thick SiO2 coatinglayers on the phosphor surface was observed via transmission electron microscopy (TEM). The K2SiF6:Mn4+ coated with SiO2 (KSF@SiO2) phosphor possesses bright red emission at approximately 630 nm, high thermal stability and excellent waterproof. Effect of coating layer-thickness on photoluminescence properties of the prepared phosphors have been investigated and discussion.

AB - We report a facile approach for coating K2SiF6:Mn4+red-phosphor with a moisture-resistant silica layervia the one-step co-precipitation using tetraethyl orthosilicate (TEOS) and sodium dodecyl benzene sulphonate (SDBS) surfactant. The bare K2SiF6:Mn4+ (KSF) phosphor with nearly round-shape and 10 μm diameter, showed a high external quantum yield ~0.502 under 460 nm light excitation. The 40 nm- and 80 nm-thick SiO2 coatinglayers on the phosphor surface was observed via transmission electron microscopy (TEM). The K2SiF6:Mn4+ coated with SiO2 (KSF@SiO2) phosphor possesses bright red emission at approximately 630 nm, high thermal stability and excellent waterproof. Effect of coating layer-thickness on photoluminescence properties of the prepared phosphors have been investigated and discussion.

KW - Fluoride phosphor

KW - red-emission KSiF:Mn

KW - silica coating materials

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U2 - 10.1002/vjch.201960029

DO - 10.1002/vjch.201960029

M3 - Article

AN - SCOPUS:85102195182

SN - 2572-8288

VL - 57

SP - 384

EP - 388

JO - Vietnam Journal of Chemistry

JF - Vietnam Journal of Chemistry

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