1. Chip yubururu LED chip + umuhondo wicyatsi kibisi, harimo na fosifori ikomoka

Icyatsi kibisi cya fosifori gikurura urumuri rwubururu bwa bamweLED chipkubyara Photoluminescence, kandi itara ry'ubururu riva kuri chip ya LED risohoka riva muri fosifore kandi rigahinduka hamwe nicyatsi kibisi cyumuhondo cyasohowe na fosifore ahantu hatandukanye mumwanya, kandi itara ryatsi ryatsi ritukura rivanze kugirango ribe urumuri rwera; Muri ubu buryo, agaciro ntarengwa kerekana agaciro ka Photoluminescence ihindura imikorere ya fosifore, imwe mumikorere ya kwant yo hanze, ntizarenga 75%; Igipimo kinini cyo gukuramo urumuri muri chip gishobora kugera kuri 70% gusa. Kubwibyo, mubyukuri, urumuri ntarengwa rwumucyo wera LED yubururu ntirurenga 340 Lm / W, kandi CREE izagera kuri 303 Lm / W mumyaka mike ishize. Niba ibisubizo byikizamini ari ukuri, birakwiye kwishimira.

2. Umutuku wicyatsi kibisi ubururu butatu bwibanze buvanze ubwoko bwa RGB LED, harimo ubwoko bwa RGB W LED, nibindi

Batatuurumuridiode, R-LED (umutuku) + G-LED (icyatsi) + B-LED (ubururu), ihujwe no gukora urumuri rwera mu kuvanga mu buryo butaziguye urumuri rutukura, icyatsi n'ubururu rwasohotse mu kirere. Kugirango habeho urumuri rwinshi rwumucyo wera murubu buryo, mbere ya byose, LED zose zamabara, cyane cyane icyatsi kibisi, zigomba kuba isoko yumucyo ikora neza, ikaba igera kuri 69% by "urumuri rwera rufite ingufu zingana". Kugeza ubu, urumuri rwiza rwa LED yubururu na LED itukura rwabaye rwinshi cyane, hamwe na kwant imbere yimbere irenga 90% na 95%, ariko kwimbere kwimbere kwicyatsi kibisi LED iri inyuma cyane. Iyi phenomenon yumucyo muto wicyatsi cya GaN ishingiye kuri LED yitwa "icyatsi kibisi icyatsi". Impamvu nyamukuru nuko icyatsi LED kitarabona ibikoresho byacyo. Imikorere yibikoresho bya fosifore arsenic nitride yibikoresho biri hasi cyane murwego rwumuhondo rwicyatsi kibisi. Nyamara, icyatsi kibisi LED gikozwe mumatara atukura cyangwa ubururu bwibikoresho bya epitaxial. Ukurikije imiterere yubucucike buke, kubera ko nta gutakaza fosifore ihinduka, icyatsi LED gifite urumuri rwinshi kuruta urumuri rwubururu + itara ryatsi rya fosifori. Biravugwa ko imikorere yacyo yamurika igera kuri 291Lm / W munsi ya 1mA. Nyamara, munsi yumuyaga mwinshi, imikorere yumucyo wicyatsi iterwa ningaruka ya Droop igabanuka cyane. Iyo ubucucike buriho bwiyongera, imikorere yumucyo igabanuka vuba. Munsi ya 350mA yumuvuduko, imikorere yumucyo ni 108Lm / W, naho munsi ya 1A, imikorere yumucyo igabanuka kugera kuri 66Lm / W.

Kubitsinda rya III fosifike, kohereza urumuri kumurongo wicyatsi byahindutse inzitizi yibanze ya sisitemu yibintu. Guhindura ibice bya AlInGaP kugirango bisohore urumuri rwicyatsi aho kuba umutuku, orange cyangwa umuhondo - bitera kugabanuka kwabatwara bidahagije bitewe nimbaraga nke ugereranije nimbaraga za sisitemu yibintu, ibuza kongera imirasire yumuriro.

Ibinyuranye, biragoye cyane kuri nitride ya Groupe III kugera kubikorwa byiza, ariko ingorane ntizishobora kurenga. Iyo urumuri rwaguwe kumurongo wicyatsi kibisi hamwe niyi sisitemu, ibintu bibiri bizagabanya imikorere ni kwantumasi yo hanze ikora neza. Kugabanuka kwimikorere ya kwantani ituruka kukuba nubwo icyatsi kibisi icyuho kiri hasi, icyatsi LED ikoresha imbaraga ndende yimbere ya GaN, igabanya umuvuduko wo guhindura ingufu. Ikibazo cya kabiri ni icyatsiLED iragabanukahamwe no kwiyongera kwinshinge zubu kandi zifatwa ningaruka zitonyanga. Ingaruka ya Droop nayo igaragara muri LED yubururu, ariko irakomeye cyane muri icyatsi kibisi LED, bigatuma habaho imikorere mike yimikorere isanzwe. Nubwo bimeze bityo ariko, hariho impamvu nyinshi zituma habaho kugabanuka, ntabwo ari Auger recombination gusa, ahubwo no kwimurwa, gutwara ibintu byuzuye cyangwa kumeneka hakoreshejwe ikoranabuhanga. Iheruka yongerewe imbaraga na voltage yimbere imbere yumuriro w'amashanyarazi.

Kubwibyo, inzira zo kunoza imikorere yicyatsi kibisi LED: kuruhande rumwe, wige uburyo wagabanya ingaruka za Droop kugirango uzamure imikorere yumucyo mubihe byibikoresho bya epitaxial bihari; Kurundi ruhande, LED yubururu wongeyeho fosifori yicyatsi ikoreshwa muguhindura Photoluminescence kugirango itange urumuri rwatsi. Ubu buryo burashobora kubona urumuri rwicyatsi hamwe nubushobozi buhanitse, ibyo mubyukuri birashobora kugera kumurongo mwinshi kuruta urumuri rwera. Ni iy'urumuri rwatsi rutabishaka. Kugabanuka kw'ibara ryera biterwa no kwaguka kwayo ntabwo ari byiza kwerekanwa, ariko ntakibazo kumurika bisanzwe. Birashoboka kubona icyatsi kibisi kirenze 340 Lm / W, Nyamara, urumuri rwera ruvanze ntirurenga 340 Lm / W; Icya gatatu, komeza ubushakashatsi ushake ibikoresho byawe bya epitaxial. Gusa muri ubu buryo hashobora kubaho urumuri rwicyizere ko nyuma yo kubona urumuri rwatsi rurenze 340 Lm / w, itara ryera rihujwe numutuku, icyatsi nubururu bitatu byamabara yambere LED irashobora kuba hejuru kurenza urugero rwumucyo wa chip yubururu LED yera ya 340 Lm / W.

3. Ultraviolet LED chip + tri ibara rya fosifore

Inenge nyamukuru yibintu bibiri byavuzwe haruguru byera LED ni uko ikwirakwizwa ryumucyo hamwe na chroma bitaringaniye. Itara rya UV ntiriboneka mumaso yumuntu. Kubwibyo, urumuri UV rusohoka muri chip rwinjizwa na fosifori ya tri ya fosifori yo gupakira, hanyuma igahinduka kuva kuri fotoluminescence ya fosifore igahinduka urumuri rwera hanyuma ikoherezwa mu kirere. Iyi ninyungu nini cyane, kimwe nigitara gakondo cya fluorescent, ntigifite ibara ryumwanya utaringaniye. Nyamara, theoretical luminous efficient of ultraviolet chip type yera LED ntishobora kuba hejuru kurenza agaciro kerekana agaciro k'ubururu bwa chip yubururu bwumucyo wera, tutibagiwe nagaciro ka theoretical yumucyo wera wa RGB. Gusa, mugutezimbere fosifori nziza ya tricolor ikwiranye no kwishimisha urumuri rwa UV birashoboka kubona LED yera ultraviolet yera ifite urumuri rusa cyangwa rusumba urumuri rwinshi kuruta LED ebyiri zera zavuzwe haruguru muriki cyiciro. Iyo hafi ya ultraviolet LED yegereye urumuri rwubururu, birashoboka cyane, kandi LED yera ifite umurongo wo hagati hamwe n’umurongo mugufi ultraviolet ntibishoboka.