Seeking new,ultra-narrow-band blue emitting phosphors with high color purity for wide color gamut displays  

作　　者：Zuobin Tang Feng Du Zhihua Leng Huidong Xie Yanyan Li Lei Zhao 

机构地区：[1]School of Chemistry and Chemical Engineering,Xi'an University of Architecture and Technology,Xi'an,710055,China [2]Collaborative Innovation Center of Rare-Earth Optical Functional Materials and Devices Development,School of Physics and Opto-Electronic Technology,Baoji University of Arts and Sciences,Baoji,721016,China

出　　处：《Journal of Rare Earths》2023年第12期1876-1882,I0002,共8页稀土学报（英文版）

基　　金：Project supported by the Natural Science Foundation of Shaanxi Provincial Department of Education,China (21JK0708);the Key Laboratory for Special Function Materials and Structure Design of the Ministry of the Education of Lanzhou University,China (lzujbky-2021-kb06)。

摘　　要：Ultra-narrow-band phosphors have gained widespread applications in lighting and displays to enhance brightness and improve color saturation.Typical phosphor designs employ UCr_(4)C_(4)-type compounds and designing new narrow-band phosphors with high color purity is a major challenge.Here,we explored a Eu^(2+)-doped Ba_(5)GeO_(4)Br_(6)phosphor,showing a narrow-band blue emission(λ_(em)=436 nm) excitation at the near-ultraviolet light with a full width at half maximum of 30.7 nm and high color purity of 96.6%.In addition,attractive cathodoluminescence characteristics were systematically analyzed by varying filament current(30-70 mA) and accelerating voltage(3-7 eV).Robust anti-degradation behavior and color point stability under continuous electron beam bombardment were confirmed.Given its excellent performance in photoluminescence and cathodoluminescence,application in wide color gamut displays appears promising.Using commercial phosphors β-SiAlON:Eu^(2+)and K_(2)SiF6:Mn^(4+)as green and red light co nverte rs respectively,and the title phosphor as the blue light converters,the fabricated w-LED exhibits a wide color gamut of 82% NTSC.

关 键 词：Blue-emitting phosphor BasGeO_(4)Br_(6):Eu^(2+) Narrow band Phosphor-converted light-emitting diodes Field emission displays Rare earths 

分 类 号：TB34[一般工业技术—材料科学与工程]