Photoluminescent Evolution Induced by Structural Transformation Through Thermal Treating in the Red Narrow-Band Phosphor K2GeF6:Mn4+

Ling Ling Wei; Chun Che Lin; Yi Ying Wang; Mu Huai Fang; Huan Jiao; Ru Shi Liu

doi:10.1021/acsami.5b02212

Photoluminescent Evolution Induced by Structural Transformation Through Thermal Treating in the Red Narrow-Band Phosphor K₂GeF₆:Mn⁴⁺

Ling Ling Wei, Chun Che Lin, Yi Ying Wang, Mu Huai Fang, Huan Jiao, Ru Shi Liu

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

146 Citations (Scopus)

Abstract

This study explored optimal preparation conditions for K₂GeF₆:Mn⁴⁺ red phosphors by using chemical coprecipitation method. The prepared hexagonal P3m1 K₂GeF₆:Mn⁴⁺ exhibited efficient red emission, high color purity, good Mn⁴⁺ concentration stability, and low thermal quenching. Structural evolution from hexagonal P3m1 to P6₃mc and then P6₃mc to cubic Fm3m occurred after thermal treatment at approximately 400 and 500°C, respectively. Hexagonal P6₃mc phase showed an obvious zero phonon line peak at 621 nm, whereas cubic Fm3m phase showed no red emission. Yellowish K₂GeF₆:Mn⁴⁺ with both hexagonal P3m1 and P6₃mc symmetries are promising commercial red phosphors for white light-emitting diodes. (Figure Presented)

Original language	English
Pages (from-to)	10656-10659
Number of pages	4
Journal	ACS Applied Materials and Interfaces
Volume	7
Issue number	20
DOIs	https://doi.org/10.1021/acsami.5b02212
Publication status	Published - May 27 2015
Externally published	Yes

Keywords

chemical coprecipitation method
phosphors
photoluminescent properties
structural evolution
thermal stability

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1021/acsami.5b02212

Cite this

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title = "Photoluminescent Evolution Induced by Structural Transformation Through Thermal Treating in the Red Narrow-Band Phosphor K2GeF6:Mn4+",

abstract = "This study explored optimal preparation conditions for K2GeF6:Mn4+ red phosphors by using chemical coprecipitation method. The prepared hexagonal P3m1 K2GeF6:Mn4+ exhibited efficient red emission, high color purity, good Mn4+ concentration stability, and low thermal quenching. Structural evolution from hexagonal P3m1 to P63mc and then P63mc to cubic Fm3m occurred after thermal treatment at approximately 400 and 500°C, respectively. Hexagonal P63mc phase showed an obvious zero phonon line peak at 621 nm, whereas cubic Fm3m phase showed no red emission. Yellowish K2GeF6:Mn4+ with both hexagonal P3m1 and P63mc symmetries are promising commercial red phosphors for white light-emitting diodes. (Figure Presented)",

keywords = "chemical coprecipitation method, phosphors, photoluminescent properties, structural evolution, thermal stability",

author = "Wei, {Ling Ling} and Lin, {Chun Che} and Wang, {Yi Ying} and Fang, {Mu Huai} and Huan Jiao and Liu, {Ru Shi}",

year = "2015",

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AU - Wei, Ling Ling

AU - Lin, Chun Che

AU - Wang, Yi Ying

AU - Fang, Mu Huai

AU - Jiao, Huan

AU - Liu, Ru Shi

PY - 2015/5/27

Y1 - 2015/5/27

N2 - This study explored optimal preparation conditions for K2GeF6:Mn4+ red phosphors by using chemical coprecipitation method. The prepared hexagonal P3m1 K2GeF6:Mn4+ exhibited efficient red emission, high color purity, good Mn4+ concentration stability, and low thermal quenching. Structural evolution from hexagonal P3m1 to P63mc and then P63mc to cubic Fm3m occurred after thermal treatment at approximately 400 and 500°C, respectively. Hexagonal P63mc phase showed an obvious zero phonon line peak at 621 nm, whereas cubic Fm3m phase showed no red emission. Yellowish K2GeF6:Mn4+ with both hexagonal P3m1 and P63mc symmetries are promising commercial red phosphors for white light-emitting diodes. (Figure Presented)

AB - This study explored optimal preparation conditions for K2GeF6:Mn4+ red phosphors by using chemical coprecipitation method. The prepared hexagonal P3m1 K2GeF6:Mn4+ exhibited efficient red emission, high color purity, good Mn4+ concentration stability, and low thermal quenching. Structural evolution from hexagonal P3m1 to P63mc and then P63mc to cubic Fm3m occurred after thermal treatment at approximately 400 and 500°C, respectively. Hexagonal P63mc phase showed an obvious zero phonon line peak at 621 nm, whereas cubic Fm3m phase showed no red emission. Yellowish K2GeF6:Mn4+ with both hexagonal P3m1 and P63mc symmetries are promising commercial red phosphors for white light-emitting diodes. (Figure Presented)

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KW - thermal stability

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