Ongororo yenzira huru dzehunyanzvi dzema LED machena ekuvhenekesa
White LED mhando: Iwo makuru ehunyanzvi nzira dzema LED machena ekuvhenekesa ndeaya: 1 yebhuruu LED + phosphor mhando; 2RGB LED mhando; 3 ultraviolet LED + phosphor mhando
1. Bhuruu-LED chip + yero-girinhi phosphor mhando inosanganisira yakawanda-ruvara phosphor kubva
Iyo yero-yegirini phosphor layer inotora chikamu chechiedza chebhuruu che LED chip kugadzira photoluminescence, uye chimwe chikamu chechiedza chebhuruu kubva ku LED chip chinotamisa phosphor layer uye chinochinja neyero-yegirini mwenje unoburitswa ne phosphor pa. nzvimbo dzakasiyana-siyana munzvimbo, uye chiedza chitsvuku, chegirini uye chebhuruu chinosanganiswa kuita chiedza chichena; Nenzira iyi, iyo yepamusoro-soro ye theoretical kukosha kwe photoluminescence kutendeuka kwekubudirira kweimwe yekunze kwehuwandu hwehuwandu hunobudirira haizopfuuri 75%; uye chiyero chekubvisa che chip luminescence chinogona kungosvika pa70%, saka ne theoretically, mwenje webhuruu wakachena. Kushanda kwechiedza che LED hakuzopfuure 340 Lm/W, CREE yakasvika 303Lm/W mumakore apfuura, uye zvakakodzera kupemberera kana mhinduro dzebvunzo dzakarurama.
2, Tsvuku, girini uye yebhuruu matatu ekutanga mavara ekubatanidza RGB LED mhando inosanganisira RGBW-LED mhando, nezvimwe.
R-LED (tsvuku) + G-LED (girinhi) + B- LED (bhuruu) Iwo maLED matatu akabatanidzwa, uye chiedza chitsvuku, chegirinhi nebhuruu chemavara matatu ekutanga anosanganiswa zvakananga muchadenga kuita chiedza chichena. Kuti ibudise chiedza chichena chepamusoro-soro nenzira iyi, kutanga kune zvose, ma LED emarudzi akasiyana-siyana, kunyanya ma LED egirini, anofanira kunge ari magetsi emagetsi epamusoro, anenge 69% anoonekwa kubva ku "energy white light". kushanda kwebhuruu uye tsvuku LED kwave kwakakwirira zvikuru, uye mukati mehuwandu hwehuwandu hunopfuura 90% uye 95%, zvichienderana, asi mukati mehuwandu hwehuwandu hwe LED dzakasvibirira dziri kumashure. Chiitiko chekuti GaN-yakavakirwa LED yakasvibira mwenje haishande inonzi "green light gap." Chikonzero chikuru ndechekuti iyo yakasvibira LED haina kuwana yayo epitaxial zvinhu. Iyo iripo phosphorous-arsenic nitride series zvinhu zvine yakaderera kushanda muyero-yegirini spectrum renji, uye mwenje dzvuku kana yebhuruu mwenje epitaxial zvinhu zvinoshandiswa kugadzira iyo yegirini LED. Pakudzika kwazvino density mamiriro, maLED egirinhi ane yakanyanya kupenya efficacy kupfuura yebhuruu + phosphor girini mwenje nekuda kwekusina phosphor kutendeuka kurasikirwa. Inoshumwa kuti kupenya kwechiedza kunosvika 291 Lm / W pa 1 mA.Zvisinei, chiedza chechiedza chechiedza chakasvibirira chinokonzerwa neDroop effect chinoderedzwa zvikuru pane imwe nguva huru, uye kana huwandu hwemazuva ano huchiwedzerwa, chiedza chechiedza nekukurumidza kudzikiswa. Parizvino ye350 mA, iyo inopenya inopenya i108 Lm/W, uye pasi pemamiriro e1 A, kupenya kunoshanda kunodonha kusvika 66 Lm/W.
Kune Boka III phosphides, kubudisa mwenje kune yakasvibira bhendi inova yakakosha chipingamupinyi kuhurongwa hwezvinhu. Kuchinja kuumbwa kweAlInGaP kunoita kuti ivheneke girinhi pachinzvimbo chetsvuku, orenji kana yero-zvichikonzera kusakwana kwemutakuri wemusungwa nekuda kwekushomeka kwesimba gaka reiyo zvinhu system, kubvisa kunoshanda kweradiative recombination.
Kusiyana neizvi, Group III nitrides inonyanya kuoma kuwana, asi kuoma hakugoneki. Nehurongwa uhu, zvinhu zviviri zvinoita kuti kugona kuderera nekuda kwekuwedzera kwechiedza mubhandi rakasvibirira ndeiyi: yekunze quantum kunyatsoshanda uye kuparara kwemagetsi. Kudzikira kwekunze kwehuwandu hunobudirira kunobva pakuti iyo yakasvibira LED ine yakakwira kumberi voltage yeGaN, izvo zvinoita kuti simba rekushandura riderere. Chechipiri chakashata ndechekuti iyo yakasvibira LED inodzikira sezvo jekiseni ikozvino density inowedzera, iyo inobatwa neiyo droop athari. Iyo Droop mhedzisiro inoonekwawo mublue LEDs, asi inonyanya kukosha mugirinhi LEDs, zvichikonzera kuderera kwekushanda ikozvino. Nekudaro, kune zvikonzero zvakawanda zvechikonzero chekudonhedza maitiro, kwete chete iyo Auger komboni, asiwo iyo misplacement, mutakuri mafashama kana electron leakage. Iyo yekupedzisira inowedzerwa ne high voltage mukati memunda wemagetsi.
Naizvozvo, iyo nzira yekuvandudza iyo inopenya efficacy yegirini LEDs: kune rumwe rutivi, nzira yekudzikisa iyo Drop maitiro pasi peiyo iripo epitaxial zvinhu mamiriro ekuwedzera mwenje kushanda; chechipiri, iyo photoluminescence shanduko yeblue LED pamwe negirinhi phosphor inoburitsa girinhi mwenje, Iyo nzira inogona kuwana yakakwirira-inoshanda girini mwenje, uye ne theoretically inogona kuwana yakakwirira kupfuura yazvino chena mwenje mhedzisiro, inova isiri-yega yegirini mwenje, uye kuchena kwemavara kunokonzerwa ne spectral kuwedzera kunodzikira, izvo zvisina kunaka kuratidzwa, asi kune zvakajairwa Hapana dambudziko nekuvhenekerwa. The green light effect inowanikwa nenzira iyi ine mukana weinopfuura 340 Lm/W, asi haisati yadarika 340 Lm/W mushure mekubatanidza chiedza chichena. Chechitatu, ramba uchitsvaga uye uwane epitaxial zvinhu zvayo, chete Nenzira iyi, pane tariro yokuti nekuwana chiedza chegirini yakawanda kupfuura 340 Lm/w, chiedza chichena chinosanganiswa netsvuku, girini uye bhuruu matatu ekutanga mavara ma LED anogona kuva. yakakwira kupfuura muganho wekushanda kwechiedza cheblue chip mhando chena LED 340 Lm/W.
3.UV LED chip + zvitatu zvepakutanga ruvara phosphor chiedza
Chikanganiso chikuru chema LED machena ari pamusoro apa ndiko kusaenzana kwenzvimbo yekugovera kupenya uye chromaticity. Chiedza che Ultraviolet hachioneki neziso remunhu. Naizvozvo, mushure mekunge mwenje we ultraviolet waburitswa kubva muchip, inotorwa neatatu ekutanga color phosphors ye encapsulating layer, uye iyo photoluminescence yephosphor inoshandurwa kuita chena mwenje, iyo inobva yaiswa munzvimbo. Iyi ndiyo mukana wayo mukuru, kungofanana nemarambi echinyakare efluorescent, haina kusaenzana kwemavara enzvimbo. Nekudaro, iyo theoretical mwenje maitiro eiyo ultraviolet chip mhando chena LED haigone kunge yakakwira kupfuura kukosha kweiyo theoretical yeblue chip rudzi chena mwenje, uye kashoma kuve yakakwira kupfuura kukosha kweiyo theoretical yeRGB mhando chena mwenje. Zvisinei, zviri chete kuburikidza nekuvandudzwa kwe-high-efficiency trichromatic phosphors inokodzera ultraviolet chiedza excitation kuti zvinokwanisika kuwana ultraviolet chiedza-mhando machena ma LED ari pedyo kana kutonyanya kushanda kupfuura ma LED maviri emazuva ano machena. Iyo iri padyo neblue-light ultraviolet LEDs, mukana Iyo yakakura iyo yepakati-wave uye pfupi-wave ultraviolet mhando machena ma LEDs ari, zvakanyanya kusagoneka.