Preparation and Luminescence Properties of SrSi2O2N2:Eu2+ Phosphors for White LEDs
Preparation and Luminescence Properties of SrSi2O2N2:Eu2+ Phosphors for White LEDs
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DOI：
10.2109/jcersj2.115.619
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发表时间：
2007
影响因子：
1.1
通讯作者：
Bong-Goo Yun;K. Machida;Hajime Yamamoto
中科院分区：
文献类型：
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作者：
Bong-Goo Yun;K. Machida;Hajime Yamamoto
本文研究了以Sr2SiO4: Eu2+为前驱体合成SrSi2O2N2: Eu2+荧光粉的发光特性。与传统的固相反应方法相比，该方法提高了结晶度和发光效率。x射线衍射分析表明，SrSi2O2N2: Eu2+几乎是单相形成的，但化学分析表明，所得样品的氧/氮原子比偏离了化学计量组成。可以预期，该荧光粉的发光效率对于化学计量组成将高于非化学计量组成。在460 nm激发下，随着Eu2+浓度的变化，该荧光体在538 ~ 564 nm处出现峰值，在15 mol%处达到峰值，具有较高的集成光致发光强度，是商用黄色荧光粉（Y,Gd）3Al5O12: Ce3+ (P46-Y3)的1.05倍。
This work has investigated luminescence properties of SrSi2O2N2: Eu2+ phosphors synthesized by a new method using Sr2SiO4: Eu2+ as a precursor. Compared with a conventional solid-state reaction method, this method provides increased crystallinity and luminescence efficiency. X-ray diffraction analysis has indicated that SrSi2O2N2: Eu2+ formed as an almost single-phase, but chemical analysis has shown that obtained samples have an oxygen/nitrogen atomic ratio deviated from the stoichiometric composition. It can be expected that luminescence efficiency of this phosphor will be higher for the stoichiometric composition than for non-stoichiometric ones. Under 460 nm excitation, this phosphor shows an emission band peaked at 538-564 nm for varied Eu2+ concentration, and shows the maximum at 15 mol% with high integrated photoluminescence intensity, which is about 1.05 times as high as that of the commercial yellow phosphor, (Y,Gd)3Al5O12: Ce3+ (P46-Y3).