Luminescence Characteristics of Polyaluminate Broadband Cyan Phosphor

Wan-lu LI; Peng-peng DAI

doi:10.37188/CJL.20210178

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Luminescence Characteristics of Polyaluminate Broadband Cyan Phosphor

Synthesis and Properties of Materials | 更新时间：2021-09-13

- Luminescence Characteristics of Polyaluminate Broadband Cyan Phosphor
  增强出版
- Chinese Journal of Luminescence Vol. 42, Issue 9, Pages: 1376-1385(2021)
- 作者机构：
  
  1.新疆师范大学物理与电子工程学院　新疆矿物发光及其微结构重点实验室，新疆　乌鲁木齐　 830054
- 作者简介：
- 基金信息：
  
  the National Natural Science Foundation of China(517040);High-level Talents Introduction Program of the Ministry of Science and Technology of the Autonomous Region;Tianshan Talent Phase III;Key Laboratory of Education Department of Xinjiang Normal University(KWFG2002)
- DOI：10.37188/CJL.20210178
  CLC：
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Wan-lu LI, Peng-peng DAI. Luminescence Characteristics of Polyaluminate Broadband Cyan Phosphor. [J]. Chinese Journal of Luminescence 42(9):1376-1385(2021)
DOI：

Wan-lu LI, Peng-peng DAI. Luminescence Characteristics of Polyaluminate Broadband Cyan Phosphor. [J]. Chinese Journal of Luminescence 42(9):1376-1385(2021) DOI： 10.37188/CJL.20210178.

摘要

通过高温固相法成功合成了系列宽带发射且发光颜色可调的Ba,1-,x,Al,12,O,19,∶,x,Ce,3+,(0.01≤,x,≤0.09)荧光粉。X射线衍射、扫描电子显微镜和能量色散X射线能谱元素映射图像结果证明合成了纯相且元素分布均匀的铝酸盐荧光粉。在361 nm近紫外光激发下，随着Ce,3+,掺杂浓度逐渐增加，Ba,1-,x,Al,12,O,19,∶,x,Ce,3+,样品的发光强度逐渐增强且发光颜色由蓝光逐渐调节到青光。在,x,=0.05 mol时，Ba,0.95,Al,12,O,19,∶0.05Ce,3+,样品发光强度达到最大值，荧光内量子产率为30.8%。稳态光谱和荧光寿命结果证实，当Ce,3+,掺杂浓度大于0.05 mol时，Ba,1-,x,Al,12,O,19,∶,x,Ce,3+,样品发生浓度猝灭，该浓度猝灭主要归因于邻近的Ce,3+,-Ce,3+,之间的能量传递。Ba,0.95,Al,12,O,19,∶0.05Ce,3+,样品表现出光谱覆盖范围为365~650 nm、主峰位于450 nm的青光发射，其半高宽为120 nm。该不对称的宽发射带主要源于占据基质晶格中Ba1和Ba2格位的两个Ce,3+,发光中心。将Ba,0.95,Al,12,O,19,∶0.05Ce,3+,和商用红色荧光粉混合制备出简单的可被紫外光(,λ,ex,=365 nm)激发的二色pc-WLEDs，并实现了显色指数和相关色温可调的全可见光谱白光。该宽带青色发光的Ba,0.95,Al,12,O,19,∶0.05Ce,3+,荧光粉在全光谱照明领域具有潜在应用。

Abstract

In this paper, a series of broadband-emitting and tunable Ba,1-,x,Al,12,O,19,∶,x,Ce,3+,(0.01≤,x,≤0.09) phosphors were successfully synthesized by the high-temperature solid-phase method. The results of X-ray diffraction, scanning tunnel electron microscopy and EDS mapping proved that we synthesized aluminate phosphor with pure phase and uniform element distribution. Under the excitation of near-ultraviolet light wavelength of 361 nm, we found that the luminous intensity of Ba,1-,x,Al,12,O,19,∶,x,Ce,3+, samples gradually increased and the luminous color of Ba,1-,x,Al,12,O,19,∶,x,Ce,3+, samples gradually change from blue to cyan as the Ce,3+, concentration increased. When ,x,=0.05 mol, the luminescence intensity of the Ba,0.95,Al,12,O,19,∶0.05Ce,3+, sample reaches the maximum, and the fluorescence internal quantum yield is 30.8%. Steady-state spectroscopy and fluorescence lifetime results confirm that when the doped Ce,3+, concentration is greater than 0.05 mol, the Ba,1-,x,Al,12,O,19,∶,x,Ce,3+, sample undergoes concentration quenching, and the concentration quenching is mainly due to the energy transfer between adjacent Ce,3+,-Ce,3+,. The Ba,0.95,Al,12,O,19,∶0.05Ce,3+, sample exhibits a cyan emission with a spectral coverage of 365-650 nm, a main peak at 450 nm, and its full width at half maximum is 120 nm. The asymmetric broad emission band mainly originates from the two Ce,3+, emission centers occupying the Ba1 and Ba2 sites in the host lattice. Simple dichromatic pc-WLEDs with UV excitation(,λ,ex,=365 nm), full-visible-spectrum white light with adjustable color index and associated color temperature were prepared by mixing Ba,0.95,Al,12,O,19,∶0.05Ce,3+, with a commercial red phosphor. The Ba,0.95,Al,12,O,19,∶0.05Ce,3+, phosphor with broadband cyan luminescence developed in this work has potential applications in the field of full-spectrum lighting.

关键词

宽带发射青色光谱间隙Ce3+掺杂铝酸盐全光谱

Keywords

broadband emissioncyan spectral gapCe3+ dopedaluminatefull spectrum

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