摘要
“激光+荧光转换材料”产生强白光的方案已成为当下照明领域的研究热点之一。本文基于低温共烧技术制备了一种镶嵌Lu_(2)SrAl_(4)SiO_(12)∶Ce^(3+)(LSAS∶Ce^(3+))荧光粉的玻璃陶瓷膜-蓝宝石复合材料。研究表明,共烧时LSAS∶Ce^(3+)荧光粉受到的热侵蚀较少,共烧前后量子效率(~90%)未发生显著变化;并且该材料具有十分优异的抗热猝灭性能,~300℃时荧光积分强度仍保持了室温下的~70%,远优于YAG∶Ce^(3+)商用荧光粉。当蓝光激光功率密度达到3.0 W/mm^(2)时,材料产生发光饱和,此时光通量为100.49 lm,满足室内照明需求。我们推测,热致饱和与光致饱和是发光亮度无法进一步提升的原因所在。相信通过材料组分、制备工艺的优化和光场调控手段的引入,可进一步提高发光亮度,使之适用于户外照明。
“Laser+conversion material”strategy has become one of the hotspots in lighting field.Herein,a phosphor in glass film sintered on sapphire plate(PiG film-on-SP)embedded with Lu_(2)SrAl_(4)SiO_(12)∶Ce^(3+)(LSAS∶Ce^(3+))phosphor was prepared via low temperature co-sintering method.It was demonstrated that LSAS∶Ce^(3+)phosphor was less corroded by glass components during co-sintering,and so,the high quantum efficiency(~90%)was retained.Meanwhile,this material has better thermal quenching performance than commercial YAG∶Ce^(3+)phosphor.The fluorescence integral intensity at~300℃remains~70%of that at room temperature.“Luminescence saturation”takes place under 3.0 W/mm^(2)blue laser irradiation,and the corresponding luminous flux is 100.49 lm,applicable to in-door scenarios.It was speculated that thermal saturation and optical saturation simultaneously occur,restricting the achievable brightness.After optimization of material composition,preparation process,as well as employing the light field regulation method,LSAS∶Ce^(3+)PiG film-on-SP with higher brightness will be hopefully applicable to out-door scenarios.
作者
王鹏飞
隋萍
林世盛
林航
王元生
WANG Peng-fei;SUI Ping;LIN Shi-sheng;LIN Hang;WANG Yuan-sheng(CAS Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China;Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China)
出处
《发光学报》
EI
CAS
CSCD
北大核心
2021年第10期1493-1501,共9页
Chinese Journal of Luminescence
基金
国家自然科学基金(U2005213,11774346,51972303)
福建省自然科学基金(2020H0035)
中国福建光电信息科学与技术创新实验室基金(2021ZR134)资助项目。
关键词
激光照明
荧光粉
荧光玻璃陶瓷
石榴石结构
laser lighting
phosphor
luminescent glass ceramics
garnet structure
