可控結(jié)晶法優(yōu)化一種自還原體系新型紅色熒光粉的熱穩(wěn)定性

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Controllable Crystallization Optimizes Thermal Stability of A Novel Red-emitting Phosphor in Self-reduction System

Abstract：Thermalquenching（TQ）atelevated temperature isamajorfactorafecting theluminescent intensityand eficiencyof phosphors.Improving the thermal stabilityofphosphorsand weakening theTQeffectareofsignificance for the high-quality illumination of phosphor-converted WLEDs.Here，a novel red-emiting phosphor （20 issynthesized bystandard high temperaturesolid statereaction inambient atmosphere，whichisanew memberof self-reduction system.Anefective synthesis strategy is proposed tooptimize its photoluminescent performances. Combined with X-ray photoelectron spectroscopy and X-ray absorption fine structure spectroscopy，oxygen vacancy defects introducedby Mn doping are proved to play an important rolein the transition of . Thermoluminescenceanalysis revealsthatthedistributionoftraplevels，especiallythedeepones，is effectivelyregulated bythecontrollablecrystalizationandsignificantlyaffctthethermalstabilityofphosphors.Thenadefect-assistedmodelis proposed toaddress the inner mechanism of the phenomenon.The carriers trapped bydeep trap levelscan be released underthehigh-temperaturestimulus，which returnbacktotheluminescentcenters and participate intheradiative recombination toimprovethermal stability.Thisstudyprovidesanew crystalographicideaandtheoreticalsupportfor obtaining luminescent materialswith high thermal stability.

KeyWords：photoluminescence；lattice defects；self-reduction;thermal stability CLC number：O482.31 Document code：A DOI：10.37188/CJL.20240212 CSTR：32170.14.CJL.20240212

鹿詩為"，董瑞'，白宇星'，杜海紅1，鄭黎榮2，武莉1*，孔勇發(fā)1，許京軍1（1.南開大學(xué)物理科學(xué)學(xué)院，弱光非線性光子學(xué)教育部重點實驗室，天津300071；2.中國科學(xué)院高能物理研究所北京同步輻射裝置，北京100049）

摘要：高溫下熱猝滅（TQ）是影響熒光粉發(fā)光強度與發(fā)光效率的主要因素。（剩余28304字）