White LED mhando: Iwo makuru tekinoroji nzira dze chena LED yekuvhenekesa ndeiyi: ① Blue LED + phosphor mhando;②RGB LED mhando;③ Ultraviolet LED + phosphor mhando.

1. Chiedza chebhuruu - LED chip + yellow-green phosphor mhando inosanganisira yakawanda-mavara phosphor derivatives uye mamwe marudzi.

Iyo yero-yegirini phosphor layer inotora chikamu chechiedza chebhuruu kubva ku LED chip kugadzira photoluminescence.Chimwe chikamu chechiedza chebhuruu kubva ku LED chip chinofambiswa kuburikidza nefosphor layer uye chinosanganiswa neyero-yegirini mwenje unoburitswa nephosphor munzvimbo dzakasiyana munzvimbo.Zviedza zvitsvuku, zvegirini nebhuruu zvinosanganiswa kuita chiedza chichena;Munzira iyi, iyo yepamusoro-soro ye theoretical kukosha kwephosphor photoluminescence kutendeuka kwekugadzirisa, imwe yekunze kwehuwandu hwehuwandu hwehuwandu, haingapfuuri 75%;uye iyo yakanyanya kudhirowa mwenje mwero kubva kune chip inogona kungosvika nezve 70%.Naizvozvo, ne theoretically, bhuruu-mhando chena mwenje Iyo yakanyanya LED inopenya inoshanda haipfuure 340 Lm/W.Mumakore mashoma apfuura, CREE yakasvika 303Lm/W.Kana mhinduro dzebvunzo dzakarurama, zvakakodzera kupemberera.

2. Tsvuku, girini uye bhuruu kusanganiswa kwemavara matatu ekutangaRGB LED mhandosanganisiraRGBW- LED mhando, nezvimwewo.

R-LED (tsvuku) + G-LED (girinhi) + B-LED (bhuruu) madhiodhi matatu anobudisa chiedza anosanganiswa pamwe chete, uye mavara matatu ekutanga emwenje matsvuku, egirinhi nebhuruu anoburitswa anosanganiswa zvakananga muchadenga kuita chena. chiedza.Kuti ibudise chiedza chakachena chepamusoro-soro nenzira iyi, kutanga kune zvose, ma LED emarudzi akasiyana-siyana, kunyanya ma LED egirini, anofanira kunge ari magetsi anoshanda.Izvi zvinogona kuonekwa kubva pakuti chiedza chegirini chinotora 69% ye "isoenergy white light".Parizvino, kupenya kwakanaka kweblue uye tsvuku LED kwave kwakanyanya, nemukati quantum efficiencies inodarika 90% uye 95% zvakateerana, asi iyo yemukati quantum kunyatsoshanda kwegirinhi LEDs inosarira kumashure.Ichi chiitiko chekushomeka kwechiedza chegirini cheGaN-based LEDs chinonzi "green light gap."Chikonzero chikuru ndechekuti maLED akasvibira haasati awana epitaxial zvinhu zvavo.Iyo iripo phosphorus arsenic nitride yakatevedzana zvinhu zvine yakaderera zvakanyanya muyero-yegirini spectrum renji.Nekudaro, kushandisa tsvuku kana yebhuruu epitaxial zvinhu kugadzira girinhi ma LEDs ichaita Pasi pepasi yazvino density mamiriro, nekuti hapana phosphor kutendeuka kurasikirwa, yegirini LED ine yakanyanya kupenya kupenya kupfuura yebhuruu + phosphor girini mwenje.Zvinonzi kushanda kwayo kunopenya kunosvika 291Lm/W pasi pe1mA yazvino mamiriro.Nekudaro, iko kupenya kwechiedza chegirinhi chakakonzerwa neDroop mhedzisiro inodonha zvakanyanya pamafungu makuru.Kana iyo density iripo inowedzera, iyo inopenya inoshanda inodonha nekukurumidza.Pa350mA ikozvino, iyo inopenya inoshanda ndeye 108Lm/W.Pasi pemamiriro e1A, iyo inopenya inoshanda inoderera.kusvika ku66Lm/W.

Kune Boka III phosphides, kuburitsa mwenje mugirinhi bhendi chave chipingamupinyi chakakosha kune masisitimu emidziyo.Kuchinja kuumbwa kweAlInGaP kuitira kuti ibudise girinhi kwete tsvuku, orenji kana yero zvinokonzeresa kusakwana mutakuri wehusungwa nekuda kwekuderera kwesimba gap reiyo zvinhu system, izvo zvinotadzisa kunyatsoshanda kweradiative recombination.

Kusiyana neizvi, zvakanyanya kuoma kuti III-nitrides iwane kushanda kwepamusoro, asi matambudziko haagoneki.Uchishandisa iyi sisitimu, kuwedzera mwenje kune yakasvibira mwenje bhendi, zvinhu zviviri zvinokonzeresa kuderera kwekubudirira ndezvekuti: kuderera kwekunze kwehuwandu hwekuita uye kugona kwemagetsi.Kudzikira kwekunze kwehuwandu hunoshanda kunobva pachokwadi chekuti kunyangwe iyo girinhi bhendi gap yakadzikira, maLED egirinhi anoshandisa GaN yakakwira kumberi voltage, izvo zvinoita kuti simba rekushandura ridzike.Chechipiri chakashata ndechekuti iyo yakasvibira LED inodzikira sezvo jekiseni ikozvino density inowedzera uye inobatwa neiyo droop athari.Iyo Droop mhedzisiro inoitikawo mubhuruu LEDs, asi kukanganisa kwayo kwakakura mugirinhi LEDs, zvichikonzera kuderera kwakajairika kushanda ikozvino kushanda zvakanaka.Nekudaro, kune akawanda efungidziro nezve zvikonzero zvekudonha mhedzisiro, kwete chete Auger recombination - dzinosanganisira dislocation, mutakuri mafashama kana kubuda kweelectron.Iyo yekupedzisira inowedzerwa ne-high-voltage mukati memagetsi emagetsi.

Nokudaro, nzira yekuvandudza chiedza chechiedza che LED dzakasvibirira: kune rumwe rutivi, dzidza kuti ungaderedza sei Drop effect pasi pemamiriro ezvinhu aripo epitaxial zvinhu kuti uvandudze kushanda kwechiedza;kune rimwe divi, shandisa iyo photoluminescence shanduko yeblue LEDs uye girinhi phosphors kuburitsa girinhi mwenje.Iyi nzira inokwanisa kuwana mwenje wakasvibira wepamusoro-soro, uyo ne theoretically unokwanisa kuwana mwenje wepamusoro-soro pane mwenje chena iripo.Iyo isiri-yega yakasvibira mwenje, uye kuderera kwekuchena kwemavara kunokonzerwa neayo spectral kuwedzera hakuna kunaka kune zviratidziro, asi haina kukodzera vanhuwo zvavo.Hapana dambudziko rekuvhenekera.The green light efficacy yakawanikwa nenzira iyi ine mukana wekuva mukuru kudarika 340 Lm/W, asi haichapfuuri 340 Lm/W mushure mekubatanidza nechiedza chichena.Chechitatu, ramba uchitsvaga uye uwane yako epitaxial zvinhu.Nenzira iyi chete, pane kupenya kwetariro.Nekuwana mwenje wegirinhi unopfuura 340 Lm/w, iwo mwenje chena akasanganiswa neatatu ekutanga mavara maLED ered, girinhi uye bhuruu anogona kukwirisa kupfuura inopenya yekugonesa muganhu we340 Lm/w yeblue chip-type chena ma LEDs. .W.

3. Ultraviolet LEDchip + matatu ekutanga mavara phosphors anoburitsa mwenje.

Chikanganiso chikuru chemhando mbiri dziri pamusoro dzema LED machena ndiko kusaenzana kwenzvimbo yekugovera kupenya uye chromaticity.Ultraviolet chiedza haigone kuonekwa neziso remunhu.Naizvozvo, mushure mekunge mwenje we ultraviolet wabuda mu chip, inotorwa neatatu ekutanga color phosphors mupakeji layer, uye inoshandurwa kuita chena mwenje nephotoluminescence yephosphors, yobva yaburitswa muchadenga.Iyi ndiyo mukana wayo mukuru, sezvakangoita mwenje wefluorescent, haina kusaenzana kwemavara enzvimbo.Nekudaro, iyo theoretical mwenje mwenje we ultraviolet chip chena mwenje LED haigone kuve yakakwira kupfuura kukosha kweiyo theoretical yeblue chip chena mwenje, tisingareve kukosha kweiyo theoretical yeRGB chena mwenje.Nekudaro, chete kuburikidza nekuvandudzwa kwemhando yepamusoro-yemhando mitatu-yekutanga color phosphors inokodzera ultraviolet excitation tinogona kuwana ultraviolet machena ma LED ari padyo kana kutonyanya kushanda kupfuura ari pamusoro maviri machena ma LED panguva ino.Iyo iri padyo nebhuruu ultraviolet LEDs ndeye, zvakanyanya mukana iwo.Iyo yakakura iyo, iyo yepakati-wave uye pfupi-wave UV mhando machena ma LED haagone.