1. I-chip 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 oluhlazaI-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 kokukhanya 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.