Intshayelelo: I-Chen Shuming kunye nabanye abavela kwiYunivesithi yaseSouthern yeSayensi kunye neTeknoloji baye baphuhlisa uluhlu oludibeneyo lwe-quantum dot light-emitting diode ngokusebenzisa i-transparent conductive indium zinc oxide njenge-electrode ephakathi. I-diode inokusebenza phantsi kwemijikelezo yangoku echanekileyo kunye nembi, kunye ne-quantum yangaphandle ye-20.09% kunye ne-21.15%, ngokulandelanayo. Ukongeza, ngokudibanisa izixhobo ezininzi ezidibeneyo, iphaneli inokuqhutywa ngokuthe ngqo ngamandla e-AC asekhaya ngaphandle kwesidingo seesekethe ezintsonkothileyo zasemva. Ngaphantsi kwe-drive ye-220 V / 50 Hz, amandla okusebenza kweplagi ebomvu kunye nepaneli yokudlala yi-15.70 lm W-1, kunye nokukhanya okulungelelaniswayo kunokufikelela kwi-25834 cd m-2.
Ii-diodes ezikhanyayo ezikhanyayo (ii-LED) ziye zaba yitekhnoloji yokukhanya okuqhelekileyo ngenxa yokusebenza kwayo okuphezulu, ixesha elide lokuphila, i-slid-state kunye neenzuzo zokhuseleko lokusingqongileyo, ukuhlangabezana nemfuno yehlabathi yokusebenza kwamandla kunye nokugcinwa kokusingqongileyo. Njenge-semiconductor pn diode, i-LED inokusebenza kuphela phantsi komqhubi we-low-voltage ngqo yangoku (DC) umthombo. Ngenxa ye-unidirectional kunye ne-injection yentlawulo eqhubekayo, iintlawulo kunye nokufudumala kwe-Joule ziqokelela ngaphakathi kwesixhobo, ngaloo ndlela kunciphisa ukuzinza kokusebenza kwe-LED. Ukongezelela, ukunikezelwa kwamandla ehlabathi ngokubanzi kusekelwe kwi-high-voltage alternating current, kwaye izixhobo ezininzi zekhaya ezifana nezibane ze-LED azikwazi ukusebenzisa ngokuthe ngqo i-high-voltage alternating current. Ngoko ke, xa i-LED iqhutywa ngumbane wendlu, i-converter eyongezelelweyo ye-AC-DC iyafuneka njengomlamli ukuguqula amandla e-AC aphezulu kumandla ombane we-DC. Umguquleli oqhelekileyo we-AC-DC uquka i-transformer yokunciphisa i-voltage ye-mains kunye ne-rectifier circuit ukulungisa igalelo le-AC (jonga uMzobo 1a). Nangona uguqulo olusebenzayo lwabaninzi abaguquli be-AC-DC banokufikelela ngaphezulu kwe-90%, kusekho ukulahleka kwamandla ngexesha lenkqubo yokuguqula. Ukongezelela, ukulungelelanisa ukukhanya kwe-LED, isiphaluka sokuqhuba esizinikezeleyo kufuneka sisetyenziswe ukulawula umbane we-DC kunye nokubonelela ngokufanelekileyo ngoku kwi-LED (jonga i-Supplementary Figure 1b).
Ukuthembeka kwesekethe yomqhubi kuya kuchaphazela ukuqina kwezibane ze-LED. Ngoko ke, ukwazisa abaguquli be-AC-DC kunye nabaqhubi be-DC abafaki kuphela iindleko ezongezelelweyo (ibali malunga ne-17% yeendleko zesibane se-LED), kodwa kwandisa ukusetyenziswa kwamandla kunye nokunciphisa ukuqina kwezibane ze-LED. Ngoko ke, ukuphuhlisa izixhobo ze-LED okanye i-electroluminescent (EL) ezinokuqhutywa ngokuthe ngqo yindlu ye-110 V / 220 V ye-voltages ye-50 Hz / 60 Hz ngaphandle kwesidingo se-backend eyinkimbinkimbi izixhobo zombane zinqweneleka kakhulu.
Kwiminyaka embalwa edlulileyo, izixhobo ezininzi ze-AC-EL eziqhutywa nge-electroluminescent (AC-EL) ziye zaboniswa. I-AC ye-electronic ballast eqhelekileyo iquka umaleko we-fluorescent powder okhuphayo phakathi kweeleya ezimbini zokugquma (Figure 2a). Ukusetyenziswa kwe-insulation layer kuthintela ukutofa kwabathwali bentlawulo yangaphandle, ngoko ke akukho ngoku ngokuthe ngqo okuhamba ngesixhobo. Isixhobo sinomsebenzi we-capacitor, kwaye phantsi kwe-drive yentsimi yombane ye-AC ephezulu, ii-electron eziveliswa ngaphakathi ziyakwazi umzila ukusuka kwindawo yokubamba ukuya kwi-emission layer. Emva kokufumana amandla aneleyo e-kinetic, ii-electron zingqubana neziko le-luminescent, zivelisa i-excitons kunye nokukhanya okukhuphayo. Ngenxa yokungakwazi ukufaka i-electrons ngaphandle kwee-electrodes, ukukhanya kunye nokusebenza kakuhle kwezi zixhobo kuphantsi kakhulu, okukhawulela izicelo zabo kwiinkalo zokukhanyisa kunye nokubonisa.
Ukuze kuphuculwe ukusebenza kwayo, abantu baye baqulunqa ii-ballasts ze-elektroniki ze-AC ezinomaleko omnye wokugquma (jonga i-Supplementary Figure 2b). Kule sakhiwo, ngexesha lomjikelo wesiqingatha esilungileyo se-AC drive, i-carrier carrier ifakwe ngokuthe ngqo kwi-emission layer evela kwi-electrode yangaphandle; Ukukhutshwa kokukhanya okusebenzayo kunokubonwa ngokudibanisa kunye nolunye uhlobo lomthwali wentlawulo owenziwe ngaphakathi. Nangona kunjalo, ngexesha lomjikelo wesiqingatha esibi se-AC drive, abathwali bentlawulo ejojowe baya kukhutshwa kwisixhobo kwaye ke abayi kukhupha ukukhanya.Ngenxa yokuba ukukhutshwa kokukhanya kwenzeka kuphela ngexesha lomjikelo wesiqingatha sokuqhuba, ukusebenza kakuhle kwesi sixhobo se-AC. ingaphantsi kunaleyo yezixhobo zeDC. Ukongeza, ngenxa yeempawu ze-capacitance yezixhobo, ukusebenza kwe-electroluminescence kuzo zombini izixhobo ze-AC kuxhomekeke rhoqo, kwaye ukusebenza okugqibeleleyo kudla ngokufumaneka kumaza aphezulu e-kilohertz ezininzi, nto leyo eyenza kube nzima ukuhambelana namandla e-AC asekhaya asezantsi. iifrikhwensi (50 hertz/60 hertz).
Kutshanje, umntu wenze isindululo sesixhobo sombane se-AC esinokusebenza kumaza angama-50 Hz/60 Hz. Esi sixhobo sinezixhobo ze-DC ezimbini ezihambelanayo (jonga uMfanekiso 2c). Ngombane omfutshane wokujikeleza i-electrode ephezulu yezixhobo ezibini kunye nokudibanisa i-electrode ye-coplanar esezantsi kumthombo wamandla we-AC, ezi zixhobo zimbini zinokuvulwa ngokuhlukileyo. Ukusuka kumbono wesekethe, esi sixhobo se-AC-DC sifunyanwa ngokudibanisa isixhobo sangaphambili kunye nesixhobo esibuyela umva kuthotho. Xa isixhobo sangaphambili sivuliwe, isixhobo esibuyela umva siyacinywa, sisebenze njengesixhathisi. Ngenxa yobukho bokuchasana, ukusebenza kakuhle kwe-electroluminescence kuncinci. Ukongeza, izixhobo ezikhupha ukukhanya kwe-AC zinokusebenza kuphela kumbane ophantsi kwaye azikwazi ukudibanisa ngokuthe ngqo kunye ne-110 V / 220 V yombane oqhelekileyo wendlu. Njengoko kubonisiwe kwiFigure 3 eyoNgezelelweyo kunye neTheyibhile eyoNgezelelweyo 1, ukusebenza (ukukhanya kunye nokusebenza kakuhle kombane) kwezixhobo zamandla ezixeliweyo ze-AC-DC eziqhutywa ngamandla ombane we-AC aphezulu zisezantsi kunezo ze-DC. Ukuza kuthi ga ngoku, akukho sixhobo samandla se-AC-DC esinokuqhutywa ngokuthe ngqo ngumbane wendlu kwi-110 V / 220 V, 50 Hz / 60 Hz, kwaye inokusebenza okuphezulu kunye nobomi obude.
U-Chen Shuming kunye neqela lakhe elivela kwiYunivesithi yaseMazantsi yeNzululwazi kunye neTeknoloji baye baphuhlisa uchungechunge oludibeneyo lwe-quantum dot light-emitting diode usebenzisa i-transparent conductive indium zinc oxide njenge-electrode ephakathi. I-diode inokusebenza phantsi kwemijikelezo yangoku echanekileyo kunye nembi, kunye ne-quantum yangaphandle ye-20.09% kunye ne-21.15%, ngokulandelanayo. Ukongezelela, ngokudibanisa izixhobo ezininzi ezidibeneyo ezidibeneyo, iphaneli inokuqhutywa ngokuthe ngqo ngamandla e-AC yasekhaya ngaphandle kwemfuneko yeesekethe ze-backend eziyinkimbinkimbi.Ngaphantsi kwe-drive ye-220 V / 50 Hz, ukusebenza kakuhle kwamandla kweplagi ebomvu kunye nepaneli yokudlala yi-15.70 lm W-1, kunye nokukhanya okuhlengahlengiswayo kunokufikelela kwi-25834 cd m-2. Iplagi ephuhlisiweyo kunye nokudlala ipaneli ye-LED ye-quantum dot inokuvelisa ezoqoqosho, i-compact, esebenzayo, kunye nemithombo yokukhanya ezinzileyo ye-slid-state enokuxhaswa ngokuthe ngqo ngumbane we-AC wendlu.
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Ixesha lokuposa: Jan-14-2025