发光学报2023，Vol.44Issue(12)：2158-2167,10.DOI:10.37188/CJL.20230218
宽带近红外荧光粉KScP2O7:Cr3+的发光特性研究及近红外LED器件应用
Luminescence Properties of KScP2O7:Cr3+ Broadband Near-infrared Phosphor and Application of Near-infrared LED Device
摘要
Abstract
The miniaturization and enhanced intelligence of near infrared(NIR)devices have stimulated the de-sign and advancement of high-efficiency broadband NIR phosphors.It is widely believed that multisite co-occupancy strategy by Cr3+ ions is a very effective method for designing broadband near-infrared phosphors.However,Cr3+ ions at different crystallographic sites often exhibit distinct thermal-quenching behaviors,leading to poor spectral stabili-ty,which hampers their practical applications.In our work,we prepared a series of KSc1-xP2O7:xCr3+(x = 0.01-0.09)broadband NIR phosphors via the high temperature solid-state method using the one-site occupation strategy.The crystal structure,luminescence performance and thermal quenching mechanism of KSc1-xP2O7:x Cr3+ were inves-tigated in detail.At x = 0.03,the luminescence intensity of KSc0.97P2O7:0.03Cr3+(KSP:0.03Cr3+)reaches its maxi-mum.The concentration quenching appears when x exceeds 0.03,which is attributable to energy transfer between adjacent Cr3+-Cr3+.Under blue light excitation of～471 nm,the KSP:0.03Cr3+ phosphor exhibits a broadband emis-sion ranging from 700 nm to 1 200 nm,with a peak centered at 857 nm and a full width at half-maximum(FWHM)of～149 nm.Structural analysis and low temperature spectroscopy indicate that the broadband NIR emission originate from Cr3+ occupying a single Sc3+ site with the weak crystal field(Dq/B = 1.98)in the KSP host.At 373 K,the inte-grated emission intensity of KSP:0.03Cr3+ sample keeps 60.2％of that at room temperature,suggesting good PL ther-mal stability.Finally,we prepared a near-infrared phosphor-converted LED device(NIR pc-LED)by utilizing the KSP:0.03Cr3+ NIR phosphor and a blue light LED chip,and confirm its potential applications in night vision,bio-medical imaging,and food detection.关键词
近红外荧光粉/单格位占据策略/宽带发射/Cr3+掺杂/NIR pc-LEDKey words
near-infrared phosphor/one-site occupation strategy/broadband emission/Cr3+/NIR pc-LED分类
数理科学引用本文复制引用
马子婷,张先哲,戴鹏鹏,沈丽娜..宽带近红外荧光粉KScP2O7:Cr3+的发光特性研究及近红外LED器件应用[J].发光学报,2023,44(12):2158-2167,10.基金项目
国家自然科学基金(62264014,52262029,51762040) （62264014,52262029,51762040）
新疆维吾尔自治区自然科学基金(2021D01E19,2022TSY-CXC0016) （2021D01E19,2022TSY-CXC0016）
新疆师范大学青年科技创新人才项目(XJNUQB2022-15) （XJNUQB2022-15）
新疆维吾尔自治区研究生科研创新项目(XSY202201013)Supported by National Natural Science Regional Foundation of China(62264014,52262029,51762040) （XSY202201013）
Natural Science Foun-dation of Xinjiang Uygur Autonomous Region(2021D01E19,2022TSYCXC0016) （2021D01E19,2022TSYCXC0016）
Project of Youth Science and Technology In-novation Talent Project of Xinjiang Normal University(XJNUQB2022-15) （XJNUQB2022-15）
Postgraduate Research and Innovation Project of Xinjiang Uygur Autonomous Regions(XSY202201013) （XSY202201013）
