1. Blue LED chip + yellow green phosphor, kusanganisira polychrome phosphor derivative

Iyo yero yegirini phosphor layer inotora mwenje weblue wevamweLED chipskubudisa photoluminescence, uye chiedza chebhuruu kubva kumachipi e LED chinobuda kunze kwephosphor layer uye chinoshandura nechiedza chegirini cheyero chinobudiswa nephosphor panzvimbo dzakasiyana-siyana munzvimbo, uye chiedza chebhuruu chebhuruu chinosanganiswa kuita chiedza chichena; Nenzira iyi, iyo yakawanda theoretical kukosha kwe photoluminescence kutendeuka kwekushanda kwephosphor, imwe yekunze kwehuwandu hwehuwandu hwehuwandu, haingapfuuri 75%; Iyo yakanyanya kudhirowa mwero wechiedza kubva kune chip inogona chete kusvika pa70%. Naizvozvo, ne theoretically, iyo yakanyanya kupenya yakajeka yeblue mwenje chena LED haipfuure 340 Lm/W, uye CREE ichasvika 303 Lm/W makore mashoma apfuura. Kana mhinduro dzebvunzo dzakarurama, zvakakodzera kupemberera.

2. Tsvuku yakasvibira yebhuruu matatu ekutanga mavara ekubatanidza RGB LED mhando, kusanganisira RGB W LED mhando, nezvimwe

Vatatuchiedza-emittingdiode, R-LED (tsvuku)+G-LED (girinhi)+B-LED (bhuruu), zvinosanganiswa kuita chiedza chichena nekusanganisa zvakananga chiedza chitsvuku, chegirinhi nebhuruu chinobudiswa muchadenga. Kuti ibudise chiedza chakakwirira chinopenya chichena nenzira iyi, chekutanga, mavara e LED, kunyanya ma LED egirini, anofanirwa kunge ari magetsi anobudirira, ayo anoita 69% ye "equal energy white light". Parizvino, kujeka kwechiedza chebhuruu LED uye tsvuku LED kwave kwakanyanya, nemukati quantum kunyatsoita zvinopfuura 90% uye 95% zvichiteerana, asi yemukati quantum kunyatsoshanda kwegirinhi LED kuri kumashure. Ichi chiitiko cheyakadzika girini mwenje kushanda kweGaN yakavakirwa LED inonzi "girinhi mwenje gap". Chikonzero chikuru ndechekuti iyo yakasvibira LED haisati yawana yayo epitaxial zvinhu. Kushanda kweiyo iripo phosphorus arsenic nitride series zvinhu yakadzikira muyero yegirini chromatographic range. Nekudaro, iyo girini LED inogadzirwa nemwenje tsvuku kana yebhuruu mwenje epitaxial zvinhu. Pasi pemamiriro ekuderera kwazvino density, nekuti hapana phosphor kutendeuka kurasikirwa, iyo yegirini LED ine yakanyanya kupenya inopenya kupfuura yebhuruu mwenje + phosphor girini mwenje. Zvinonzi kushanda kwayo kunopenya kunosvika 291Lm/W pasi pezvino zve1mA. Nekudaro, pasi peiyo yazvino, kupenya kwechiedza chegirinhi kunokonzerwa neDroop maitiro kunoderera zvakanyanya. Kana iyo density iripo inowedzera, iyo inopenya inoshanda inoderera nekukurumidza. Pasi pe 350mA ikozvino, kupenya kwakanaka ndeye 108Lm/W, uye pasi pe 1A mamiriro, kupenya kwakanaka kunoderera kusvika 66Lm/W.

Kune boka III phosphides, kubudisa chiedza kune yakasvibira bhendi chave chipingamupinyi chikuru chegadziriro yezvinhu. Kuchinja kuumbwa kweAlInGaP kuitira kuti ibudise chiedza chegirini panzvimbo pechitsvuku, orenji kana yero - kukonzera kusakwana mutakuri wemutakuri kunokonzerwa nekudzikira kwesimba gap reiyo zvinhu system, iyo inodzivirira inoshanda nemwaranzi kudzokororwa.

Kusiyana neizvi, zvakanyanya kuoma kuBoka III nitrides kuti iwane hunyanzvi hwepamusoro, asi kuomerwa hakugoneki. Kana mwenje uchiwedzerwa kune yakasvibira mwenje bhendi nehurongwa uhu, izvo zviviri zvinozoderedza kushanda zvakanaka ndezvekunze kwehuwandu hwekunze uye kugona kwemagetsi. Kudzikira kwekunze kwehuwandu hwehuwandu hunobva pachokwadi chekuti kunyangwe iyo girinhi bhendi gap yakadzikira, iyo yakasvibira LED inoshandisa yakakwira kumberi voltage yeGaN, iyo inoderedza chiyero chekushandura simba. Chechipiri chinokanganisa ndechekuti giriniLED inodereranekuwedzera kwejekiseni ikozvino density uye inobatwa ne droop effect. Droop effect inoonekwawo mublue LED, asi yakanyanya kushata mugirinhi LED, zvichikonzera kuderera kwekuita kwezvakajairwa kushanda ikozvino. Nekudaro, kune zvikonzero zvakawanda zvekudonhedza maitiro, kwete chete Auger recombination, asiwo dislocation, mutakuri mafashama kana kubuda kwemagetsi. Iyo yekupedzisira inowedzerwa neiyo yakakwira voltage mukati memunda wemagetsi.

Nokudaro, nzira dzekuvandudza kupenya kwechiedza che LED yakasvibirira: kune rumwe rutivi, dzidza kuti ungaderedza sei Drop effect yekuvandudza kubwinya kunopenya pasi pemamiriro ezvinhu aripo epitaxial zvinhu; Kune rimwe divi, iyo yebhuruu LED pamwe negirini phosphor inoshandiswa kushandura photoluminescence kuburitsa girinhi mwenje. Iyi nzira inokwanisa kuwana mwenje wegirinhi nekupenya kwakanyanya, izvo zvinotemerwa zvinokwanisa kuwana kupenya kwakanyanya kudarika mwenje chena iripo. Ndechechiedza chegirini chisingachinji. Iko kuchena kwemavara kuderera kunokonzerwa nekuwedzera kwayo kwe spectral hakuna kunaka kuratidzwa, asi harisi dambudziko kune zvakajairika mwenje. Zvinogoneka kuwana girini inopenya inobudirira kupfuura 340 Lm/W, Zvisinei, chiedza chakabatanidzwa chichena hachipfuure 340 Lm/W; Chechitatu, ramba uchitsvaga uye uwane yako epitaxial zvinhu. Nenzira iyi chete ndipo panogona kuve nekupenya kwetariro kuti mushure mekuwana mwenje wegirini wakawanda kupfuura 340 Lm/w, mwenje chena wakasanganiswa nedzvuku, girinhi uye bhuruu matatu ekutanga mavara maLED anogona kunge akakwira kupfuura mwenje weblue chip. chena LED ye340 Lm/W.

3. Ultraviolet LED chip + tri color phosphor

Chikanganiso chikuru chemhando mbiri dziri pamusoro dze LED chena ndechekuti kugoverwa kwenzvimbo kwekupenya uye chroma hakuna kuenzana. Chiedza cheUV hachionekwe neziso remunhu. Naizvozvo, iyo UV mwenje inoburitswa kubva ku chip inotorwa neiyo tri color phosphor yeyekurongedza layer, yobva yashandurwa kubva kuphotoluminescence yephosphor kuenda kuchena mwenje uye inoburitswa munzvimbo. Iyi ndiyo mukana wayo mukuru, sezvakangoita mwenje wefluorescent, hauna nzvimbo isina kuenzana ruvara. Nekudaro, iyo theoretical luminous performance yeiyo ultraviolet chip mhando chena LED haigone kuve yakakwira kupfuura kukosha kweiyo yeblue chip mhando chena mwenje, rega kutomboti iyo theoretical kukosha kweRGB rudzi chena mwenje. Nekudaro, chete nekugadzira yakanyatsoita tricolor phosphors inokodzera UV mwenje wekusimudzira zvinogoneka kuwana ultraviolet chena LED ine yakafanana kana yepamusoro mwenje kunyatsoshanda kupfuura maviri machena maLED ataurwa pamusoro apa padanho rino. Iyo iri padyo neiyo ultraviolet LED kune mwenje webhuruu, zvakanyanya mukana wekuve, uye chena LED ine yepakati wave uye pfupi wave ultraviolet mitsetse hazvigoneke.