Isingeniso: U-Chen Shuming kanye nabanye abavela e-Southern University of Science and Technology benze uchungechunge oluxhunywe i-quantum dot light-emitting diode ngokusebenzisa i-transparent conductive indium zinc oxide njenge-electrode ephakathi. I-diode ingasebenza ngaphansi kwemijikelezo yamanje eshintshanayo emihle nengalungile, ngokusebenza ngempumelelo kwe-quantum yangaphandle engu-20.09% no-21.15%, ngokulandelana. Ngaphezu kwalokho, ngokuxhuma amadivaysi amaningi axhunyiwe ochungechunge, iphaneli ingashayelwa ngokuqondile amandla e-AC asendlini ngaphandle kwesidingo samasekhethi angemuva ayinkimbinkimbi. Ngaphansi kokushayela okungu-220 V/50 Hz, ukusebenza kahle kwamandla kwepulaki ebomvu nephaneli yokudlala ngu-15.70 lm W-1, futhi ukukhanya okulungiswayo kungafinyelela kufikela ku-25834 cd m-2.
Ama-Light emitting diode (ama-LED) asephenduke ubuchwepheshe bokukhanyisa obujwayelekile ngenxa yokusebenza kahle kwawo okuphezulu, ubude besikhathi eside bempilo, izinzuzo zesimo esiqinile kanye nokuphepha kwemvelo, ahlangabezana nesidingo somhlaba wonke sokusebenza kahle kwamandla nokusimama kwemvelo. Njenge-semiconductor pn diode, i-LED ingasebenza kuphela ngaphansi kwedrayivu yomthombo wamanje oqondile we-low-voltage (DC). Ngenxa yomjovo wokushaja ongaqondile kanye noqhubekayo, amashaji kanye nokushisisa kwe-Joule kunqwabelana ngaphakathi kwedivayisi, ngaleyo ndlela kunciphisa ukuqina kokusebenza kwe-LED. Ukwengeza, ukunikezwa kwamandla kagesi emhlabeni jikelele kusekelwe ikakhulukazi kugesi oshintshashintshayo wamandla kagesi aphezulu, futhi izinto eziningi zikagesi zasendlini njengezibani ze-LED azikwazi ukusebenzisa ngokuqondile amandla ashintshashintshayo anamandla kagesi aphezulu. Ngakho-ke, lapho i-LED ishayelwa ugesi wasendlini, isiguquli esengeziwe se-AC-DC siyadingeka njengomxhumanisi ukuze kuguqule amandla e-AC anamandla kagesi abe amandla aphansi we-DC. Isiguquli esijwayelekile se-AC-DC sihlanganisa i-transformer yokunciphisa i-voltage yamapayipi kanye nesekhethi yokulungisa kabusha okokufaka kwe-AC (bona Umfanekiso 1a). Nakuba ukusebenza kahle kokuguqulwa kweziguquli eziningi ze-AC-DC kungafinyelela ngaphezu kuka-90%, kusenokulahleka kwamandla ngesikhathi senqubo yokuguqula. Ukwengeza, ukulungisa ukukhanya kwe-LED, umjikelezo wokushayela ozinikele kufanele usetshenziselwe ukulawula ukunikezwa kwamandla kagesi we-DC futhi unikeze amandla amanje afanelekile e-LED (bona Umfanekiso Ongeziwe 1b).
Ukuthembeka kwesekethe yomshayeli kuzothinta ukuqina kwezibani ze-LED. Ngakho-ke, ukwethula iziguquli ze-AC-DC kanye nabashayeli be-DC akungeni nje kuphela izindleko ezengeziwe (ukubala cishe u-17% wezindleko zesibani se-LED esiphelele), kodwa futhi kwandisa ukusetshenziswa kwamandla futhi kunciphisa ukuqina kwezibani ze-LED. Ngakho-ke, ukwakhiwa kwemishini ye-LED noma ye-electroluminescent (EL) engashayelwa ngokuqondile ama-voltage asendlini angu-110 V/220 V angu-50 Hz/60 Hz ngaphandle kwesidingo sezinto eziyinkimbinkimbi ze-electronic backend kuyinto efiselekayo kakhulu.
Emashumini ambalwa eminyaka adlule, kuye kwaboniswa amadivaysi amaningana aqhutshwa yi-AC-electroluminescent (AC-EL). I-ballast ye-electronic ye-AC evamile iqukethe ungqimba olukhiphayo lwempushana olukhanyayo phakathi kwezingqimba ezimbili ezivikelayo (Umfanekiso 2a). Ukusetshenziswa kwesendlalelo se-insulation kuvimbela umjovo wabathwali beshaja yangaphandle, ngakho-ke akukho okwamanje okuqondile okugeleza kudivayisi. Idivayisi inomsebenzi we-capacitor, futhi ngaphansi kokushayela kwenkundla kagesi ye-AC ephezulu, ama-electron akhiqizwe ngaphakathi angadonsa ukusuka endaweni yokuthwebula kuya kungqimba lokukhishwa. Ngemva kokuthola amandla e-kinetic anele, ama-electron ashayisana nesikhungo se-luminescent, akhiqize ama-exciton kanye nokukhanya okukhiphayo. Ngenxa yokungakwazi ukujova ama-electron angaphandle kwama-electrode, ukukhanya nokusebenza kahle kwalawa madivayisi kuphansi kakhulu, okukhawulela ukusetshenziswa kwawo emikhakheni yokukhanyisa nokubonisa.
Ukuze kuthuthukiswe ukusebenza kwayo, abantu baklame ama-ballast e-electronic e-AC anesendlalelo esisodwa sokuhlukanisa (bona Umfanekiso Owengeziwe 2b). Kulesi sakhiwo, phakathi nomjikelezo omuhle wesigamu sedrayivu ye-AC, isithwali sokushaja sijovwe ngokuqondile kungqimba lokukhishwa okuvela ku-electrode yangaphandle; Ukukhishwa kokukhanya okusebenzayo kungabonwa ngokuphinda kuhlanganiswe nolunye uhlobo lwesithwali sokushaja esikhiqizwe ngaphakathi. Kodwa-ke, phakathi nomjikelezo ongemuhle wesigamu sedrayivu ye-AC, izithwali zokushaja ezijovwe zizokhishwa kudivayisi ngakho-ke ngeke zikhiphe ukukhanya.Ngenxa yokuthi ukuphuma kokukhanya kwenzeka kuphela phakathi nomjikelezo oyingxenye yokushayela, ukusebenza kahle kwalolu cingo lwe-AC iphansi kunaleyo yamadivayisi e-DC. Ngaphezu kwalokho, ngenxa yezimpawu ze-capacitance yamadivayisi, ukusebenza kwe-electroluminescence yawo womabili amadivaysi e-AC kuncike kakhulu kuma-frequency, futhi ukusebenza kahle ngokuvamile kufinyelelwa kumafrikhwensi aphezulu ama-kilohertz ambalwa, okuwenza kube nzima ukusebenzisana namandla ajwayelekile e-AC asendlini aphansi. amafrikhwensi (50 hertz/60 hertz).
Muva nje, othile uhlongoze idivayisi kagesi ye-AC engasebenza kumafrikhwensi angu-50 Hz/60 Hz. Lolu cingo luqukethe amadivaysi e-DC amabili afanayo (bheka uMdwebo 2c). Ngokuzungeza ngogesi ama-electrode aphezulu emishini emibili nokuxhuma ama-electrode e-coplanar aphansi kumthombo wamandla we-AC, la madivayisi womabili angavulwa ngokushintshana. Ngokombono wesifunda, le divayisi ye-AC-DC itholwa ngokuxhuma idivayisi eya phambili kanye nedivayisi ehlehlayo ochungechungeni. Uma idivayisi yokudlulisela phambili ivuliwe, idivayisi ebuyela emuva iyavalwa, isebenze njenge-resistor. Ngenxa yobukhona bokumelana, ukusebenza kahle kwe-electroluminescence kuphansi kakhulu. Ngaphezu kwalokho, amadivayisi akhipha ukukhanya kwe-AC angasebenza kuphela kugesi ophansi futhi awakwazi ukuhlanganiswa ngokuqondile nogesi wasendlini ojwayelekile ongu-110 V/220 V. Njengoba kuboniswe kuMfanekiso Owengeziwe wesi-3 nakuThebula Lokwengeza 1, ukusebenza (ukukhanya nokusebenza kahle kwamandla) kwamadivayisi kagesi e-AC-DC okubikiwe ashayelwa amandla kagesi aphezulu e-AC kungaphansi kwalokho kwamadivayisi e-DC. Kuze kube manje, ayikho idivayisi yamandla ye-AC-DC engashayelwa ngokuqondile ugesi wasendlini ku-110 V/220 V, 50 Hz/60 Hz, futhi inokusebenza kahle okuphezulu nempilo ende.
U-Chen Shuming nethimba lakhe abavela e-Southern University of Science and Technology benze uchungechunge oluxhunywe i-quantum dot light-emitting diode besebenzisa i-transparent conductive indium zinc oxide njenge-electrode emaphakathi. I-diode ingasebenza ngaphansi kwemijikelezo yamanje eshintshanayo emihle nengalungile, ngokusebenza ngempumelelo kwe-quantum yangaphandle engu-20.09% no-21.15%, ngokulandelana. Ukwengeza, ngokuxhuma amadivaysi amaningi axhunyiwe ochungechunge, iphaneli ingashayelwa ngokuqondile amandla e-AC asendlini ngaphandle kwesidingo samasekethe angemuva ayinkimbinkimbi.Ngaphansi kwedrayivu engu-220 V/50 Hz, ukusebenza kahle kwamandla kwepulaki ebomvu nephaneli yokudlala ngu-15.70 lm W-1, nokukhanya okulungiswayo kungafinyelela ku-25834 cd m-2. Ipulaki ethuthukisiwe kanye nephaneli ye-LED yechashazi le-quantum ingakhiqiza imithombo yokukhanya yesimo esiqinile eyongayo, ehlangene, esebenza kahle futhi ezinzile enganikwa amandla ngokuqondile ugesi we-AC wasendlini.
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Isikhathi sokuthumela: Jan-14-2025