植物生长LED用Sr_(2)MgAl_(22)O_(36)∶Mn^(4+)荧光玻璃的制备与发光性质  

Preparation and Luminescent Properties of Sr_(2)MgAl_(22)O_(36)∶Mn^(4+)Phosphor-in-glass for Plant Growth LED

作　　者：杨茂林 郑俊丽 余丽萍[1] 廉世勋[1] 周文理[1] YANG Mao-lin;ZHENG Jun-li;YU Li-ping;LIAN Shi-xun;ZHOU Wen-li(College of Chemistry and Chemical Engineering,Hunan Normal University,Changsha 410081,China)

机构地区：[1]湖南师范大学化学化工学院,湖南长沙410081

出　　处：《发光学报》2021年第5期717-723,共7页Chinese Journal of Luminescence

基　　金：国家重点研发计划(2016YFB0302403);国家自然科学基金(21501058)资助项目。

摘　　要：采用两步烧结法低温制备了Sr_(2)MgAl_(22)O_(36)∶Mn^(4+)-(SiO_(2)-Al ^(2)O_(3)-ZnO-BaO)荧光玻璃(SMA∶Mn^(4+)-PiG)。通过X射线衍射、扫描电镜、光致激发和发射光谱、荧光衰减曲线等手段对其物相、成分与发光性能进行了研究。实验结果表明,形成PiG后,SMA∶Mn^(4+)荧光粉的物相和元素组成保持不变。不同SAM∶Mn^(4+)含量的PiG样品在328 nm光激发下,在661 nm处均显示强的发射带,归属于荧光粉中Mn^(4+)的2E→4A 2跃迁,发光光谱与植物光敏色素的红区吸收光谱匹配良好。随着荧光粉含量的增加,SAM∶Mn^(4+)-PiG的发光强度逐渐增大。15%SMA∶Mn^(4+)-PiG样品的内、外量子效率分别为26%和20%,低于SMA∶Mn^(4+)荧光粉的59%和40%。相比于SMA∶Mn^(4+)荧光粉,荧光玻璃的吸收效率和热稳定性略有提高。通过与高功率紫外芯片封装,SMA∶Mn^(4+)-PiG红光LED器件在100 mA驱动电流下展现了最高的电致发光强度。Sr_(2)MgAl_(22)O_(36)∶Mn^(4+)-(SiO_(2)-Al ^(2)O_(3)-ZnO-BaO-B 2O 3)phosphor in glass(SMA∶Mn^(4+)-PiG)was prepared by a two-step co-sintering technology at low temperature.The phase,composition and luminescent properties of PiG samples were investigated by X-ray diffraction(XRD),scanning electron microscope(SEM),excitation and photoluminescence spectra,fluorescence decay curve,etc.Experimental results show that the phase and elemental composition of SMA∶Mn^(4+)phosphor were well preserved after forming PiG.Under 328 nm excitation,PiG samples with different SAM∶Mn^(4+)content all showed strong emission band peaked at 661 nm due to 2E→4A 2 transition of Mn^(4+)ions.The emission spectrum of SMA∶Mn^(4+)-PiG well matches absorption spectra of plant phytochromes.With the increase of phosphor content,the photoluminescence intensity of SAM∶Mn^(4+)-PiG gradually increases.Internal quantum efficiency(IQE)and external quantum efficiency(EQE)of 15%SMA∶Mn^(4+)-PiG samples are 26%and 20%,respectively,which are lower than 59%and 40%of SMA∶Mn^(4+)phosphor.Compared with SMA∶Mn^(4+)phosphor,absorption efficiency and thermal stability of SAM∶Mn^(4+)-PiG are slightly enhanced.With packaging with high-power UV chip,SMA∶Mn^(4+)-PiG red LED device exhibits high electroluminescence intensity,and the highest value is measured at 100 mA.

关 键 词：荧光玻璃 植物生长 Mn^(4+) 发光二极管 

分 类 号：O482.31[理学—固体物理]