Luminescence and Spectroscopic Properties of Yellow-Emitting Carbonitride Phosphors and Their Application in White LEDs
Luminescence and Spectroscopic Properties of Yellow-Emitting Carbonitride Phosphors and Their Application in White LEDs
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DOI：
10.1149/1.3476307
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发表时间：
2010-10
影响因子：
3.9
通讯作者：
Yun-Chen Wu;Teng-Ming Chen;C. Chiu;C. Mo
中科院分区：
文献类型：
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作者：
Yun-Chen Wu;Teng-Ming Chen;C. Chiu;C. Mo
采用放热固相复化法合成了一系列组成为（Y 1-x Ce x） 2 (CN 2) 3 （x = 0-0.1）的发黄碳氮化荧光粉。宽频带黄色发射的波长可调，在570 ~ 577nm之间。随着ce3 +掺杂量的增加，发光强度增强，在415 nm激发下，发光强度达到3mol %。我们分析了ce3 +在帽状三角棱柱配合物中的5d能级，并估计了其振动耦合参数和Stokes位移。为了了解热猝灭行为，研究了（Y 1.97 Ce 0.03） 2 (CN 2) 3的温度相关PL。为了证明其潜在的应用前景，我们用（y1.97 Ce 0.03） 2 (cn2) 3制备了一个暖白光发光二极管（LED），并泵浦了一个420 nm的GaInN LED芯片，并给出了电致发光数据。
A series of yellow-emitting carbonitride phosphors with compositions of (Y 1―x Ce x ) 2 (CN 2 ) 3 (x = 0-0.1) was synthesized by using exothermic solid-state metathesis reactions. The wavelength of the broad band yellow emission was tunable, varying from 570 to 577 nm. The photoluminescence (PL) intensity enhanced with increasing Ce 3+ dopant content and was optimized at 3 mol % under excitation at 415 nm. We analyzed the 5d energy levels of Ce 3+ in a capped trigonal prismatic complex and estimated the vibronic coupling parameters and Stokes shifts. To understand the thermal quenching behavior, the temperature-dependent PL for (Y 1.97 Ce 0.03 ) 2 (CN 2 ) 3 was investigated. To demonstrate its potential application, we fabricated a warm white light-emitting diode (LED) using (Y 1.97 Ce 0.03 ) 2 (CN 2 ) 3 , pumped with a 420 nm GaInN LED chip, and the electroluminescence data were also presented. .