Tsis ntev los no, ib pab neeg tshawb fawb los ntawm Department of Advanced Laser thiab Optoelectronic Functional Materials thiab Department of Airborne Laser Technology thiab Systems, Shanghai Institute of Optics thiab Precision Machinery, Suav Academy ntawm Kev Tshawb Fawb, tau ua tiav hauv kev tshawb fawb ntawm cov khoom siv hluav taws xob ua haujlwm siab. siv nyob rau hauv lub teeb dawb LED / LD teeb pom kev zoo, thiab cov txiaj ntsig cuam tshuam tau sau tseg hauv lub npe ntawm "Kev Tshawb Fawb ntawm cov thermally robust txiv kab ntxwv-liab. MgO-YMASG: Ce composite phosphor ceramic rau dawb lub teeb LED / LD illumination" thiab "Fabrication ntawm Al2O3 Ce: (Y, Tb) 3 (Al, Mn) 5O12 composite ceramic phosphors rau cov xim siab rendering dawb LED / LD illumination" thiab ' Fabrication of Al2O3-Ce: (Y, Tb)3(Al, Mn) 5O12 composite ceramic phosphors rau cov xim siab rendering dawb LED / LD illumination' tau luam tawm nyob rau hauv Phau ntawv Journal of Alloys thiab Compounds thiab Optical Materials, feem.
Nyob rau hauv xyoo tas los no, fluorescence-hloov dawb lub teeb-emitting diodes (WLEDs) thiab dawb laser diodes (WLDs) raws li YAG: Ce phosphors tau lug siv nyob rau hauv lub teeb pom kev zoo thiab zaub teb vim lawv lub zog txuag, environmentally friendly, me me. , thiab lub neej ua haujlwm ntev. Ntawm lawv, Ce: YAG fluorescent ceramics raug suav tias yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob hloov pauv hauv WLED / WLD cov cuab yeej vim lawv cov kev ua haujlwm siab luminous, kev ruaj ntseg tshuaj zoo thiab cov txheej txheem kev npaj yooj yim. Txawm li cas los xij, raws li lub zog ua haujlwm ntawm xiav LEDs thiab LDs nce, YAG: Ce phosphor ceramics yuav raug kev txom nyem los ntawm thermal tawg tshwm sim thiab yog li txo lawv cov luminescence efficiency. Lub caij no, qhov tsis muaj xim liab nyob rau hauv emission spectrum ntawm YAG: Ce ua rau nws qis xim rendering Performance index (CRI). Yog li ntawd, yuav ua li cas txo cov thermal tawg tshwm sim thiab txhim kho luminescence kev ua tau zoo ntawm fluorescent ceramics nyob rau hauv siab zog excitation tau dhau los ua ob qho kev sib tw loj.
Fig. 1. Qhov kub thiab txias ntawm thermal diffusivity (a), muaj peev xwm kub (b) thiab thermal conductivity (c) ntawm MgO- YMASG: Ce composite theem phosphor ceramics
Daim duab 2. Dawb LED emission spectra (a), luminescence efficiency thiab xim kub (b) ntawm MgO- YMASG: Ce phosphor ceramics, thiab dawb LD emission spectra (c) ntawm 30 ntawm% MgO qauv
Hauv [Journal of Alloys and Compounds 990, 174436 (2024)] txoj hauj lwm no, pab neeg tshawb fawb tau ua tiav tau npaj MgO-Y3Mg2AlSi2O12: Ce composite-theem fluorescent ceramics los ntawm lub tshuab nqus tsev-theem sintering. Nws tau pom tias MgO tuaj yeem koom ua ke nrog YMASG theem, thiab kev qhia txog MgO raws li theem thib ob tau txo qis kev tsim ntawm Y4MgSi3O13 impurities. Nrog rau qhov nce ntawm MgO cov ntsiab lus, cov thermal conductivity ntawm cov qauv tau nce los ntawm 5.13 W / (m∙K) mus rau 8.96 W / (m∙K), uas zoo txo cov thermal tsub zuj zuj ntawm cov ntaub ntawv fluorescent nyob rau hauv high-power xiav LED / LD kev zoo siab. Lub luminescence efficiency ntawm cov qauv yog piv rau cov YMASG: Ce phosphor ceramics ntawm MgO cov ntsiab lus ntawm 30 wt%. Qhov no qhia tau tias MgO txhim kho lub teeb pom kev zoo ntawm cov phosphor ceramics sib xyaw. Txoj kev tshawb no qhia tias MgO- YMASG: Ce composite phosphor ceramics tau cog lus tias yog cov khoom siv liab phosphor rau high-power dawb LED / LD teeb pom kev zoo.
Hauv kev ua haujlwm no [Optical Materials 151, 115397 (2024)], pab pawg tshawb fawb tau npaj Al2O3-Ce: (Y, Tb)3(Al, Mn)5O12 composite theem fluorescent ceramics los ntawm lub tshuab nqus tsev twj-theem sintering, thiab tau qhia Tb3+ txhawm rau txhawm rau txo cov xim kub ntawm cov ceramics thaum doping Mn{10}} txhawm rau txhim kho nws xim rendering index. Tb3+ yog qhia los inhibit qhov kub ntawm xim, thiab theem thib ob ntawm Al2O3 yog qhia los txo cov thermal tawg tshwm sim zoo. Nyob rau hauv laser thiab LED excitation, cov ceramics nrog 3 ntawm% Ce3+ thiab 4 ntawm% Mn2+ qhia qhov siab tshaj CRI qhov tseem ceeb. Ntawm lawv, CRI mus txog 75.6 nyob rau hauv laser excitation thiab 81.3 nyob rau hauv LED excitation.Qhov kev ua hauj lwm no qhia tau hais tias los ntawm cov khoom optimization, Ce-Mn-Tb co-doping tuaj yeem txhim kho cov xim rendering Performance index ntawm composite-theem fluorescent ceramics thiab txo qhov tshwm sim ntawm. xim kub nce, thiab cov kev tshawb pom no tseem ceeb heev rau kev txhim kho WLED / WLD teeb pom kev zoo khoom siv.
Fig. 3. WLED (a) thiab WLD (b)(c) kev ua tau zoo ntawm Al2O3-Ce: (Y, Tb)3(Al, Mn)5O12 composite-phase fluorescent ceramics raws li 3 ntawm% Ce{ {8}} concentration
