A novel broadband near-infrared phosphor NaBaScSi_(2)O_(7):Fe^(3+)and its application in pc-LED and night vision  

一种新型宽带近红外荧光粉NaBaScSi_(2)O_(7):Fe^(3+)及其在pc-LED和夜视方面的应用

作　　者：Changshuai Gong Ziying Wang Jjiantong Wang Xuyan Xue Xuejiao Wang 龚长帅;王子英;王建通;薛绪岩;王雪娇

机构地区：[1]College of Chemistry and Materials Engineering,Bohai University,Jinzhou 121007,China

出　　处：《Science China Materials》2025年第4期1074-1081,共8页中国科学(材料科学)(英文版)

基　　金：supported by the Natural Science Foundation of the Educational Department of Liaoning Province(Grant No.JYTMS20231627);the Natural Science Foundation of Liaoning Province(Grant No.2020-MS-286);the support from the"Young Talents Program"of Jinzhou。

摘　　要：In recent years,Fe^(3+)-doped near-infrared(NIR)phosphors have garnered significant attention,primarily due to their non-toxic nature,long emission wavelength,and excellent thermal stability.In this work,a series of NaBaScSi_(2)O_(7):xFe^(3+)(x=0.01-0.07)phosphors were synthesized by the conventional solid-state reaction method.The impact of Fe^(3+)doping on the bandgap of NaBaScSi_(2)O_(7)was analyzed by diffuse reflectance spectroscopy(DRS)and first-principles calculations.Under excitation at 301 nm,the series of phosphors emitted broadband NIR luminescence at 815 nm with full width at half maximum(FWHM)of 116 nm.Varying-temperature testing of the NaBaScSi_(2)O_(7):0.03Fe^(3+)phosphor indicated that it can retain 46%of its room temperature luminescence intensity at 423 K.This excellent thermal stability is attributed to the small Huang-Rhys factor(S),which results in weak electron-phonon coupling.In addition,the NIR phosphor-converted light-emitting diode(NIR pc-LED)integrated from the NaBaScSi_(2)O_(7):0.03Fe^(3+)optimal phosphor and a 310 nm ultraviolet(UV)chip showed a superior night vision capability.宽带近红外光谱技术由于其在各个领域的广泛应用而成为研究热点.近年来,以Fe^(3+)为激活剂的宽带近红外荧光粉由于无毒,长发射波长和优异的热稳定性引起了人们广泛关注.本工作采用普适的固相反应法合成了一系列NaBaScSi_(2)O_(7):x Fe^(3+)(x=0.01-0.07)荧光粉.通过漫反射光谱和第一性原理计算分析了Fe^(3+)掺杂对NaBaScSi_(2)O_(7)带隙的影响.在301 nm激发下,该系列荧光粉在815 nm处发射宽带近红外发光,半峰宽达到116 nm.NaBaScSi_(2)O_(7):0.03Fe^(3+)荧光粉的变温测试表明,在423 K时热稳定性仍保持室温的46%.这种优异的热稳定性归因于其较小的黄昆因子,导致了较弱的电子-声子耦合.此外,将NaBaScSi_(2)O_(7):0.03Fe^(3+)荧光粉和310 nm紫外芯片封装成的NIR pc-LED器件表现出优越的夜视能力.

关 键 词：broadband near-infrared luminescence Fe^(3+) thermal stability pc-LED 

分 类 号：O482.31[理学—固体物理]