Chromaticity-Tunable Emission of Sr3AlO4F:Ce3+ Phosphor: Correlation with Matrix Structure and Application in LEDs
Chromaticity-Tunable Emission of Sr3AlO4F:Ce3+ Phosphor: Correlation with Matrix Structure and Application in LEDs
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DOI：
10.1149/1.3337092
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发表时间：
2010-05
影响因子：
3.9
通讯作者：
Wanping Chen;Hong-bin Liang;Haiyong Ni;P. He;Q. Su
中科院分区：
文献类型：
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作者：
Wanping Chen;Hong-bin Liang;Haiyong Ni;P. He;Q. Su
采用高温固相反应法制备了Sr 3-2x Ce，Na x al4f荧光粉，并对其发光性能进行了研究。ce3 +离子在这些荧光粉中占据两个不同的sr2 +位置，并从基质结构的角度讨论了两个发光中心产生的不同发射。位置占用和能量传递过程产生了浓度依赖的发光行为，通过控制ce3 +的浓度，可以在较大的色域内实现从蓝绿到黄绿的发光。由于该荧光粉在近紫外到蓝光光谱范围内具有较强的吸收特性，因此该荧光粉被用于制备磷转换发光二极管。结果表明，sr3 -2x Ce x Na x alo4f荧光粉在发光二极管器件中具有潜在的应用前景。
Sr 3-2x Ce,Na x AlO 4 F phosphors were synthesized by a high temperature solid-state reaction method, and their luminescence properties were investigated. Ce 3+ ions occupy two different Sr 2+ sites in these phosphors, and the different emissions derived from the two luminescent centers are discussed in terms of the matrix structure. The site occupancy and energy-transfer process give rise to the concentration-dependent luminescence behaviors, and the emission color may be tuned in a large color gamut from blue-green to yellow-green by controlling the Ce 3+ concentration. Because the phosphors exhibit a strong absorption in the range of near-UV to blue spectral region, the phosphors were utilized to fabricate the phosphor-converted light emitting diodes. The results show that the phosphors Sr 3-2x Ce x Na x AlO 4 F have potential applications in light emitting diode (LED) devices.