Taw qhia: Chen Shuming thiab lwm tus los ntawm Southern University of Science thiab Technology tau tsim cov kev sib txuas ntawm quantum dot light-emitting diode los ntawm kev siv pob tshab indium zinc oxide ua cov khoom nruab nrab ntawm electrode. Lub diode tuaj yeem ua haujlwm nyob rau hauv qhov zoo thiab qhov tsis zoo hloov pauv tam sim no, nrog rau lwm qhov kev ua tau zoo ntawm 20.09% thiab 21.15%, feem. Tsis tas li ntawd, los ntawm kev sib txuas ntau cov khoom siv txuas nrog, lub vaj huam sib luag tuaj yeem raug tsav ncaj qha los ntawm tsev neeg AC lub zog yam tsis tas yuav tsum muaj cov txheej txheem rov qab. Nyob rau hauv lub tsav ntawm 220 V / 50 Hz, lub zog efficiency ntawm lub liab plug thiab ua si vaj huam sib luag yog 15.70 lm W-1, thiab adjustable brightness yuav ncav cuag mus txog rau 25834 cd m-2.
Lub teeb emitting diodes (LEDs) tau dhau los ua cov thev naus laus zis thev naus laus zis vim lawv cov kev ua haujlwm siab, kev ua neej ntev, kev ruaj ntseg thiab ib puag ncig zoo, ua tau raws li qhov xav tau thoob ntiaj teb rau kev siv hluav taws xob thiab kev ruaj ntseg ib puag ncig. Raws li ib qho semiconductor pn diode, LED tsuas tuaj yeem ua haujlwm raws li kev tsav tsheb ntawm qhov hluav taws xob qis hluav taws xob (DC) qhov chaw. Vim yog unidirectional thiab nruam tsub nqi txhaj tshuaj, tsub nqi thiab Joule cua sov sib sau ua ke nyob rau hauv lub ntaus ntawv, yog li txo cov kev ua hauj lwm stability ntawm lub LED. Tsis tas li ntawd, cov khoom siv hluav taws xob thoob ntiaj teb feem ntau yog ua raws li cov hluav taws xob hluav taws xob hloov pauv tam sim no, thiab ntau yam khoom siv hauv tsev xws li LED teeb tsis tuaj yeem siv hluav taws xob hloov hluav taws xob ncaj qha. Yog li ntawd, thaum LED tsav los ntawm hluav taws xob hauv tsev, ib qho ntxiv AC-DC converter yuav tsum yog tus neeg nruab nrab los hloov siab-voltage AC fais fab mus rau qhov qis-voltage DC fais fab. Ib tug raug AC-DC converter muaj xws li ib tug transformer rau txo lub mains voltage thiab ib tug rectifier Circuit Court rau rectifying AC input (saib daim duab 1a). Txawm hais tias kev hloov dua siab tshiab ntawm feem ntau AC-DC converters tuaj yeem ncav cuag tshaj 90%, tseem muaj zog poob thaum lub sij hawm hloov dua siab tshiab. Tsis tas li ntawd, txhawm rau kho qhov ci ntsa iab ntawm LED, lub zog tsav tsheb yuav tsum tau siv los tswj cov khoom siv hluav taws xob DC thiab muab qhov zoo tshaj plaws tam sim no rau LED (saib Daim Duab 1b).
Qhov kev ntseeg siab ntawm tus tsav tsheb Circuit Court yuav cuam tshuam rau lub zog ntawm LED teeb. Yog li ntawd, kev qhia AC-DC converters thiab DC tsav tsheb tsis tsuas yog ua rau cov nqi ntxiv (suav txog li 17% ntawm tag nrho cov nqi LED teeb), tab sis kuj ua rau kom muaj zog siv hluav taws xob thiab txo qhov ua haujlwm ntawm LED teeb. Yog li ntawd, tsim cov khoom siv LED lossis electroluminescent (EL) uas tuaj yeem tsav ncaj qha los ntawm tsev neeg 110 V / 220 V voltages ntawm 50 Hz / 60 Hz yam tsis tas yuav tsum muaj cov khoom siv hluav taws xob backend complex yog qhov xav tau.
Hauv ob peb lub xyoo dhau los, ntau lub AC tsav electroluminescent (AC-EL) cov khoom siv tau pom. Ib tug raug AC hluav taws xob ballast muaj fluorescent hmoov emitting txheej sandwiched ntawm ob txheej insulating (Daim duab 2a). Kev siv cov txheej rwb thaiv tsev tiv thaiv kev txhaj tshuaj ntawm cov neeg nqa khoom sab nraud, yog li tsis muaj qhov ncaj qha tam sim no ntws los ntawm lub cuab yeej. Cov cuab yeej muaj lub luag haujlwm ntawm lub capacitor, thiab nyob rau hauv lub tsav ntawm lub siab AC hluav taws xob teb, lub electrons generated nyob rau hauv lub qhov ntawm lub capture point mus rau lub emission txheej. Tom qab tau txais lub zog kinetic txaus, cov khoom siv hluav taws xob sib tsoo nrog lub teeb pom kev zoo, tsim cov excitons thiab emitting lub teeb. Vim tias tsis muaj peev xwm txhaj tshuaj electrons los ntawm sab nraud ntawm cov electrodes, qhov ci ntsa iab thiab kev ua haujlwm ntawm cov khoom siv no tau qis dua, uas txwv lawv cov ntawv thov hauv thaj chaw teeb pom kev zoo thiab tso saib.
Txhawm rau txhim kho nws cov kev ua tau zoo, tib neeg tau tsim AC hluav taws xob ballasts nrog ib txheej rwb thaiv tsev (saib Daim duab ntxiv 2b). Nyob rau hauv cov qauv no, thaum lub sij hawm zoo ib nrab voj voog ntawm AC tsav, ib tug nqi cab kuj yog ncaj qha mus rau hauv lub emission txheej los ntawm sab nraud electrode; Kev siv lub teeb pom kev zoo tuaj yeem pom los ntawm kev sib txuas nrog lwm hom khoom thauj khoom tsim tawm sab hauv. Txawm li cas los xij, thaum lub sij hawm tsis zoo ib nrab voj voog ntawm AC tsav, cov neeg nqa khoom ntim yuav raug tso tawm ntawm lub cuab yeej thiab yog li ntawd yuav tsis tawm lub teeb.Vim qhov tseeb tias lub teeb emission tsuas yog tshwm sim thaum lub sij hawm ib nrab ntawm kev tsav tsheb, qhov ua tau zoo ntawm cov khoom siv AC no. yog qis dua li ntawm cov khoom siv DC. Tsis tas li ntawd, vim muaj cov yam ntxwv ntawm cov khoom siv, qhov kev ua tau zoo ntawm electroluminescence ntawm ob lub AC cov khoom siv yog nyob ntawm qhov zaus, thiab qhov kev ua tau zoo tshaj plaws feem ntau ua tiav ntawm qhov siab ntawm ob peb kilohertz, uas ua rau lawv nyuaj rau kev sib haum nrog cov qauv hauv tsev AC fais fab tsawg. zaus (50 hertz / 60 hertz).
Tsis ntev los no, ib tus neeg tau thov cov khoom siv hluav taws xob AC uas tuaj yeem ua haujlwm ntawm zaus ntawm 50 Hz / 60 Hz. Cov cuab yeej no muaj ob qho tib si DC thaum uas tig mus (saib daim duab 2c). Los ntawm hluav taws xob luv luv Circuit Court rau sab saum toj electrodes ntawm ob lub cuab yeej thiab txuas hauv qab coplanar electrodes mus rau AC lub zog, ob lub cuab yeej tuaj yeem hloov pauv. Los ntawm qhov kev xav ntawm lub voj voog, qhov khoom siv AC-DC no tau txais los ntawm kev sib txuas rau pem hauv ntej thiab cov cuab yeej rov qab hauv koob. Thaum lub cuab yeej rau pem hauv ntej qhib, lub cuab yeej rov qab raug muab tua, ua raws li tus neeg tiv thaiv. Vim muaj qhov tsis kam, electroluminescence efficiency kuj tsawg. Tsis tas li ntawd, cov khoom siv hluav taws xob AC tsuas tuaj yeem ua haujlwm ntawm qhov tsis tshua muaj hluav taws xob thiab tsis tuaj yeem txuas ncaj qha nrog 110 V / 220 V tus qauv hluav taws xob hauv tsev. Raws li pom nyob rau hauv Ntxiv Daim duab 3 thiab Cov Lus Qhia Ntxiv 1, qhov kev ua tau zoo (kev ci ntsa iab thiab lub zog ua haujlwm) ntawm AC-DC lub zog hluav taws xob uas tau tsav los ntawm AC voltage siab yog qis dua li ntawm DC cov khoom siv. Txog tam sim no, tsis muaj AC-DC lub zog hluav taws xob uas tuaj yeem tsav ncaj qha los ntawm tsev neeg hluav taws xob ntawm 110 V / 220 V, 50 Hz / 60 Hz, thiab muaj kev ua haujlwm siab thiab ua haujlwm ntev.
Chen Shuming thiab nws pab neeg los ntawm Southern University of Science thiab Technology tau tsim ib qho kev sib txuas ntawm quantum dot light-emitting diode siv pob tshab conductive indium zinc oxide raws li qhov nruab nrab electrode. Lub diode tuaj yeem ua haujlwm nyob rau hauv qhov zoo thiab qhov tsis zoo hloov pauv tam sim no, nrog rau lwm qhov kev ua tau zoo ntawm 20.09% thiab 21.15%, feem. Tsis tas li ntawd, los ntawm kev sib txuas ntau cov khoom siv txuas nrog, lub vaj huam sib luag tuaj yeem raug tsav ncaj qha los ntawm tsev neeg AC lub zog yam tsis tas yuav tsum muaj cov txheej txheem backend circuits.Nyob rau hauv lub tsav ntawm 220 V / 50 Hz, lub zog ua haujlwm ntawm lub liab ntsaws thiab ua si vaj huam sib luag yog 15.70 lm W-1, thiab kho qhov ci tuaj yeem ncav cuag 25834 cd m-2. Kev tsim cov ntsaws thiab ua si quantum dot LED vaj huam sib luag tuaj yeem tsim kev lag luam, kev cog lus, ua haujlwm zoo, thiab ruaj khov-lub xeev lub teeb ci uas tuaj yeem siv ncaj qha los ntawm tsev neeg AC hluav taws xob.
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Post lub sij hawm: Jan-14-2025