Qhov sib txawv tseem ceeb ntawm photoluminescence thiab electroluminescence yog photoluminescence tshwm sim tom qab nqus ntawm photon, whereas electroluminescence tshwm sim los ntawm lub cim ntawm lub teeb los ntawm daim ntawv thov ntawm ib tug alternating tam sim no mus rau ib tug semiconductor.
Photoluminescence thiab electroluminescence yog ob hom luminescence. Luminescence yog emission ntawm lub teeb los ntawm ib yam khoom uas tsis tau rhuab. Nyob rau hauv sib piv, luminescence hom xws li fluorescence thiab phosphorescence tshwm sim los ntawm rhuab cev.
Photoluminescence yog dab tsi?
Photoluminescence yog ib daim ntawv ntawm luminescence uas tshwm sim nrog photoexcitation ntawm photon absorption. Lub teeb emission no tshwm sim thaum ib yam khoom absorbs electromagnetic radiation thiab re-emits cov hluav taws xob. Cov txheej txheem no pib nrog photoexcitation. Qhov no txhais tau hais tias cov electrons ntawm cov khoom raug excitations thaum cov khoom absorbs photons, thiab electrons txav mus rau siab zog xeev los ntawm qis zog xeev. Tom qab cov excitations, muaj cov txheej txheem so thiab. Nyob rau hauv cov kauj ruam so, photons yog re-radiated los yog emissions. Lub sij hawm nruab nrab ntawm qhov nqus thiab emission ntawm photons yuav txawv nyob ntawm seb cov khoom.
Daim duab 01: Kev daws teeb meem fluorescent nyob rau hauv UV Teeb
Muaj ntau hom photoluminescence uas txawv ntawm ib leeg raws li ob peb yam. Thaum xav txog lub wavelength ntawm absorbed thiab emission wavelengths ntawm photons, muaj ob hom loj li fluorescence thiab resonance fluorescence. Nyob rau hauv fluorescence, lub wavelength ntawm emitted tawg yog qis dua lub wavelength ntawm absorbed wavelength. Nyob rau hauv resonance fluorescence, lub absorbed thiab emission hluav taws xob muaj sib npaug wavelengths.
Electroluminescence yog dab tsi?
Electroluminescence yog ib qho tshuaj phenomenon uas cov khoom emits lub teeb raws li cov lus teb rau qhov kev nkag ntawm hluav taws xob tam sim no. Peb tuaj yeem sau nws li EL. Qhov no yog ob qho tib si optical phenomenon thiab hluav taws xob tshwm sim. Nws tuaj yeem tshwm sim nyob rau hauv lub xub ntiag ntawm hluav taws xob tam sim no los yog nyob rau hauv lub xub ntiag ntawm ib tug muaj zog hluav taws xob teb. Cov yam ntxwv no txawv ntawm lub cev dub lub teeb tawm uas tshwm sim los ntawm ib qho ntawm cov hauv qab no: tshav kub, tshuaj lom neeg, suab, thiab lwm yam kev ua haujlwm.
Daim duab 02: Spectrum ntawm Blue-Green Electroluminescence
Thaum xav txog cov txheej txheem ntawm electroluminescence, nws tshwm sim los ntawm hluav taws xob recombination ntawm electrons thiab qhov hauv cov khoom xws li semiconductor. Hauv cov txheej txheem no, cov electrons zoo siab yuav tso lawv lub zog hauv daim ntawv ntawm photons. Peb muaj peev xwm cais cov electrons thiab qhov ua ntej lub recombination txheej txheem los ntawm doping lub semiconductor nyob rau hauv thiaj li yuav tsim ib tug p-n hlws ris los yog los ntawm excitation los ntawm kev cuam tshuam ntawm high-zog electrons uas yog accelerated los ntawm ib tug muaj zog hluav taws xob teb..
Qhov txawv ntawm Photoluminescence thiab Electroluminescence yog dab tsi?
Luminescence yog qhov emission ntawm lub teeb los ntawm ib yam khoom uas tsis tau rhuab. Photoluminescence thiab electroluminescence yog ob hom luminescence. Qhov sib txawv tseem ceeb ntawm photoluminescence thiab electroluminescence yog tias photoluminescence tshwm sim tom qab nqus ntawm photon, whereas electroluminescence tshwm sim los ntawm lub cim ntawm lub teeb los ntawm daim ntawv thov ntawm ib tug alternating tam sim no mus rau ib tug semiconductor.
Daim duab hauv qab no qhia txog qhov sib txawv ntawm photoluminescence thiab electroluminescence hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Photoluminescence vs Electroluminescence
Luminescence yog qhov emission ntawm lub teeb los ntawm cov khoom uas tsis tau ua kom sov. Photoluminescence thiab electroluminescence yog ob hom luminescence. Qhov sib txawv tseem ceeb ntawm photoluminescence thiab electroluminescence yog photoluminescence tshwm sim tom qab nqus ntawm photon, whereas electroluminescence tshwm sim los ntawm lub cim ntawm lub teeb los ntawm daim ntawv thov ntawm ib tug alternating tam sim no mus rau ib tug semiconductor.
