Kev tsim cov khoom siv hluav taws xob puv phosphors yog tus yuam sij rau cov tiam tom ntej ntawm cov khoom ua muaj lub ntsej muag zoo nkauj. Cov kws tshawb nrhiav los ntawm Finica University hauv tebchaws Nyablaj tau tshaj tawm cov xov tooj tshiab phosphor raws li cov khoom siv ib leeg-aluminium-doped zinc oxide phosphor. Nyob rau hauv qhov zam ntawm 325 nm ultraviolet lub teeb, ZnO: Al phosphor muaj cov duab hluav taws xob puv ntoob pom nyob rau hauv cov khoom ci uas pom tau los ntawm 400 txog 800 nm. Cov CIE chromaticity ua kom sib haum yog (0.42, 0.48), qhov ntsuas seb ua tau tiav ntau npaum li cas yog 43 %, thiab cov xim hloov ua piv txwv (CRI) Nws yog 74, qhov xim tsis sib luag (CCT) yog 3873 K, thiab lub zog ua kom zoo yog 0.22 eV Cov. Tsuas yog nrog qhov dav dav luminescent aluminium-doped zinc oxide phosphor, ib qho kev tso tawm hluav taws xob nrog CRI siab ntawm 87 thiab CCT ntawm 4067k tuaj yeem tau txais. Cov txiaj ntsig qhia tau tias qhov khoom tiv thaiv Al3+ ib leeg-doped sov dawb phosphor yog cov neeg sib tw zoo tshaj plaws rau cov khoom siv hluav taws xob dawb. Cov ntaub ntawv muaj feem xyuam tau tshaj tawm hauv phau ntawv xov xwm Dalton Kev Lag Luam nrog lub npe" Ib leeg-kev sib xyaw Al3+-singly doped ZnO phosphors rau UV-pumped sov dawb lub teeb emitting diode daim ntawv thov" ;.
Vim tias nws qhov me me, lub neej ntev, kev siv hluav taws xob ntau, lub sijhawm teb ceev ceev, kev txuag hluav taws xob thiab kev tiv thaiv ib puag ncig, dawb lub teeb ci ntsa iab (WLEDs) tau hloov maj mam hloov cov teeb pom kev zoo xws li cov teeb roj incandescent, teeb roj fluorescent (FL) lossis siab siab sodium. cov roj (HPS). Raws li peb txhua tus paub, qhov zoo ntawm lub teeb tau pom los ntawm ntau cov nuj nqis tseem ceeb ntawm kev ua tau zoo, suav nrog kev sib txheeb ze ntawm cov xim kub (CCT), luminous efficiency (LE) thiab cov xim hloov ua piv txwv (CRI). Ntawm lawv, CRI yog qhov tseem ceeb qhov ntsuas ntawm cov xim puv npo WLED, CRI tuaj yeem hloov pauv ntawm 0 txog 100; ntawm lawv, CRI tus nqi siab dua txhais tau tias ua kom zoo dua cov xim kom raug.
Xyoo tsis ntev los no, ib lo lus tshiab" tag nrho cov teeb pom kev zoo pom" tau dav siv thoob ntiaj teb. Nws qhia txog qhov siab CRI teeb meem loj uas tuaj yeem sim lub teeb ntuj. Feem ntau, kev ua lag luam WLEDs yog tsim los ntawm cov xim phosphor daj (YAG: Ce3+) ntawm xiav LED chips; txawm li cas los xij, vim tias tsis muaj cov cheeb tsam liab liab hauv thaj chaw pom, nws tsis tshua muaj CCT thiab CRI tsis zoo. Yuav kom kov yeej cov teeb meem no, ib txoj hauv kev yog siv cov UV-LED chips coated nrog xiav (B), ntsuab (G), thiab liab (R) phosphors. Txawm li cas los xij, vim tias kev kho dua reabsorption ntawm xiav lub teeb los ntawm cov xim liab thiab ntsuab phosphors, qhov tau txais WLED qhia tias tsis muaj teeb meem loj.
Yog li ntawd, kev txhim kho kom pom qhov pom kev zoo yog qhov tseem ceeb. Zinc oxide (ZnO) muaj qhov sib txawv loj loj ntawm 3.3-3.4eV, thiab qhov cuam tshuam ntawm lub zog muaj qhov siab txog 60 meV hauv chav sov. Nws tuaj yeem tso tawm lub teeb ci rau tag nrho ultraviolet / pom thaj av thiab pom tias yuav tsum tau siv dav hauv cov khoom siv photovoltaic xws li lub hnub ci hlwb thiab cov duab hluav taws xob. Nws tseem tau tshaj tawm tias cov khoom siv hlau-ZopO-cov ntaub ntawv xws li Mg-doped ZnO zaj duab xis, Ga-doped ZnO nanorods thiab Al thiab Mn-doped ZnO nanopowders tuaj yeem tau txais cov xim dawb. Txawm li cas los xij, micron-qhov loj me me feem ntau xav tau phosphors rau kev tsim cov cuab yeej hluav taws xob txuas ntxiv nrog lub teeb pom kev zoo dua. Yog li ntawd, tag nrho cov kev pom cov khoom hluav taws xob ib leeg-qib zinc oxide-based phosphor xav tau yuav siv los npaj ib puag ncig hauv WLEDs nrog kev ua haujlwm siab thiab CRI siab.
