LED teeb tau dhau los ua cov teeb pom kev zoo thoob plaws hauv tsev thiab kev lag luam, tab sis ib txwm LED tau sau lawv qhov tsis txaus thaum nws los txog rau qhov loj, siab daws teeb meem.LED zaubsiv high voltages thiab ib qho tseem ceeb hu ua internal zog conversion efficiency yog tsawg, uas txhais tau hais tias lub zog nqi ntawm khiav cov zaub yog siab, cov zaub lub neej tsis ntev, thiab nws yuav khiav kub heev.
Hauv ib daim ntawv luam tawm hauv Nano Kev Tshawb Fawb, cov kws tshawb fawb tau piav qhia txog yuav ua li cas kev ua haujlwm thev naus laus zis hu ua quantum dots tuaj yeem daws qee qhov teeb meem no.Quantum dots yog cov khoom siv hluav taws xob me me uas ua raws li cov khoom siv hluav taws xob.Vim lawv qhov loj me, lawv muaj cov khoom tshwj xeeb uas tuaj yeem ua rau lawv muaj txiaj ntsig zoo hauv kev siv thev naus laus zis.
Xing Lin, tus pab xibfwb ntawm cov ntaub ntawv tshawb fawb thiab hluav taws xob engineering ntawm Zhejiang University, tau hais tias ib txwm muajLED zaubtau muaj kev vam meej hauv kev lag luam xws li zaub, teeb pom kev zoo thiab kev sib txuas lus kho qhov muag.Txawm li cas los xij, cov txheej txheem siv kom tau txais cov khoom siv semiconductor zoo thiab cov khoom siv muaj zog heev thiab siv nyiaj ntau.Colloidal quantum dots muab ib txoj hauv kev zoo rau kev tsim cov LED ua haujlwm siab siv cov txheej txheem kev daws teeb meem pheej yig thiab cov khoom siv tshuaj lom neeg.Tsis tas li ntawd, raws li cov ntaub ntawv inorganic, colloidal quantum dots tshaj emissive organic semiconductors nyob rau hauv cov nqe lus ntawm kev ua hauj lwm mus sij hawm ntev stability.
Tag nrho cov LED zaub yog tsim los ntawm ntau txheej.Ib qho ntawm cov txheej txheem tseem ceeb tshaj plaws yog txheej emissive, qhov twg cov hluav taws xob hluav taws xob tau hloov mus ua cov yeeb yuj lub teeb.Cov kws tshawb fawb tau siv ib txheej ntawm quantum dots ua lub emission txheej.Feem ntau, cov colloidal quantum dot emission txheej yog lub hauv paus ntawm voltage poob vim tsis zoo conductivity ntawm colloidal quantum dot solids.Los ntawm kev siv ib txheej ntawm quantum dots li txheej emissive, cov kws tshawb fawb xav tias lawv tuaj yeem txo qhov voltage mus rau qhov siab tshaj plaws los ua kom muaj zog rau cov lus qhia no.
Lwm qhov tshwj xeeb ntawm quantum dots uas ua rau lawv zoo tagnrho rau LED yog tias lawv tuaj yeem tsim tau yam tsis muaj qhov tsis xws luag uas yuav cuam tshuam rau lawv cov txiaj ntsig.Quantum dots tuaj yeem tsim yam tsis muaj impurities thiab deg tsis xws luag.Raws li Lin, quantum dot LED (QLED) tuaj yeem ua tiav nyob ze-kev sib koom ua ke nrog lub zog hloov pauv tau zoo ntawm qhov tam sim no ntom ntom haum rau cov duab thiab teeb pom kev zoo.Cov pa LED raws li epitaxially zus semiconductors nthuav tawm kev ua haujlwm hnyav roll-off nyob rau hauv tib qhov ceev tam sim no.Nws yog qhov zoo rauLED zaub kev lag luam.Qhov sib txawv no tshwm sim los ntawm qhov tsis muaj qhov tsis xws luag ntawm cov khoom zoo quantum dots.
Tus nqi qis ntawm kev tsim cov khaubncaws sab nraud povtseg nrog quantum dots thiab lub peev xwm los siv cov txheej txheem kho qhov muag los txhim kho lub teeb pom kev zoo ntawm QLED, cov kws tshawb fawb xav tias, tuaj yeem txhim kho cov tsoos LED siv hauv teeb pom kev zoo, cov lus qhia, thiab ntau dua.Tab sis tseem muaj kev tshawb fawb ntxiv ntxiv, thiab QLED tam sim no muaj qee qhov tsis txaus uas yuav tsum tau kov yeej ua ntej lawv tuaj yeem siv dav.
Raws li Lin, kev tshawb fawb tau pom tias thermal zog tuaj yeem muab rho tawm los txhim kho kev ua haujlwm ntawm electro-optical zog hloov dua siab tshiab.Txawm li cas los xij, kev ua tau zoo ntawm cov khoom siv nyob rau theem no yog deb ntawm qhov zoo tshaj plaws hauv kev nkag siab ntawm kev ua haujlwm siab voltages thiab tsis tshua muaj tam sim no.Cov kev tsis muaj zog no tuaj yeem kov yeej los ntawm kev nrhiav cov khoom thauj zoo dua thiab tsim qhov sib cuam tshuam ntawm cov nqi thauj khoom thiab quantum dot txheej.Lub hom phiaj tseem ceeb - kom paub txog cov khoom siv hluav taws xob ua kom txias - yuav tsum yog QLED-raws li.
Post lub sij hawm: Sep-21-2022