Iintlobo ze-LED ezimhlophe: Ezona ndlela zobugcisa ze-LED ezimhlophe zokukhanyisa zezi: ① I-LED eluhlaza okwesibhakabhaka + uhlobo lwe-phosphor;②Uhlobo lwe-RGB LED;③ I-Ultraviolet LED + uhlobo lwephosphor.

1. Ukukhanya okuluhlaza okwesibhakabhaka - i-chip ye-LED + uhlobo lwe-phosphor oluphuzi-luhlaza olubandakanya i-multi-color phosphor derivatives kunye nezinye iintlobo.

Umaleko we-phosphor otyheli-luhlaza ufunxa inxalenye yokukhanya okuluhlaza okwesibhakabhaka kwi-chip ye-LED ukuvelisa i-photoluminescence.Elinye icandelo lokukhanya okuluhlaza okwesibhakabhaka ukusuka kwi-chip ye-LED isasazwa ngomgangatho we-phosphor kwaye idibanisa nokukhanya okutyheli-okuluhlaza okukhutshwa yiphosphor kwiindawo ezahlukeneyo kwindawo.Izibane ezibomvu, eziluhlaza neziluhlaza zixutywe ukwenza ukukhanya okumhlophe;Kule ndlela, ixabiso eliphezulu lethiyori ye-phosphor photoluminescence yokuguqulwa kwe-phosphor photoluminescence, enye ye-quantum efficiencies yangaphandle, ayiyi kudlula i-75%;kunye neqondo eliphezulu lokutsalwa kokukhanya kwi-chip lingafikelela kuphela malunga ne-70%.Ke ngoko, ngokwethiyori, uhlobo oluluhlaza okwesibhakabhaka ukukhanya okumhlophe Ubuninzi be-LED obukhanyayo obusebenzayo abuyi kudlula i-340 Lm/W.Kwiminyaka embalwa edlulileyo, i-CREE ifikelele kwi-303Lm/W.Ukuba iziphumo zovavanyo zichanekile, kuyafaneleka ukubhiyozela.

2. Obomvu, oluhlaza kunye noluhlaza okwesibhakabhaka indibaniselwano yemibala emithathu ephambiliIintlobo ze-RGB ze-LEDziqukaRGBW- Iintlobo ze-LED, njl.

I-R-LED (bomvu) + G-LED (eluhlaza) + B-LED (bhlowu) iidiode ezintathu ezikhupha ukukhanya zidityaniswe kunye, kwaye imibala emithathu yokuqala yokukhanya okubomvu, okuluhlaza kunye noluhlaza okwesibhakabhaka okhutshiweyo ixutywe ngqo esithubeni ukwenza mhlophe. ukukhanya.Ukuze kuveliswe ukukhanya okumhlophe okuphezulu ngale ndlela, okokuqala, ii-LED zemibala eyahlukeneyo, ngakumbi ii-LED eziluhlaza, kufuneka zibe yimithombo yokukhanya esebenzayo.Oku kunokubonwa kwinto yokuba ukukhanya okuluhlaza kubala malunga ne-69% "yokukhanya okumhlophe kwe-isoenergy".Okwangoku, ukukhanya okukhanyayo kwee-LED eziluhlaza kunye nobomvu kuphezulu kakhulu, kunye nokusebenza kwe-quantum yangaphakathi kudlula i-90% kunye ne-95% ngokulandelanayo, kodwa ukusebenza kwe-quantum yangaphakathi yee-LED eziluhlaza kusemva kakhulu.Esi siganeko sokukhanya okuphantsi kokukhanya okuluhlaza kwee-LED ezisekwe kwiGaN kubizwa ngokuba “sisikhewu sokukhanya okuluhlaza.”Isizathu esona sizathu kukuba ii-LED eziluhlaza azikafumani izinto zazo ze-epitaxial.Izinto ezikhoyo ze-phosphorus arsenic nitride series zinokusebenza okuphantsi kakhulu kuluhlu lwespectrum emthubi-luhlaza.Nangona kunjalo, ukusebenzisa izixhobo ze-epitaxial ezibomvu okanye eziluhlaza okwesibhakabhaka ukwenza ii-LED eziluhlaza ziya Ngaphantsi kweemeko ezisezantsi zoxinaniso lwangoku, kuba akukho lahleko yokuguqulwa kwephosphor, i-LED eluhlaza inokukhanya okuphezulu okuphezulu kunokukhanya okuluhlaza + kwephosphor.Kuxelwe ukuba ukusebenza kwayo okukhanyayo kufikelela kwi-291Lm / W phantsi kwe-1mA imeko yangoku.Nangona kunjalo, ukusebenza okukhanyayo kokukhanya okuluhlaza okubangelwa yimpembelelo yeDroop kwehla kakhulu kwimisinga emikhulu.Xa ukuxinana kwangoku kwanda, ukusebenza kakuhle okukhanyayo kwehla ngokukhawuleza.Kwi-350mA yangoku, ukusebenza kakuhle okukhanyayo yi-108Lm/W.Ngaphantsi kweemeko ze-1A, ukusebenza okukhanyayo kuyancipha.ukuya kuma-66Lm/W.

Kwiqela le-III phosphides, ukukhutshwa kokukhanya kwibhanti eluhlaza kuye kwaba ngumqobo osisiseko kwiinkqubo zezinto eziphathekayo.Ukutshintsha ukubunjwa kwe-AlInGaP ukuze ikhuphe okuluhlaza kunombala obomvu, o-orenji okanye otyheli kubangela ukungonelanga komthuthi ngenxa yesikhewu samandla esisezantsi ngokwentelekiso kwisixokelelwano sezinto eziphathekayo, esithintela ukuhlanganiswa okusebenzayo kwemitha.

Ngokwahlukileyo, kunzima kakhulu kwi-III-nitrides ukufezekisa ukusebenza kakuhle okuphezulu, kodwa ubunzima abunakugqithiswa.Ukusebenzisa le nkqubo, ukwandisa ukukhanya kwibhendi yokukhanya okuluhlaza, izinto ezimbini eziza kubangela ukunciphisa ukusebenza kakuhle: ukuhla kwe-quantum yangaphandle kunye nokusebenza kombane.Ukuncipha kokusebenza komyinge wangaphandle kuvela kwinto yokuba nangona umsantsa oluhlaza usezantsi, ii-LED eziluhlaza zisebenzisa amandla ombane aphezulu weGaN, nto leyo ebangela ukuba izinga lokuguqulwa kwamandla lehle.Ububi besibini kukuba i-LED eluhlaza iyancipha njengoko inxinano yangoku yenaliti isanda kwaye ibanjiswa yi-droop effect.Impembelelo yeDroop iyenzeka nakwii-LED eziluhlaza, kodwa impembelelo yayo inkulu kwii-LED eziluhlaza, okukhokelela ekusebenzeni okusezantsi kwesiqhelo kwangoku.Nangona kunjalo, kukho iingcamango ezininzi malunga nezizathu zempembelelo ye-droop, kungekhona nje i-Auger recombination - zibandakanya ukuchithwa, ukugqithiswa kwe-carrier okanye ukuvuza kwe-electron.Le yokugqibela iphuculwe yintsimi yombane yangaphakathi ene-voltage ephezulu.

Ngoko ke, indlela yokuphucula ukukhanya kwe-LED eluhlaza: kwelinye icala, funda indlela yokunciphisa i-Droop effect phantsi kweemeko zezinto ezikhoyo ze-epitaxial ukuphucula ukukhanya kokukhanya;kwelinye icala, sebenzisa ukuguqulwa kwe-photoluminescence yee-LED eziluhlaza kunye ne-phosphors eluhlaza ukukhupha ukukhanya okuluhlaza.Le ndlela inokufumana ukukhanya okuluhlaza okuphezulu, okunokuthi kufikeleleke ngokufanelekileyo ukukhanya okuphezulu kunokukhanya okumhlophe kwangoku.Ukukhanya okuluhlaza okungaqhelekanga, kunye nokuncipha kokucoceka kombala okubangelwa ukwanda kwayo kwe-spectral akuthandeki kwimiboniso, kodwa ayifanelekanga kubantu abaqhelekileyo.Akukho ngxaki yokukhanyisa.Ukukhanya okuluhlaza okusebenzayo okufunyenwe yile ndlela kunethuba lokuba mkhulu kune-340 Lm / W, kodwa akusayi kudlula i-340 Lm / W emva kokudibanisa nokukhanya okumhlophe.Okwesithathu, qhubeka nokuphanda kwaye ufumane izixhobo zakho ze-epitaxial.Kungale ndlela kuphela, kukho intlantsi yethemba.Ngokufumana ukukhanya okuluhlaza okungaphezulu kwe-340 Lm/w, ukukhanya okumhlophe kudityaniswe nemibala emithathu ye-LEDs ebomvu, eluhlaza kunye noluhlaza okwesibhakabhaka kunokuba phezulu kunomda wokusebenza okhanyayo we-340 Lm/w yohlobo lwe-blue chip-uhlobo olumhlophe lwe-LEDs. .W.

3. I-Ultraviolet LEDchip + ezintathu umbala ophambili phosphors zikhupha ukukhanya.

Esona siphene siphambili kwezi ntlobo zimbini zingasentla zee-LED ezimhlophe kukwabiwa kwendawo engalinganiyo yokukhanya kunye nechromaticity.Ukukhanya kwe-Ultraviolet akunakubonwa ngeso lomntu.Ke ngoko, emva kokuba ukukhanya kwe-ultraviolet kuphuma kwi-chip, ifunxwa yimibala emithathu ephambili yephosphors kumaleko wokupakisha, kwaye iguqulwa ibe kukukhanya okumhlophe yi-photoluminescence ye-phosphors, emva koko ikhutshwe esithubeni.Le yeyona nzuzo inkulu, njengezibane zemveli ze-fluorescent, ayinakho ukungalingani kombala wendawo.Nangona kunjalo, ukukhanya kwethiyori yokukhanya kwe-ultraviolet chip emhlophe ye-LED ayinakuba phezulu kunexabiso lethiyori yokukhanya okumhlophe kwe-blue chip, singasathethi ke ngexabiso lethiyori lokukhanya okumhlophe kwe-RGB.Nangona kunjalo, kuphela ngokuphuhliswa komgangatho ophezulu we-phosphors wemibala emithathu efanelekileyo yokuvuselela i-ultraviolet apho sinokufumana ii-LED ezimhlophe ze-ultraviolet ezikufutshane okanye ezisebenza ngakumbi kunezi zimbini ze-LED ezimhlophe kweli nqanaba.Ukusondela kwii-LEDs ze-ultraviolet eziluhlaza, kokukhona zinokwenzeka.Inkulu, i-medium-wave kunye ne-short-wave ye-UV uhlobo olumhlophe lwe-LEDs ayinakwenzeka.