摘要
热猝灭性能极大程度上限制了发光材料的应用,如何改善发光材料的热稳定性这一课题受到了广泛关注。本文通过高温固相法制备了一系列浓度梯度的Li_(3)Cs_(2)Ba_(2-x)Sr_(x)B_(3)P_(6)O_(24)∶0.03Eu^(2+)荧光粉,并对该系列荧光粉进行了表征,对其XRD、激发发射光谱、荧光寿命、热猝灭性能进行了分析。结果表明,通过阳离子Sr替代Ba的方法不但改善了晶格结构,提升了样品的发光强度,而且使原发光材料的热稳定性能进一步得到了提高。对于Li_(3)Cs_(2)Ba_(2)B_(3)P_(6)O_(24)∶Eu^(2+)样品,在150℃下的发光强度已经可以达到常温下的79%,通过Sr替换Ba,该强度能够进一步提高到87%。相关分析及结论可为荧光粉热稳定性的改善提供思路与依据。
One of the more critical attributes of inorganic phosphors is the thermal quenching properties.In this study,we attempt to improve the photoluminescence and thermal quenching behavior by cation substitution.The op-tical,structural property,the thermal stability,and lifetime decay properties of phosphors were investigated.The re-sults indicate that Sr substitution of Ba in Li_(3)Cs_(2)Ba_(2-x)Sr_(x)B_(3)P_(6)O_(24)∶Eu^(2+)system could not only improve the luminous effi-ciency but also achieve better thermal stability at high temperature.This new series of blue luminescent materials have potential applications in LED applications.More importantly,we demonstrate a strategy to develop highly effi-cient,thermally stable phosphors.
作者
索慧娴
宋志
康晓娇
李昕明
周飞
吕伟
SUO Huixian;SONG Zhi;KANG Xiaojiao;LI Xinming;ZHOU Fei;LYU Wei(School of Electrical Engineering and Intelligentization,Dongguan University of Technology,Dongguan 523808,China;Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices,School of Information and Optoelectronic Science and Engineering,South China Normal University,Guangzhou 510006,China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2023年第5期837-844,共8页
Chinese Journal of Luminescence
基金
东莞市社会发展科技项目(20221800905152)
东莞市科技特派员项目(20221800500192)
广东省城市生命线工程智能防灾应急技术重点实验室(2022B1212010016)。
