Temperature-Dependent Electroluminescence of Phosphor-Converted White LEDs With K2SiF6:Mn4+ Below Room Temperature

被引：3

作者：

Zhang, Debao ^{[1
,2
]}

Zheng, Yuruo ^{[2
]}

Lu, Kechao ^{[2
]}

Wang, Zihao ^{[3
]}

Tang, Fei ^{[3
]}

Ning, Jiqiang ^{[1
]}

Xu, Shijie ^{[1
]}

Zheng, Changcheng ^{[2
]}

机构：

[1] Fudan Univ, Sch Informat Sci & Technol, Dept Opt Sci & Engn, Shanghai 200438, Peoples R China

[2] Duke Kunshan Univ, Div Nat & Appl Sci, Kunshan 215316, Peoples R China

[3] Jiangsu Normal Univ, Sch Phys & Elect Engn, Xuzhou 221116, Jiangsu, Peoples R China

来源：

IEEE ELECTRON DEVICE LETTERS | 2022年 / 43卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Light-emitting diodes; K2SiF6:Mn4+; negative-thermal-quenching effect; color tuning; electroluminescence; HIGHLY EFFICIENT; RED PHOSPHOR; PHOTOLUMINESCENCE; LUMINESCENCE; EMISSIONS;

D O I：

10.1109/LED.2022.3151117

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

High-efficiency Mn4+-activated red phosphor of K2SIF6:Mn4+ synthesized at low temperature was utilized to fabricate phosphor-converted white light-emitting diodes (pc-WLEDs). Temperature-dependent electroluminescence (EL) measurements were undertaken at a constant forward voltage mode. A large negative-thermal-quenching (NTQ) effect is demonstrated for the luminescence intensity of this kind of red phosphor in the temperature range of 100-300 K. It is found that its enhancement rate is several times higher than those of the blue chip and the green component, such that the overall color of the pc-WLED shows a wide color gamut in the studied temperature range. By utilizing this outstanding NTQ property of the red phosphor, a color rendering index up to R-a = 93 is obtained for the high-brightness pc-WLED with relatively low blue light from the LED chip.

引用

页码：600 / 603

页数：4

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