1. Blue-LED guntu + rawaya-kore phosphor nau'in gami da Multi-launi phosphor wanda aka samu iri.

 Rawan phosphor mai launin rawaya-kore yana ɗaukar wani ɓangare nablue haskena LED guntu don samar da photoluminescence, da kuma sauran bangare na blue haske daga LED guntu ana daukar kwayar cutar daga cikin phosphor Layer da haɗe da rawaya-kore haske fitar da phosphor a wurare daban-daban a cikin sarari, da kuma ja. An gauraya haske kore da shuɗi don ya zama farin haske;Ta wannan hanyar, mafi girman darajar ka'idar phosphor photoluminescence ingantaccen juzu'i, wanda shine ɗayan ƙimar ƙimar waje, ba zai wuce 75% ba;kuma mafi girman hakar haske daga guntu zai iya kaiwa kusan 70% kawai, don haka a cikin ka'idar, haske mai launin shuɗi Mafi girman ingancin hasken LED ba zai wuce 340 Lm/W ba, kuma CREE ya kai 303Lm/W a cikin 'yan shekarun da suka gabata.Idan sakamakon gwajin daidai ne, yana da daraja a yi bikin.

2. Haɗin ja, kore da shuɗiLED RGBnau'in ya haɗa da nau'in RGBW-LED, da dai sauransu.

 Diodes guda uku masu fitar da haske na R-LED (ja) + G-LED (kore) + B- LED (blue) suna haɗuwa tare, kuma manyan launuka uku na farko na ja, kore da shuɗi suna gauraye kai tsaye a sararin samaniya don zama fari. haske.Don samar da ingantaccen haske mai inganci ta wannan hanyar, da farko, LEDs masu launuka daban-daban, musamman koren LED, dole ne su kasance tushen hasken haske mai inganci, wanda za'a iya gani daga “daidaitaccen haske farin haske” wanda hasken kore ya ke da lissafin. kusan 69%.A halin yanzu, ingancin hasken wutar lantarki na shuɗi da jajayen ledoji ya yi girma sosai, tare da ƙimar ƙididdigewa na ciki ya wuce 90% da 95%, bi da bi, amma ingancin ƙima na ciki na koren LEDs ya yi nisa a baya.Wannan al'amari na ƙarancin haske mai ƙarancin haske na LEDs na tushen GaN ana kiransa "rabin haske kore."Babban dalili shi ne cewa koren LEDs ba su sami nasu kayan epitaxial ba.Abubuwan da suka wanzu na phosphorous arsenic nitride suna da ƙarancin inganci a cikin bakan rawaya-kore.Ana amfani da kayan epitaxial ja ko shuɗi don yin koren ledoji.A ƙarƙashin yanayin ƙananan ƙarancin halin yanzu, saboda babu asarar canjin phosphor, koren LED yana da ingantaccen haske fiye da shuɗi + nau'in phosphor koren haske.An ba da rahoton cewa ingancinsa mai haske ya kai 291Lm/W a ƙarƙashin yanayin 1mA na yanzu.Koyaya, raguwar ingancin hasken koren haske wanda tasirin Droop ya haifar a ƙarƙashin babban halin yanzu yana da mahimmanci.Lokacin da yawa na yanzu ya karu, ingancin hasken ya ragu da sauri.A halin yanzu na 350mA, ingantaccen hasken shine 108Lm/W.Ƙarƙashin yanayin 1A, ingancin hasken ya ragu.Zuwa 66Lm/W.

Don phosphines na III, fitar da haske zuwa ga koren band ya zama babban cikas ga tsarin kayan.Canza abun da ke ciki na AlInGaP don sanya shi fitar da koren haske maimakon ja, orange ko rawaya-wanda ke haifar da ƙarancin iyakancewar jigilar kaya ya faru ne saboda ƙarancin ƙarancin kuzarin tsarin kayan aiki, wanda ya keɓance ingantaccen haɗewar radiation.

Sabili da haka, hanyar da za a inganta ingantaccen haske na koren LEDs: a gefe guda, nazarin yadda za a rage tasirin Droop a ƙarƙashin yanayin kayan epitaxial na yanzu don inganta ingantaccen haske;a na biyu, yi amfani da jujjuyawar photoluminescence na LEDs shuɗi da koren phosphor don fitar da hasken kore.Wannan hanyar na iya samun ingantaccen haske mai haske mai haske, wanda a zahiri zai iya samun ingantaccen haske fiye da farin haske na yanzu.Nasa ne na hasken kore mara-kwatsam.Babu matsala tare da hasken wuta.Tasirin hasken koren da aka samu ta wannan hanya na iya zama mafi girma fiye da 340 Lm/W, amma har yanzu ba zai wuce 340 Lm/W ba bayan hada farin haske;na uku, ci gaba da bincike da kuma nemo naku kayan aikin epitaxial, kawai ta wannan hanyar, akwai kyakyawan bege cewa bayan samun hasken kore wanda ya fi 340 Lm/w, farin haske ya haɗe da launuka na farko guda uku na ja. LEDs kore da shuɗi na iya zama mafi girma fiye da ƙimar ingantaccen haske na shuɗi guntu farin LEDs na 340 Lm/W.

3. Ultraviolet LEDguntu + phosphor kala uku na farko suna fitar da haske 

Babban lahani na waɗannan nau'ikan fararen LEDs guda biyu na sama shine rashin daidaituwa rarraba sarari na haske da chromaticity.Hasken ultraviolet ba ya iya hangowa ta idon ɗan adam.Sabili da haka, bayan hasken ultraviolet ya fita daga guntu, ana ɗaukar shi da nau'in phosphorus na farko na launi guda uku na encapsulation Layer, wanda ya canza zuwa farin haske ta hanyar photoluminescence na phosphor, sa'an nan kuma ya fito cikin sararin samaniya.Wannan ita ce babbar fa'idarsa, kamar fitilun fitilu na gargajiya, ba shi da rashin daidaituwar launi na sarari.Koyaya, ingantaccen ingantaccen haske na ultraviolet guntu-nau'in farin haske LED ba zai iya zama sama da ƙimar ƙimar farin nau'in shuɗi mai launin shuɗi ba, balle ƙimar ka'idar farin haske nau'in RGB.Duk da haka, kawai ta hanyar haɓaka manyan phosphor uku na farko da suka dace da tashin hankali na ultraviolet za a iya samun damar samun haske mai haske na ultraviolet wanda ke kusa ko ma mafi girma fiye da na sama biyu farin haske LEDs a wannan mataki.Mafi kusa da shuɗin hasken ultraviolet LED, yuwuwar mafi girman farin haske LED na matsakaicin kalaman da gajeriyar nau'in ultraviolet ba zai yiwu ba.