1. I-blue LED chip + iphosphor eluhlaza ephuzi, kuquka i-polychrome phosphor derivative

Umaleko oluhlaza wephosphor ufunxa ukukhanya okuluhlaza kwezinyeIitshiphusi ze-LEDukuvelisa i-photoluminescence, kunye nokukhanya okuluhlaza okwesibhakabhaka okuvela kwii-chips ze-LED kukhupha ngaphandle kwe-phosphor layer kwaye idibanisa nokukhanya okuluhlaza okutyheli okukhutshwa yi-phosphor kwiindawo ezahlukeneyo kwindawo, kunye nokukhanya okuluhlaza okubomvu kuxutywe ukwenza ukukhanya okumhlophe; Ngale ndlela, ixabiso eliphezulu lethiyori ye-photoluminescence yokuguqulwa kwe-phosphor, enye ye-quantum yangaphandle, ayiyi kudlula i-75%; Elona nqanaba liphezulu lokutsalwa kokukhanya kwi-chip lingafikelela kuphela malunga nama-70%. Ke ngoko, ngokwethiyori, ukukhanya okuphezulu kokukhanya okuluhlaza kwe-LED okumhlophe akuyi kudlula i-340 Lm / W, kwaye i-CREE iya kufikelela kwi-303 Lm / W kwiminyaka embalwa edlulileyo. Ukuba iziphumo zovavanyo zichanekile, kuyafaneleka ukubhiyozela.

2. Umbala obomvu oluhlaza okwesibhakabhaka ezintathu eziphambili zombala we-RGB uhlobo lwe-LED, kubandakanywa uhlobo lwe-RGB W LED, njl

Abathathuukukhanya okukhuphayoiidiode, i-R-LED (ebomvu) + G-LED (eluhlaza) + B-LED (blue), zidityanisiwe ukuze zenze ukukhanya okumhlophe ngokuxuba ngokuthe ngqo ukukhanya okubomvu, okuluhlaza kunye noluhlaza okwesibhakabhaka oluphuma esithubeni. Ukuze kuveliswe ukukhanya okuphezulu okukhanyayo okukhanyayo ngale ndlela, okokuqala, zonke ii-LED zemibala, ngakumbi ii-LED eziluhlaza, kufuneka zibe yimithombo yokukhanya esebenzayo, eyenza malunga ne-69% "yokukhanya okumhlophe okulinganayo kwamandla". Okwangoku, ukukhanya okukhanyayo kwe-LED eluhlaza kunye ne-LED ebomvu kuphezulu kakhulu, kunye nokusebenza kwe-quantum yangaphakathi kudlula i-90% kunye ne-95% ngokulandelanayo, kodwa ukusebenza kwe-quantum yangaphakathi ye-LED eluhlaza kusemva kakhulu. Le nto yokukhanya okuphantsi kokukhanya okuluhlaza kwe-GaN esekwe kwi-LED ibizwa ngokuba "yi-gap yokukhanya okuluhlaza". Isizathu esona sizathu kukuba i-LED eluhlaza ayikafumani izinto zayo ze-epitaxial. Ukusebenza kakuhle kwezinto ezikhoyo ze-phosphorus arsenic nitride series ziphantsi kakhulu kuluhlu lwechromatographic emthubi. Nangona kunjalo, i-LED eluhlaza yenziwe ngokukhanya okubomvu okanye i-blue light epitaxial materials. Ngaphantsi kwemeko yoxinano oluphantsi lwangoku, ngenxa yokuba akukho lahleko yokuguqulwa kwephosphor, i-LED eluhlaza inokukhanya okuphezulu okuphezulu kunokukhanya okuluhlaza + kwephosphor eluhlaza. Kuxelwe ukuba ukusebenza kwayo okukhanyayo kufikelela kwi-291Lm / W phantsi kwe-1mA yangoku. Nangona kunjalo, phantsi komgangatho ophezulu wangoku, ukusebenza kakuhle kokukhanya okuluhlaza okubangelwa yi-Droop effect kuncipha kakhulu. Xa ukuxinana kwangoku kunyuka, ukukhanya okukhanyayo kuncipha ngokukhawuleza. Ngaphantsi kwe-350mA yangoku, ukusebenza kakuhle okukhanyayo yi-108Lm/W, kwaye phantsi kwemeko ye-1A, ukusebenza kakuhle okukhanyayo kuncipha ukuya kwi-66Lm/W.

Kwiqela le-III phosphides, ukukhutshwa kokukhanya kwibhanti eluhlaza kuye kwaba ngumqobo osisiseko wenkqubo yezinto. Ukutshintsha ukubunjwa kwe-AlInGaP ukwenzela ukuba ikhuphe ukukhanya okuluhlaza endaweni yobomvu, i-orenji okanye i-yellow-ebangela ukulinganiselwa okungonelanga komthwali kubangelwa i-gap yamandla ephantsi ngokwentelekiso yenkqubo yezinto eziphathekayo, ethintela ukuhlanganiswa okusebenzayo kwemitha.

Ngokwahlukileyo, kunzima kakhulu kwi-nitrides yeQela le-III ukuphumeza ukusebenza kakuhle, kodwa ubunzima abunakugqithiswa. Xa ukukhanya kwandiswe kwibhanti yokukhanya okuluhlaza kunye nale nkqubo, izinto ezimbini eziza kunciphisa ukusebenza kakuhle kubuninzi be-quantum yangaphandle kunye nokusebenza kombane. Ukuncipha kokusebenza komyinge wangaphandle kuvela kwinto yokuba nangona i-gap ye-green band isezantsi, i-LED eluhlaza isebenzisa i-voltage ephezulu ye-GaN, enciphisa izinga lokuguqulwa kwamandla. Ububi besibini kukuba luhlazaI-LED iyanciphangokunyuka kwe-injection yangoku yoxinaniso kwaye ibanjwe yi-droop effect. Impembelelo yeDroop ikwavela kwi-LED eluhlaza okwesibhakabhaka, kodwa inzulu ngakumbi kwi-LED eluhlaza, ekhokelela ekusebenzeni okuphantsi kokusebenza okuqhelekileyo kwangoku. Nangona kunjalo, zininzi izizathu ze-droop effect, kungekuphela nje i-Auger recombination, kodwa kunye nokuchithwa, ukuphuphuma kwe-carrier okanye ukuvuza kwe-elektroniki. Le yokugqibela iphuculwe ngamandla aphezulu ombane angaphakathi kwindawo yombane.

Ngoko ke, iindlela zokuphucula ukukhanya okukhanyayo kwe-LED eluhlaza: kwelinye icala, funda indlela yokunciphisa i-Droop effect ukuphucula ukukhanya okukhanyayo phantsi kweemeko zezinto ezikhoyo ze-epitaxial; Kwelinye icala, i-LED eluhlaza okwesibhakabhaka kunye ne-phosphor eluhlaza isetyenziselwa ukuguqulwa kwe-photoluminescence ukukhupha ukukhanya okuluhlaza. Le ndlela inokufumana ukukhanya okuluhlaza kunye nokusebenza okukhanyayo okuphezulu, okunokuthi ngokwethiyori kufikelele ukusebenza okuphezulu kokukhanya kunokukhanya okumhlophe kwangoku. Yeyokukhanya okuluhlaza okungazenzekeliyo. Ukuhla kobunyulu bombala okubangelwa kukwandiswa kwayo okubonakalayo akulunganga ukuboniswa, kodwa akukho ngxaki kukukhanya okuqhelekileyo. Kunokwenzeka ukuba ufumane ukusebenza kakuhle okukhanyayo okuluhlaza ngaphezu kwe-340 Lm / W, Nangona kunjalo, ukukhanya okumhlophe okudibeneyo akuyi kudlula i-340 Lm / W; Okwesithathu, qhubeka uphanda kwaye ufumane izixhobo zakho ze-epitaxial. Kungale ndlela kuphela apho kunokuthi kubekho intlantsi yethemba lokuba emva kokufumana ukukhanya okuluhlaza okungaphezulu kwe-340 Lm/w, ukukhanya okumhlophe kudityaniswe nombala obomvu, oluhlaza kunye noblowu wemibala emithathu ephambili ye-LED inokuba phezulu kunomda wokukhanya wokukhanya wechip eluhlaza. i-LED emhlophe ye-340 Lm/W.

3. I-Ultraviolet LED chip + tri color phosphor

Esona siphene siphambili kwezi ntlobo zimbini zingasentla ze-LED emhlophe kukuba usasazo lwendawo yokukhanya kunye nechroma azilingani. Ukukhanya kwe-UV akubonakali kwiliso lomntu. Ke ngoko, ukukhanya kwe-UV okuphuma kwi-chip kutsalwa ngumbala we-phosphor we-package layer, emva koko kuguqulwe ukusuka kwi-photoluminescence ye-phosphor ukuya ekukhanyeni okumhlophe kwaye kukhutshwe esikhaleni. Le yeyona nzuzo inkulu, kanye njengesibane se-fluorescent esiqhelekileyo, ayinawo umbala ongalinganiyo wendawo. Nangona kunjalo, ukusebenza kakuhle kwethiyori ye-ultraviolet chip emhlophe ye-LED ayinakuba phezulu kunexabiso lethiyori yohlobo lwe-blue chip ukukhanya okumhlophe, singasathethi ke ngexabiso lethiyori yohlobo lokukhanya okumhlophe kwe-RGB. Nangona kunjalo, kuphela ngokuphuhlisa i-phosphors esebenzayo ye-tricolor efanele ukuvuswa kokukhanya kwe-UV kunokwenzeka ukuba ufumane i-ultraviolet emhlophe ye-LED enokukhanya okufanayo okanye okungaphezulu kokukhanya kwe-LED ezimbini ezimhlophe ezikhankanywe ngasentla kweli nqanaba. Ukusondela kwe-ultraviolet i-LED kukukhanya okuluhlaza okwesibhakabhaka, kokukhona kuya kuba njalo, kwaye i-LED emhlophe enamaza aphakathi kunye nemigca emifutshane ye-ultraviolet iya kuba yinto engenakwenzeka.