Luminescence properties of high thermal stability Sr_2LaNbO_6: xLn~(3+)(Ln~(3+)=Eu~(3+)/Sm~(3+)) phosphors with double-perovskite structures

Hu GengQiao; Yi Shuangping; Fang ZhiXiong; Hu Zhengfa

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Luminescence properties of high thermal stability Sr_2LaNbO_6: xLn~(3+)(Ln~(3+)=Eu~(3+)/Sm~(3+)) phosphors with double-perovskite structures

机译：高热稳定性Sr_2LaNbO_6的发光特性：双钙钛矿结构的xLn〜（3 +）（Ln〜（3 +）= Eu〜（3 +）/ Sm〜（3+））荧光粉

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摘要

A series of novel single-phased niobate phosphors Sr2LaNbO6:xLn(3+)(Ln(3+) = Eu3+/Sm3+) (SLNO:Ln(3+)) with red light emission was successfully synthesized by a conventional solid-state method and characterized using X-ray photoelectron spectroscopy (XPS), X-ray diffraction, and photoluminescence. The phosphors showed high thermal stabilities, and at 423 K they still retained 60.7% and 80.7% emission efficiencies for the Eu3+ and Sm3+ variants, respectively. There is a difference in decay time between Eu3+ and Sm3+ due to the energy transit in different energy levels. The crystalline structure was described as a double-perovskite structure with several hexa-coordinated sites. The synthesized Eu3+ phosphor had more favorable characteristics for LEDs and a prototype device was fabricated with blue-green commercial LED phosphors, Sr2LaNbO6:0.13Eu(3+), and a 395 nm-emitting InGaN chip, which exhibited warm white light, with a color temperature of 4833 K. The current study demonstrates that Sr2LaNbO6:0.13Eu(3+) can be a potent red phosphor in LED applications.

机译：通过常规固态方法成功合成了一系列具有红色发光的新型单相铌酸盐荧光粉Sr2LaNbO6：xLn（3 +）（Ln（3+）= Eu3 + / Sm3 +）（SLNO：Ln（3+））。并使用X射线光电子能谱（XPS），X射线衍射和光致发光进行表征。磷光体显示出高的热稳定性，并且在423 K下，对于Eu3 +和Sm3 +变体，它们仍然保持60.7％和80.7％的发射效率。由于不同能级下的能量传递，Eu3 +和Sm3 +之间的衰减时间有所不同。晶体结构被描述为具有几个六配位位点的双钙钛矿结构。合成的Eu3 +荧光粉对LED具有更有利的特性，并用蓝绿色的商用LED荧光粉，Sr2LaNbO6：0.13Eu（3+）和发射395 nm的InGaN芯片制造了原型器件，该芯片显示出暖白光，并且具有色温为4833K。当前研究表明，Sr2LaNbO6：0.13Eu（3+）可以成为LED应用中的有效红色荧光粉。

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来源
《Optical Materials》 |2019年第12期|109428.1-109428.6|共6页
作者
Hu GengQiao; Yi Shuangping; Fang ZhiXiong; Hu Zhengfa;
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作者单位

Guangdong Univ Technol Sch Phys & Optoelect Engn 100 Waihuan Xi Rd Guangzhou 510006 Guangdong Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Niobate; W-LED; Thermal stability; Double-perovskite;

机译：铌酸盐;W-LED;热稳定性;双钙钛矿;

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Luminescence properties of high thermal stability Sr_2LaNbO_6: xLn~(3+)(Ln~(3+)=Eu~(3+)/Sm~(3+)) phosphors with double-perovskite structures

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