Smart design to resolve spectral overlapping of phosphor-in-glass for high-powered remote-type white light-emitting devices
Smart design to resolve spectral overlapping of phosphor-in-glass for high-powered remote-type white light-emitting devices
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DOI：
10.1364/ol.39.000762
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发表时间：
2014-02-15
期刊：
影响因子：
3.6
通讯作者：
Bin Im, Won
中科院分区：
文献类型：
--
作者：
Lee, Jin Seok;Arunkumar, P.;Bin Im, Won
白色发光二极管（WLED）是一种最先进的固态技术，由于其降低的能耗、可靠性和长寿命，已取代传统照明系统。然而，由于WLED缺乏照明设备的颜色纯度、功效和热稳定性，因此其在设备工程中提出了严峻的挑战。色纯度和发光效率不足的主要原因是当通过泵浦具有黄色YAG：Ce 3+磷光体的蓝色InGaN芯片（其中包括红色磷光体）以补偿红色区域中的不足而产生白色光时，红色分量与黄色/绿色发射的光谱重叠。提出了一种新的光谱重叠解决方案，即通过切割和重组商业红色CaAlSiN 3：Eu 2+和绿色Lu 3Al 5 O 12：Ce 3 + PiG，交替排列玻璃中的荧光粉（PiG）。使用软化温度低至600 ℃的玻璃料制造的PiG具有优异的热稳定性和高透明度，即使在200 ℃的工作温度下也能提高使用寿命。这种策略克服了光谱重叠的问题，更有效地比随机混合和专利堆叠设计的多种荧光粉的远程型WLED。PiG的当前设计的协议具有优异的热稳定性和化学稳定性以及高发光效率和色纯度，是为高功率远程型白色发光器件制造更智能的固态照明的尝试。(C)2014年美国光学学会
The white light-emitting diode (WLED) is a state-of-the-art solid state technology, which has replaced conventional lighting systems due to its reduced energy consumption, its reliability, and long life. However, the WLED presents acute challenges in device engineering, due to its lack of color purity, efficacy, and thermal stability of the lighting devices. The prime cause for inadequacies in color purity and luminous efficiency is the spectral overlapping of red components with yellow/green emissions when generating white light by pumping a blue InGaN chip with yellow YAG:Ce3+ phosphor, where red phosphor is included, to compensate for deficiencies in the red region. An innovative strategy was formulated to resolve this spectral overlapping by alternatively arranging phosphor-in-glass (PiG) through cutting and reassembling the commercial red CaAlSiN3:Eu2+ and green Lu3Al5O12:Ce3+ PiG. PiGs were fabricated using glass frits with a low softening temperature of 600 degrees C, which exhibited excellent thermal stability and high transparency, improving life time even at an operating temperature of 200 degrees C. This strategy overcomes the spectral overlapping issue more efficiently than the randomly mixed and patented stacking design of multiple phosphors for a remote-type WLED. The protocol for the current design of PiG possesses excellent thermal and chemical stability with high luminous efficiency and color purity is an attempt to make smarter solid state lighting for high-powered remote-type white light-emitting devices. (C) 2014 Optical Society of America