Mn4+ Doped Narrowband Red Phosphors with Short Fluorescence Lifetime and High Color Stability for Fast-Response Backlight Display Application
作者单位：State Key Laboratory of Luminescent Materials and Devices and Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of Technology
会议名称：《中国稀土学会2020学术年会暨江西(赣州)稀土资源绿色开发与高效利用大会》
会议日期：2020年
学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术]
关 键 词：Mn4+ short fluorescence lifetime color stability fast-response displays
摘 要：Mn-activated narrow-band red phosphors are the key materials for wide-gamut displays,however,it is a great challenge to develop the phosphor that adapts to the new requirements of fast response and color ***,red phosphors CsB’ScF:Mn(CB’SFM,B’=Na,K,Rb and Cs) with short fluorescence lifetime (2.06～4.13 ms) and weak intensity of temperature-sensitive zero phonon line (ZPL) emission have been *** phosphors can avoid display tailing phenomenon and color shift under different working *** density functional theory (DFT) calculations show that Mntends to substitute for Scand form a Csvacancy V() for charge compensation,which would cause appropriate local environment distortion of Mn,resulting in short PL lifetime as well as weak ZPL emission in(a).Furthermore,on the basis of the luminescence kinetics,a modified thermal quenching evaluation model is further proposed to evaluate the thermal stability of the doped *** w-LED device fabricated with the CsKScF:Mn,green phosphorβ-Sialon and blue chip can achieve a color gamut above 105%of the National Television System Committee (NTSC)standard value,suggesting red phosphor CsKScF:Mnhas potential application in the new generation of fast-response and color stable displays.