1. I-chip ye-LED eluhlaza okwesibhakabhaka+i-phosphor eluhlaza okuphuzi, okuhlanganisa nokuphuma kokuphuma kwe-phosphor kwe-polychrome

Ungqimba oluphuzi lwephosphor lumunca ukukhanya okuluhlaza kwabanyeAma-chips e-LEDukukhiqiza i-photoluminescence, futhi ukukhanya okuluhlaza okwesibhakabhaka okuvela kuma-chips e-LED kuphuma kungqimba lwe-phosphor futhi kuhlangane nokukhanya okuluhlaza okuphuzi okukhishwa i-phosphor ezindaweni ezihlukahlukene emkhathini, futhi ukukhanya okuluhlaza okwesibhakabhaka okubomvu kuxutshwe ukuze kwakhe ukukhanya okumhlophe;Ngale ndlela, inani eliphakeme lethiyori ye-photoluminescence yokuguqulwa kwe-phosphor, enye ye-quantum yangaphandle, ngeke idlule i-75%;Izinga eliphakeme kakhulu lokukhipha ukukhanya ku-chip lingafinyelela cishe ku-70%.Ngakho-ke, ngokombono, ukusebenza kahle okuphezulu kokukhanya kwe-LED emhlophe ekhanyayo ngeke kudlule u-340 Lm/W, futhi i-CREE izofinyelela ku-303 Lm/W eminyakeni embalwa edlule.Uma imiphumela yokuhlolwa inembile, kufanelekile ukubungazwa.

2. Okubomvu okuluhlaza okwesibhakabhaka okuhlaza okwesibhakabhaka okuthathu okuyinhloko okuhlanganisa uhlobo lwe-RGB LED, okuhlanganisa uhlobo lwe-RGB W LED, njll

Abathathuokukhipha ukukhanyaama-diode, i-R-LED (obomvu)+G-LED (okuluhlaza)+B-LED (okuluhlaza okwesibhakabhaka), ahlanganiswe ukuze akhe ukukhanya okumhlophe ngokuxuba ngokuqondile ukukhanya okubomvu, okuluhlaza okwesibhakabhaka okuphuma emkhathini.Ukuze ukhiqize ukukhanya okumhlophe okukhanyayo okuphezulu ngale ndlela, okokuqala, wonke ama-LED anemibala, ikakhulukazi ama-LED aluhlaza, kufanele abe imithombo yokukhanya esebenza kahle, ehlanganisa cishe u-69% "wokukhanya okumhlophe okulinganayo kwamandla".Njengamanje, ukukhanya kwe-LED eluhlaza okwesibhakabhaka kanye ne-LED ebomvu kuphezulu kakhulu, nokusebenza kahle kwe-quantum yangaphakathi kudlula u-90% no-95% ngokulandelana, kodwa ukusebenza kahle kwe-quantum yangaphakathi ye-LED eluhlaza kusemuva kakhulu.Lesi simo sokusebenza kahle kokukhanya okuluhlaza okuphansi kwe-GaN based LED ibizwa ngokuthi “igebe lokukhanya okuluhlaza”.Isizathu esiyinhloko ukuthi i-LED eluhlaza ayikatholi impahla yayo ye-epitaxial.Ukusebenza kahle kwezinto ezikhona zochungechunge lwe-phosphorus arsenic nitride kuphansi kakhulu kububanzi obuluhlaza obuphuzi be-chromatographic.Kodwa-ke, i-LED eluhlaza yenziwe ngokukhanya okubomvu noma izinto eziluhlaza okwesibhakabhaka ze-epitaxial.Ngaphansi kwesimo sokuminyana okuphansi kwamanje, ngenxa yokuthi akukho ukuguqulwa kokuguqulwa kwe-phosphor, i-LED eluhlaza inokukhanya okuphezulu okukhanyayo kunokukhanya okuluhlaza okwesibhakabhaka+ nokukhanya okuluhlaza kwe-phosphor.Kubikwa ukuthi ukusebenza kahle kwayo okukhanyayo kufinyelela ku-291Lm/W ngaphansi kwamanje kwe-1mA.Kodwa-ke, ngaphansi kwamandla aphezulu, ukusebenza kahle okukhanyayo kokukhanya okuluhlaza okubangelwa umphumela we-Droop kuncipha kakhulu.Lapho ukuminyana kwamanje kukhula, ukusebenza kahle okukhanyayo kuncipha ngokushesha.Ngaphansi kwe-350mA yamanje, ukusebenza kahle okukhanyayo kungu-108Lm/W, futhi ngaphansi kwesimo esingu-1A, ukusebenza kahle okukhanyayo kuyehla kuye ku-66Lm/W.

Kumaphosfide eqembu III, ukukhipha ukukhanya ebhandeni eliluhlaza kube isithiyo esiyisisekelo sesistimu yezinto ezibonakalayo.Ukushintsha ukwakheka kwe-AlInGaP ukuze ikhiphe ukukhanya okuluhlaza esikhundleni sokubomvu, okuwolintshi noma okuphuzi - okubangela umkhawulo ongenele wenkampani yenethiwekhi kungenxa yegebe eliphansi lamandla ohlelo lwezinto ezibonakalayo, okuvimbela ukuhlanganisa kabusha kwemisebe ngempumelelo.

Ngokuphambene, kunzima kakhulu ku-Group III nitrides ukufeza ukusebenza kahle okuphezulu, kodwa ubunzima abunakunqotshwa.Uma ukukhanya kunwetshwa ebhendini yokukhanya okuluhlaza nalesi simiso, izici ezimbili ezizonciphisa ukusebenza kahle ukusebenza kahle kwe-quantum yangaphandle kanye nokusebenza kahle kukagesi.Ukuncipha kokusebenza kahle kwe-quantum yangaphandle kuvela eqinisweni lokuthi nakuba igebe lebhande eliluhlaza liphansi, i-LED eluhlaza isebenzisa i-voltage ephezulu eya phambili ye-GaN, enciphisa izinga lokuguqulwa kwamandla.Ububi besibili yilokho okuluhlazaI-LED iyanciphangokwanda komthamo wamanje womjovo futhi ubanjwe umphumela we-droop.Umphumela we-droop uvela futhi ku-LED eluhlaza okwesibhakabhaka, kodwa ubucayi kakhulu ku-LED eluhlaza, okuholela ekusebenzeni okuphansi kokusebenza kwamanje okujwayelekile.Kodwa-ke, kunezizathu eziningi zomphumela we-droop, hhayi kuphela i-Auger recombination, kodwa futhi nokuhlukaniswa, ukuchichima kwenkampani yenethiwekhi noma ukuvuza kwe-elekthronikhi.Lesi sakamuva sithuthukiswa yinkambu kagesi yangaphakathi ene-voltage ephezulu.

Ngakho-ke, izindlela zokuthuthukisa ukusebenza kahle okukhanyayo kwe-LED eluhlaza: ngakolunye uhlangothi, funda indlela yokunciphisa umphumela we-Droop ukuthuthukisa ukusebenza kahle okukhanyayo ngaphansi kwezimo zezinto ezikhona ze-epitaxial;Ngakolunye uhlangothi, i-LED eluhlaza okwesibhakabhaka kanye ne-phosphor eluhlaza isetshenziselwa ukuguqulwa kwe-photoluminescence ukuze kukhishwe ukukhanya okuluhlaza.Le ndlela ingathola ukukhanya okuluhlaza ngokusebenza kahle okuphezulu kokukhanya, lokho ngokwethiyori kungafinyelela ukusebenza kahle okuphezulu kokukhanya kunokukhanya okumhlophe kwamanje.Ingekakukhanya okuluhlaza okungazenzeki.Ukwehla kokuhlanzeka kombala okubangelwa ukunwetshwa kwe-spectral akukulungele ukuboniswa, kodwa akuyona inkinga ngokukhanyisa okuvamile.Kungenzeka ukuthola ukusebenza kahle okukhanyayo okuluhlaza okungaphezu kuka-340 Lm/W, Nokho, ukukhanya okumhlophe okuhlanganisiwe ngeke kudlule ku-340 Lm/W;Okwesithathu, qhubeka nokucwaninga futhi uthole izinto zakho ze-epitaxial.Kungale ndlela kuphela lapho kungaba khona inhlansi yethemba yokuthi ngemva kokuthola ukukhanya okuluhlaza okwengeziwe kuno-340 Lm/w, ukukhanya okumhlophe kuhlanganiswe ama-LED anemibala emithathu eyinhloko ebomvu, eluhlaza okwesibhakabhaka kungase kube phezulu kunomkhawulo wokukhanya okukhanyayo kwe-chip eluhlaza okwesibhakabhaka. I-LED emhlophe engu-340 Lm/W.

3. I-Ultraviolet LED chip+tri color phosphor

Isici esiyinhloko esingokwemvelo sezinhlobo ezimbili ezingenhla ze-LED emhlophe ukuthi ukusatshalaliswa kwendawo kokukhanya ne-chroma akulingani.Ukukhanya kwe-UV akubonakali ngeso lomuntu.Ngakho-ke, ukukhanya kwe-UV okukhishwa ku-chip kudonswa umbala we-phosphor we-tri color of the packaging layer, bese kuguqulwa kusuka ku-photoluminescence ye-phosphor kuya ekukhanyeni okumhlophe futhi kukhishwe emkhathini.Lena inzuzo yayo enkulu, njengesibani esivamile se-fluorescent, ayinawo umbala wesikhala ongalingani.Kodwa-ke, ukusebenza kahle okungokomfanekiso kokukhanya kwe-ultraviolet chip yohlobo lwe-LED emhlophe akukwazi ukuba phezulu kunevelu yethiyori yohlobo lwe-chip eluhlaza okwesibhakabhaka ukukhanya okumhlophe, ingasaphathwa yenani letiyori lohlobo lokukhanya okumhlophe kwe-RGB.Kodwa-ke, ngokwakha ama-phosphor e-tricolor asebenza kahle afanele ukuvuswa kokukhanya kwe-UV lapho kungakwazi khona ukuthola i-ultraviolet emhlophe ye-LED enokukhanya okufanayo noma okuphakeme nakakhulu kunama-LED amabili amhlophe okukhulunywe ngawo ngenhla kulesi sigaba.Uma i-ultraviolet LED isondela ekukhanyeni okuluhlaza okwesibhakabhaka, maningi amathuba okuba isondele, futhi i-LED emhlophe enamagagasi aphakathi nendawo nemigqa ye-ultraviolet yamagagasi amafushane ngeke kwenzeke.