Isesengura ryinzira nyamukuru ya tekinike ya LED yera yo kumurika
Ubwoko bwa LED bwera: Inzira nyamukuru ya tekinike ya LED yera yo kumurika ni: ubwoko 1 bwa LED + fosifori; Ubwoko bwa 2RGB LED; Ubwoko bwa ultraviolet LED + ubwoko bwa fosifore
1. Ubururu-LED chip + ubwoko bwumuhondo-icyatsi kibisi kirimo fosifori yamabara menshi
Igice cya fosifori yumuhondo-icyatsi gikurura igice cyurumuri rwubururu rwa chip ya LED kugirango habeho Photoluminescence, naho ikindi gice cyurumuri rwubururu ruva kuri chip ya LED ikwirakwiza fosifore kandi igahuza nurumuri rwumuhondo-icyatsi rutangwa na fosifore kuri ingingo zitandukanye mu mwanya, n'umucyo utukura, icyatsi n'ubururu bivanga kugirango bibe urumuri rwera; Muri ubu buryo, agaciro gakomeye kerekana agaciro ka Photoluminescence ihindura imikorere ya imwe mumikorere ya kwant yo hanze ntizarenga 75%; kandi igipimo cyo gukuramo chip luminescence gishobora kugera kuri 70% gusa, kubwibyo rero, urumuri rwubururu rwera. LED urumuri ntirurenga 340 Lm / W, CREE yageze kuri 303Lm / W mumyaka yashize, kandi birakwiye kwishimira niba ibisubizo byikizamini ari ukuri.
2, Umutuku, icyatsi nubururu bitatu byibanze bibara guhuza ubwoko bwa RGB LED harimo ubwoko bwa RGBW-LED, nibindi.
R-LED (umutuku) + G-LED (icyatsi) + B- LED (ubururu) LED eshatu zahujwe, kandi itara ritukura, icyatsi nubururu ryamabara atatu yibanze avanze mumwanya kugirango bibe urumuri rwera. Kugirango habeho urumuri rwera rukora neza muri ubu buryo, mbere ya byose, LED yamabara atandukanye, cyane cyane LED yicyatsi kibisi, igomba kuba isoko yumucyo mwinshi, ibyo bikaba bigera kuri 69% bigaragara kuri "urumuri rwera" .Ubu, imikorere ya LED yubururu n umutuku yabaye hejuru cyane, kandi kwimbere yimbere irenze 90% na 95%, ariko, kwimbere kwimbere kwicyatsi kibisi LED iri inyuma cyane. Ikintu cyerekana ko urumuri rwatsi rwa LED rushingiye kuri GaN rudakora neza rwitwa "icyatsi kibisi." Impamvu nyamukuru nuko LED icyatsi itabonye ibikoresho byayo bwite. Ibikoresho bya fosifori-arsenic ya nitride yibikoresho bifite imikorere mike murwego rwumuhondo-icyatsi kibisi, kandi itara ritukura cyangwa urumuri rwubururu epitaxial rukoreshwa mugukora icyatsi LED. Mugihe cyo hasi yubucucike, icyatsi kibisi gifite urumuri rwiza kuruta ubururu + fosifori yicyatsi kibisi kubera ko nta gutakaza fosifori. Biravugwa ko imikorere yumucyo igera kuri 291 Lm / W kuri 1 mA.Nyamara, ingaruka zumucyo wurumuri rwatsi rwatewe ningaruka za Droop ziragabanuka cyane kumuyoboro munini, kandi iyo ubwinshi bwubu bwiyongereye, ingaruka zumucyo ni kumanuka vuba. Kuri ubu mA 350, imikorere yumucyo ni 108 Lm / W, kandi ukurikije imiterere ya 1 A, imikorere yumucyo igabanuka kuri 66 Lm / W.
Kubitsinda rya III fosifide, kohereza urumuri kumurongo wicyatsi bihinduka inzitizi yibanze kuri sisitemu yibintu. Guhindura imiterere ya AlInGaP ituma yaka icyatsi aho kuba umutuku, orange cyangwa umuhondo - bigatera kwifata bidahagije kubera icyuho gike gike cya sisitemu yibikoresho, bikuraho imirasire ikora neza.
Ibinyuranye, nitride ya Groupe III iragoye kubigeraho, ariko ingorane ntizishobora kurenga. Hamwe niyi sisitemu, ibintu bibiri bitera imikorere kugabanuka bitewe no kwaguka kwurumuri mumurongo wicyatsi ni: kwumwanya wo hanze no kwangirika kwamashanyarazi. Kugabanuka kwimikorere ya kwantani yo hanze ituruka kukuba icyatsi LED gifite voltage ndende imbere ya GaN, bigatuma igipimo cyo guhindura amashanyarazi kigabanuka. Ikibazo cya kabiri ni uko icyatsi LED kigabanuka uko ubwinshi bwinshinge bwiyongera, bugafatwa ningaruka zo kugabanuka. Ingaruka ya Droop nayo igaragara muri LED yubururu, ariko ni ngombwa cyane muri LED icyatsi kibisi, bivamo imbaraga nke zo gukora. Nubwo bimeze bityo ariko, hariho impamvu nyinshi zitera ingaruka ziterwa no kugabanuka, ntabwo ari uruganda rwa Auger gusa, ahubwo no gusimburwa, gutwara ibintu byuzuye cyangwa kumeneka kwa electron. Iheruka yongerewe imbaraga na voltage yimbere imbere yumuriro.
Kubwibyo, inzira yo kunoza imikorere ya LED yicyatsi kibisi: kuruhande rumwe, nigute wagabanya ingaruka za Droop mubihe bisanzwe bya epitaxial material kugirango habeho kongera urumuri; igice cya kabiri, guhinduranya Photoluminescence ya LED yubururu hiyongereyeho fosifori yicyatsi itanga urumuri rwatsi, Uburyo bushobora kubona urumuri rwicyatsi kibisi cyane, kandi mubyukuri birashobora kugera hejuru kurenza ingaruka zumucyo wera, zikaba zifite urumuri rwatsi rutari ruto, kandi ibara ryera riterwa no kwaguka kwagabanutse kugabanuka, bikaba bidakwiye kwerekanwa, ariko kubisanzwe Ntakibazo cyo kumurika. Ingaruka yicyatsi kibisi yabonetse murubu buryo ifite amahirwe arenga 340 Lm / W, ariko ntirenza 340 Lm / W nyuma yo guhuza urumuri rwera. Icya gatatu, komeza ubushakashatsi ushakishe ibikoresho byacyo bya epitaxial, gusa Muri ubu buryo, hariho ibyiringiro ko nukubona urumuri rwatsi rwinshi rurenze 340 Lm / w, urumuri rwera ruhujwe numutuku, icyatsi nubururu bitatu byamabara LED yibanze bishobora kuba hejuru yumucyo ntarengwa wurwego rwubururu bwa chip yera LED 340 Lm / W.
3.UV LED chip + itara ryibanze ryibara rya fosifore
Inenge nyamukuru iranga LED ebyiri zera zavuzwe haruguru ni ikwirakwizwa ryikwirakwizwa ryumucyo hamwe na chromaticity. Umucyo Ultraviolet ntabwo ugaragara mumaso yumuntu. Kubwibyo, nyuma yumucyo ultraviolet umaze gusohoka muri chip, yinjizwa na fosifori eshatu yibanze yibara rya fosifori, hanyuma Photoluminescence ya fosifore ihinduka urumuri rwera, hanyuma ikoherezwa mumwanya. Iyi ninyungu nini cyane, nkamatara gakondo ya fluorescent, ntabwo ifite ibara ryumwanya utaringaniye. Nyamara, urumuri rwerekana urumuri rwa ultraviolet chip ubwoko bwera LED ntishobora kuba hejuru kurenza agaciro kerekana agaciro k'ubururu bwa chip yubururu bwumucyo wera, kandi ntibishoboka kuba hejuru kurenza agaciro ka theoretical yumucyo wera wa RGB. Nubwo bimeze bityo ariko, binyuze mu iterambere rya fosifori ikora neza cyane ya fosifori ikwiranye no gushimishwa n’umucyo ultraviolet niho bishoboka kubona urumuri rwitwa ultraviolet rwerekana urumuri rwera rwegereye cyangwa rukora neza kuruta LED ebyiri zera. Kwegera ubururu-urumuri ultraviolet LEDs, ibishoboka Ninini nini yo hagati-nini na ultraviolet yo mu bwoko bwa ultraviolet ubwoko bwera LED, birashoboka cyane.