Izinhlobo ze-LED ezimhlophe: Imizila yobuchwepheshe eyinhloko ye-LED emhlophe yokukhanyisa yile: ① I-LED eluhlaza okwesibhakabhaka + uhlobo lwe-phosphor;②Uhlobo lwe-RGB LED;③ I-Ultraviolet LED + uhlobo lwe-phosphor.

1. Ukukhanya okuluhlaza okwesibhakabhaka - I-chip ye-LED + uhlobo lwe-phosphor oluphuzi-luhlaza okuhlanganisa okuphuma ku-phosphor okunemibala eminingi nezinye izinhlobo.

Isendlalelo se-phosphor esiphuzi-luhlaza simunca ingxenye yokukhanya okuluhlaza okwesibhakabhaka ku-chip ye-LED ukuze kukhiqizwe i-photoluminescence.Enye ingxenye yokukhanya okuluhlaza okwesibhakabhaka okuvela ku-chip ye-LED idluliselwa ngongqimba lwe-phosphor futhi ihlanganiswe nokukhanya okuphuzi okuluhlaza okukhishwa i-phosphor ezindaweni ezihlukahlukene esikhaleni.Amalambu abomvu, aluhlaza kanye naluhlaza axutshwa ukwenza ukukhanya okumhlophe;Kule ndlela, inani eliphakeme kakhulu le-theoretical lokuguqulwa kwe-phosphor photoluminescence, enye ye-quantum efficiencies yangaphandle, ngeke idlule i-75%;futhi izinga eliphezulu lokukhipha ukukhanya ku-chip lingafinyelela cishe ku-70%.Ngakho-ke, ngokwethiyori, ukukhanya okumhlophe kohlobo oluluhlaza okwesibhakabhaka Ubukhulu be-LED obukhanyayo obusebenza kahle ngeke budlule ku-340 Lm/W.Eminyakeni embalwa edlule, i-CREE ifinyelele ku-303Lm/W.Uma imiphumela yokuhlolwa inembile, kufanelekile ukubungazwa.

2. Inhlanganisela yemibala emithathu eyinhloko ebomvu, eluhlaza okwesibhakabhaka nohlaza okwesibhakabhakaIzinhlobo ze-RGB LEDhlanganisaI-RGBW- Izinhlobo ze-LED, njll.

I-R-LED (bomvu) + G-LED (eluhlaza okotshani) + B-LED (blue) ama-diode amathathu akhipha ukukhanya ahlanganiswe ndawonye, ​​futhi imibala emithathu eyinhloko yokukhanya okubomvu, okuluhlaza okotshani nokuluhlaza okwesibhakabhaka okukhishwayo ixubene ngokuqondile esikhaleni ukuze ibe mhlophe. ukukhanya.Ukuze ukhiqize ukukhanya okumhlophe okusebenza kahle kakhulu ngale ndlela, okokuqala, ama-LED emibala ehlukahlukene, ikakhulukazi ama-LED aluhlaza, kumele abe yimithombo yokukhanya ephumelelayo.Lokhu kungabonakala eqinisweni lokuthi ukukhanya okuluhlaza kubala cishe u-69% "wokukhanya okumhlophe kwe-isoenergy".Njengamanje, ukusebenza kahle okukhanyayo kwama-LED aluhlaza okwesibhakabhaka nabomvu kuye kwaba phezulu kakhulu, ukusebenza kahle kwe-quantum kwangaphakathi kwedlula u-90% no-95% ngokulandelana, kodwa ukusebenza kahle kwe-quantum yangaphakathi kwama-LED aluhlaza kusalele emuva kakhulu.Lesi simo sokukhanya okuphansi kokukhanya okuluhlaza kwama-LED asekelwe ku-GaN sibizwa ngokuthi “igebe lokukhanya okuluhlaza.”Isizathu esiyinhloko ukuthi ama-LED aluhlaza akakazitholi izinto zawo ze-epitaxial.Izinto ezikhona zochungechunge lwe-phosphorus arsenic nitride zisebenza kahle kakhulu kububanzi obuphuzi nokuluhlaza okotshani.Kodwa-ke, ukusebenzisa izinto ze-epitaxial ezibomvu noma eziluhlaza okwesibhakabhaka ukwenza ama-LED aluhlaza kuzoba Ngaphansi kwezimo eziphansi zokuminyana zamanje, ngoba akukho ukulahleka kokuguqulwa kwe-phosphor, i-LED eluhlaza inokusebenza kahle okukhanyayo kunokukhanya okuluhlaza okwesibhakabhaka + kwe-phosphor.Kubikwa ukuthi ukusebenza kahle kwayo okukhanyayo kufinyelela ku-291Lm/W ngaphansi kwesimo samanje se-1mA.Nokho, ukusebenza kahle okukhanyayo kokukhanya okuluhlaza okubangelwa umphumela we-Droop kwehla kakhulu kumaza amakhulu.Lapho ukuminyana kwamanje kukhula, ukusebenza kahle okukhanyayo kwehla ngokushesha.Ku-350mA yamanje, ukusebenza kahle okukhanyayo ngu-108Lm/W.Ngaphansi kwezimo ze-1A, ukusebenza kahle okukhanyayo kuyehla.ku-66Lm/W.

Kumaphosfide eQembu III, ukukhipha ukukhanya ebhandeni eliluhlaza kube isithiyo esibalulekile kumasistimu wezinto ezibonakalayo.Ukushintsha ukwakheka kwe-AlInGaP ukuze ikhiphe okuluhlaza kunokubomvu, okuwolintshi noma okuphuzi kuphumela ekuvalelweni okwanele kwenkampani yenethiwekhi ngenxa yegebe eliphansi lamandla lesistimu yezinto ezibonakalayo, elivimbela ukuhlanganisa kabusha kwemisebe ephumelelayo.

Ngokuphambene, kunzima kakhulu ku-III-nitrides ukufeza ukusebenza kahle okuphezulu, kodwa ubunzima abunakunqotshwa.Ukusebenzisa lolu hlelo, ukwelula ukukhanya ebhandeni lokukhanya okuluhlaza, izici ezimbili ezizobangela ukwehla kokusebenza kahle yilezi: ukwehla kokusebenza kahle kwe-quantum yangaphandle kanye nokusebenza kahle kukagesi.Ukuncipha kokusebenza kahle kwe-quantum yangaphandle kuvela eqinisweni lokuthi nakuba igebe lebhande eliluhlaza liphansi, ama-LED aluhlaza asebenzisa i-voltage eya phambili ephezulu ye-GaN, okubangela ukuba izinga lokuguqulwa kwamandla lehle.Ububi besibili ukuthi i-LED eluhlaza iyehla njengoba umthamo wamanje womjovo ukhuphuka futhi ubhajwe umphumela wokuwa.Umphumela we-Droop uyenzeka futhi kuma-LED aluhlaza, kodwa umthelela wawo mkhulu kuma-LED aluhlaza, okuholela ekunciphiseni ukusebenza okujwayelekile kwamanje okusebenzayo.Kodwa-ke, kunemibono eminingi mayelana nezimbangela zomphumela we-droop, hhayi nje i-Auger recombination - ihlanganisa ukuchithwa, ukuchichima kwenkampani yenethiwekhi noma ukuvuza kwe-electron.Lesi sakamuva sithuthukiswa inkambu kagesi yangaphakathi ene-voltage ephezulu.

Ngakho-ke, indlela yokuthuthukisa ukusebenza kahle kokukhanya kwama-LED aluhlaza: ngakolunye uhlangothi, funda indlela yokunciphisa umphumela we-Droop ngaphansi kwezimo zezinto ezikhona ze-epitaxial ukuthuthukisa ukusebenza kahle kokukhanya;ngakolunye uhlangothi, sebenzisa ukuguqulwa kwe-photoluminescence kwama-LED aluhlaza kanye nama-phosphor aluhlaza ukuze ukhiphe ukukhanya okuluhlaza.Le ndlela ingathola ukukhanya okuluhlaza okusebenza kahle kakhulu, okuthi ngokwethiyori kufinyelele ukukhanya okuphezulu okusebenzayo kunokukhanya okumhlophe kwamanje.Iwukukhanya okuluhlaza okungazenzeki, futhi ukuncipha kokuhlanzeka kombala okubangelwa ukunwetshwa kwayo okubonakalayo akulungile ekubonisweni, kodwa akufanelekile kubantu abavamile.Ayikho inkinga yokukhanyisa.Ukusebenza kokukhanya okuluhlaza okutholwe yile ndlela kunethuba lokuba kukhulu kuno-340 Lm/W, kodwa ngeke kudlule ku-340 Lm/W ngemva kokuhlanganisa nokukhanya okumhlophe.Okwesithathu, qhubeka nokucwaninga futhi uthole izinto zakho ze-epitaxial.Kungale ndlela kuphela, kukhona inhlansi yethemba.Ngokuthola ukukhanya okuluhlaza okungaphezu kuka-340 Lm/w, ukukhanya okumhlophe okuhlanganiswe ama-LED amathathu ayinhloko anombala obomvu, oluhlaza okotshani noluhlaza okwesibhakabhaka kungaba ngaphezu komkhawulo wokusebenza kahle okhanyayo ongu-340 Lm/w wama-LED amhlophe wohlobo lwe-chip. .W.

3. I-Ultraviolet LEDi-chip + i-phosphor yombala emithathu eyinhloko ikhipha ukukhanya.

Isici esiyinhloko semvelo sezinhlobo ezimbili ezingenhla zama-LED amhlophe ukusatshalaliswa kwendawo engalingani kokukhanya ne-chromaticity.Ukukhanya kwe-Ultraviolet akukwazi ukubonwa ngeso lomuntu.Ngakho-ke, ngemva kokuba ukukhanya kwe-ultraviolet kuphuma ku-chip, kudonswa i-phosphor yombala emithathu eyinhloko ongqimbeni lokupakisha, futhi iguqulwa ibe ukukhanya okumhlophe yi-photoluminescence ye-phosphors, bese ikhishwa emkhathini.Lena inzuzo yayo enkulu, njengezibani ze-fluorescent zendabuko, ayinakho ukungalingani kombala wendawo.Nokho, ukusebenza kahle kokukhanya kwe-ultraviolet chip white LED akukwazi ukuba phezulu kunenani lethiyori lokukhanya okumhlophe kwe-blue chip, ingasaphathwa eyevelu yetiyori yokukhanya okumhlophe kwe-RGB.Kodwa-ke, kuphela ngokuthuthukiswa kwamaphosphor emibala emithathu eyinhloko esebenza kahle kakhulu elungele ukuvuthwa kwe-ultraviolet singakwazi ukuthola ama-LED amhlophe e-ultraviolet aseduze noma asebenza kahle kakhulu kunalawa ma-LED amhlophe angenhla kulesi sigaba.Uma kusondele ama-LED e-ultraviolet aluhlaza, maningi amathuba okuba maningi.Uma inkulu, ama-LED amhlophe e-UV amaphakathi namagagasi amafushane awakwazi ukwenzeka.