Ukuhlaziywa kwemizila yobuchwepheshe eyinhloko yama-LED amhlophe okukhanyisa
Izinhlobo ze-LED ezimhlophe: Imizila yobuchwepheshe eyinhloko yama-LED amhlophe okukhanyisa yilezi: 1 i-LED eluhlaza okwesibhakabhaka + uhlobo lwe-phosphor; Uhlobo lwe-LED lwe-2RGB; 3 ultraviolet LED + uhlobo phosphor
1. I-chip ye-Blue-LED + uhlobo lwe-phosphor oluphuzi-luhlaza luhlanganisa okuphuma kokuphuma kwe-phosphor okunemibala eminingi
Ungqimba lwe-phosphor oluphuzi lumunca ingxenye yokukhanya okuluhlaza okwesibhakabhaka kwe-chip ye-LED ukuze kukhiqizwe i-photoluminescence, futhi enye ingxenye yokukhanya okuluhlaza okwesibhakabhaka okuvela ku-chip ye-LED idlulisa ungqimba lwe-phosphor futhi ihlangane nokukhanya okuphuzi-okuluhlaza okukhishwa i-phosphor at. amaphuzu ahlukahlukene esikhaleni, kanye nokukhanya okubomvu, okuluhlaza okwesibhakabhaka nokuluhlaza kuyaxutshwa ukwenza ukukhanya okumhlophe; Ngale ndlela, inani eliphakeme kakhulu lethiyori le-photoluminescence yokuguqulwa kwe-photoluminescence ye-quantum ephumelelayo yangaphandle ngeke idlule i-75%; futhi izinga lokukhishwa kwe-chip luminescence lingafinyelela kuphela cishe ku-70%, ngakho-ke, ngokombono, ukukhanya okuluhlaza okwesibhakabhaka kumhlophe. Ukusebenza kahle kokukhanya kwe-LED ngeke kudlule ku-340 Lm/W, i-CREE ifinyelele ku-303Lm/W eminyakeni edlule, futhi kufanelekile ukugubha uma imiphumela yokuhlolwa inembile.
2, Okubomvu, okuluhlaza okwesibhakabhaka nohlaza okwesibhakabhaka inhlanganisela yemibala emithathu eyinhloko yohlobo lwe-RGB ye-LED ehlanganisa uhlobo lwe-RGBW-LED, njll.
I-R-LED (bomvu) + G-LED (eluhlaza okotshani) + B- I-LED (eluhlaza okwesibhakabhaka) Ama-LED amathathu ahlanganisiwe, futhi ukukhanya okubomvu, okuluhlaza okwesibhakabhaka kwemibala emithathu eyinhloko kuxutshwe ngokuqondile esikhaleni ukuze kwakhe ukukhanya okumhlophe. Ukuze kukhiqizwe ukukhanya okumhlophe okusebenza kahle kakhulu ngale ndlela, okokuqala, ama-LED emibala ehlukahlukene, ikakhulukazi ama-LED aluhlaza, kufanele abe yimithombo yokukhanya esebenza kahle kakhulu, ebonakala cishe ngo-69% "ekukhanyeni okumhlophe kwamandla". ukusebenza kahle kwama-LED aluhlaza okwesibhakabhaka nokubomvu kuye kwaba phezulu kakhulu, futhi ukusebenza kahle kwe-quantum yangaphakathi kungaphezu kuka-90% no-95%, ngokulandelana, kodwa ukusebenza kahle kwe-quantum yangaphakathi kwama-LED aluhlaza kusemuva kakhulu. Isimanga sokuthi ukukhanya okuluhlaza kwe-LED okusekelwe ku-GaN akusebenzi kahle kubizwa ngokuthi "igebe lokukhanya okuluhlaza." Isizathu esiyinhloko ukuthi i-LED eluhlaza ayitholanga impahla yayo ye-epitaxial. Izinto ezikhona zochungechunge lwe-phosphorous-arsenic nitride zisebenza kahle kakhulu kububanzi obuphuzi-oluhlaza okotshani, futhi ukukhanya okubomvu noma okuluhlaza okwesibhakabhaka kwe-epitaxial impahla isetshenziselwa ukwenza i-LED eluhlaza. Ezimweni eziphansi zokuminyana zamanje, ama-LED aluhlaza anamandla okukhanya okuphezulu kunokukhanya okuluhlaza okwesibhakabhaka + kwe-phosphor okuluhlaza ngenxa yokulahlekelwa ukuguqulwa kwe-phosphor. Kubikwa ukuthi ukusebenza kahle okukhanyayo kufinyelela ku-291 Lm / W ku-1 mA. Nokho, umphumela wokukhanya wokukhanya okuluhlaza okubangelwa umphumela we-Droop uyancipha kakhulu kumanje omkhulu, futhi lapho ukuminyana kwamanje kwanda, umphumela wokukhanya wehliswa ngokushesha. Esikhathini samanje esingu-350 mA, ukusebenza kahle okukhanyayo kungu-108 Lm/W, futhi ngaphansi kwesimo se-1 A, ukusebenza kahle okukhanyayo kwehla ku-66 Lm/W.
Kumaphosfide eQembu III, ukukhipha ukukhanya ebhandeni eliluhlaza kuba isithiyo esiyisisekelo ohlelweni lwezinto ezibonakalayo. Ukushintsha ukwakheka kwe-AlInGaP kuyenza ikhanye ngokuluhlaza esikhundleni sokubomvu, okuwolintshi noma okuphuzi—okubangela ukuvalelwa kwenkampani yenethiwekhi okunganele ngenxa yegebe eliphansi lamandla ohlelo lwezinto ezibonakalayo, okuqeda ukuhlanganisa kabusha okusebenzayo kwemisebe.
Ngokuphambene, ama-nitrides eQembu III anzima kakhulu ukuwafinyelela, kodwa ubunzima abunakunqotshwa. Ngalolu hlelo, izici ezimbili ezenza ukusebenza kahle kwehle ngenxa yokwengezwa kokukhanya ebhandeni eliluhlaza yilezi: ukusebenza kahle kwe-quantum yangaphandle kanye nokuwohloka kokusebenza kahle kukagesi. Ukuncipha kokusebenza kahle kwe-quantum yangaphandle kubangelwa ukuthi i-LED eluhlaza inevoltheji ephezulu eya phambili ye-GaN, ebangela ukuthi izinga lokuguqulwa kwamandla lehle. Ububi besibili ukuthi i-LED eluhlaza iyehla njengoba ukuminyana kwamanje komjovo kukhuphuka, okubanjelwe umphumela we-droop. Umphumela we-Droop uvela futhi kuma-LED aluhlaza okwesibhakabhaka, kodwa kubaluleke nakakhulu kuma-LED aluhlaza, okuholela ekusetshenzisweni kwemisinga ephansi. Kodwa-ke, kunezizathu eziningi zembangela yomphumela we-droop, hhayi kuphela i-Auger compound, kodwa futhi nokungahambi kahle, ukuchichima kwesithwali noma ukuvuza kwe-electron. Lesi sakamuva sithuthukiswa yinkambu kagesi yangaphakathi ene-voltage ephezulu.
Ngakho-ke, indlela yokuthuthukisa ukusebenza okukhanyayo kwama-LED aluhlaza: ngakolunye uhlangothi, indlela yokunciphisa umphumela we-Droop ngaphansi kwezimo ezikhona ze-epitaxial ukuze kuthuthukiswe ukusebenza kahle kokukhanya; isici sesibili, ukuguqulwa kwe-photoluminescence kwe-LED eluhlaza okwesibhakabhaka kanye ne-phosphor eluhlaza ikhipha ukukhanya okuluhlaza, Indlela ingathola ukukhanya okuluhlaza okusebenza kahle kakhulu, futhi ngokwethiyori ingafinyelela phezulu kunomphumela wokukhanya omhlophe wamanje, ongowokukhanya okuluhlaza okungazenzeki, futhi ukuhlanzeka kombala okubangelwa ukunwetshwa kwe-spectral kuncipha, okungathandeki ukuboniswa, kodwa kokujwayelekile Ayikho inkinga ngokukhanyisa. Umphumela wokukhanya okuluhlaza otholwe yile ndlela unethuba elingaphezu kuka-340 Lm/W, kodwa namanje awudluli ku-340 Lm/W ngemva kokuhlanganisa ukukhanya okumhlophe. Okwesithathu, qhubeka nokucwaninga futhi uthole impahla yayo ye-epitaxial, kuphela Ngale ndlela, kunethemba lokuthi ngokuthola ukukhanya okuluhlaza ngaphezu kuka-340 Lm/w, ukukhanya okumhlophe okuhlanganiswe nombala obomvu, oluhlaza okwesibhakabhaka nohlaza okwesibhakabhaka ama-LED amathathu ayinhloko angase abe. iphakeme kunomkhawulo osebenza kahle wokukhanya wohlobo lwe-chip eluhlaza okwesibhakabhaka i-LED 340 Lm/W.
3.UV LED chip + umbala oyinhloko phosphor ukukhanya ezintathu
Iphutha eliyinhloko lama-LED amabili amhlophe angenhla ukusatshalaliswa kwendawo engalingani kokukhanya ne-chromaticity. Ukukhanya kwe-Ultraviolet akubonakali ngeso lomuntu. Ngakho-ke, ngemva kokukhishwa kokukhanya kwe-ultraviolet ku-chip, kudonswa i-phosphor yombala emithathu eyinhloko ye-encapsulating layer, futhi i-photoluminescence ye-phosphor iguqulwa ibe ukukhanya okumhlophe, okube sekukhishelwa emkhathini. Lena inzuzo yayo enkulu, njengezibani ze-fluorescent zendabuko, ayinakho ukungalingani kombala wendawo. Nokho, umphumela wokukhanya kwethiyori wohlobo lwe-ultraviolet chip emhlophe awukwazi ukuba phezulu kunevelu yethiyori yohlobo lwe-chip eluhlaza okwesibhakabhaka ukukhanya okumhlophe, futhi mancane amathuba okuba ube phezulu kunevelu yethiyori yohlobo lokukhanya okumhlophe kwe-RGB. Kodwa-ke, kungokwakhiwa kwamaphosphor asebenza kahle kakhulu e-trichromatic afanele ukuvuswa kokukhanya kwe-ultraviolet lapho kungenzeka khona ukuthola ama-LED amhlophe ohlobo lwe-ultraviolet aseduze noma asebenza kahle kakhulu kunama-LED amabili amanje amhlophe. Ukusondela kuma-LED e-ultraviolet ekhanyayo, kungenzeka Uma ama-LED amhlophe amagagasi aphakathi nendawo kanye namagagasi amafushane ama-LED amhlophe, kungenzeki nakakhulu.