AI共掺杂对植物照明用深红荧光粉Ca₂YTaO₆ :Mn4的荧光增强效应

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关键词：高温固相法；Al共掺杂；荧光增强； Ca2YTaO6 ；晶体场强度中图分类号：0482.31 文献标识码：ADOI：10.37188/CJL.20250186 CSTR：32170.14.CJL.20250186

Abstract：Addressing the challenge of insuficient luminous effciency in deep-red phosphors for plant lighting applications，this study proposes a novel strategyutilising Al co-doping to enhance luminescence performance.Phosphors with varying concentrations of Mn4+ and Al3+ dopants，namely Ca2YTa1-xO6： xMn4+ （x=0.1%-0.6%）and CaYTa1-0.3%-yO6：0.3%Mn，yAl3（y=0.4%-2.4%），were synthesized viathehigh-temperaturesolid-statereaction method.The enhancement mechanism induced by Al3+ co-doping was systematically investigated through X-ray difraction（XRD），photoluminescence（PL）spectroscopy，and fluorescence decay analysis.Results demonstrate thatunder 304 nm excitation，the single-doped CYTO ÷0 3%Mn4+ phosphor exhibited the maximum deep-red emission intensity. Co-doping withAlsignificantlyaugmentedthis intensity，achievinganintensity enhancedto5.92 times thatofCYTO： （20 0.3%Mn4+ at the optimal Al 13+ concentration of 1.2% .Analysis reveals that Als+ effectively suppresses concentration quenching between Mn4+ ions，reduces the population of quenching centers and lattice defects，and consequently diminishestherateofnonradiative transitions.Concurrntly，itmarkedlyintensifies thecrystalfieldstrength experienced by （204号 Mn4+ ions，therebyelevating the radiative transitionprobabilityfrom the 2Eg level and enhancing luminescence.Furthermore，co-doping didnotsignificantlycompromise the thermal stabilityof the phosphor.The electroluminescence（EL） spectrumofthe phosphor-convertedLED（pc-LED）packaged witha365 nmchipexhibitsarelativelyhigh matchingdegree with the absorption band of plant phytochrome Pfr . It possesses high luminous intensity and color purity，endowing such phosphors with favorable potential application value inthe field of indoor plant lighting.

Key words：high-temperature solid-state method；Al’ co-doping；luminescent enhancement; Ca2YTa06 ；crystal field strength

1引言

随着智慧农业的快速发展，人工光源在其中的战略地位日益凸显]。（剩余22144字）