Noocyada LED-yada cad: Wadooyinka ugu muhiimsan ee farsamada ee LED-ka cad ee nalalka waa: ① Blue LED + nooca fosfoor;②RGB LED nooca;③ Ultraviolet LED + nooca fosfoor.

1. Iftiin buluug - chip LED + nooca fosfoor jaalaha-cagaaran oo ay ku jiraan derivatives phosphor midabo badan iyo noocyo kale.

Lakabka fosfor ee jaalaha-cagaaran wuxuu nuugaa qayb ka mid ah iftiinka buluuga ah ee ka soo baxa chip LED si uu u soo saaro sawir-qaadista.Qaybta kale ee nalka buluuga ah ee ka timaadda chip-ka LED waxa lagu kala qaadaa lakabka fosfoorka oo ku biira iftiinka jaalaha-cagaaran ee uu ka soo daayo fosfoorka meelo kala duwan oo bannaan ah.Nalalka casaanka, cagaarka iyo buluuga ah ayaa isku dhafan si ay u sameeyaan iftiin cad;Habkan, qiimaha aragtida ugu sarreeya ee waxtarka beddelidda phosphor photoluminescence, mid ka mid ah waxtarka tirada dibadda, kama badan doono 75%;iyo heerka ugu sarreeya ee iftiinka laga soo saaro chip wuxuu gaari karaa oo keliya 70%.Sidaa darteed, aragti ahaan, iftiinka cad ee nooca buluuga ah Waxtarka ugu badan ee iftiinka LED kama badnaan doono 340 Lm/W.Dhowrkii sano ee la soo dhaafay, CREE waxay gaartay 303Lm/W.Haddii natiijooyinka imtixaanku ay sax yihiin, waxaa habboon in la dabaaldego.

2. Casaan, cagaar iyo buluug saddex midab oo aasaasi ahNoocyada RGB LEDka mid ahRGBW- Noocyada LEDiwm.

R-LED (casaan) + G-LED (cagaaran) + B-LED (buluug) saddex diode iftiin-bixiya ayaa la isku daray, saddexda midab ee aasaasiga ah ee casaanka, cagaarka iyo iftiinka buluuga ah ee soo baxaya ayaa si toos ah loogu qasaa meel bannaan si ay u sameeyaan caddaan. iftiin.Si loo soo saaro iftiin cad oo tayo sare leh habkan, marka hore, LED-yada midabada kala duwan, gaar ahaan LED-yada cagaaran, waa inay noqdaan ilo iftiin leh.Tan waxaa laga arki karaa xaqiiqda ah in iftiinka cagaaran uu xisaabiyo qiyaastii 69% "iftiin cad oo isoenergy".Waqtigan xaadirka ah, waxtarka iftiinka leh ee buluugga iyo casaanka LED-yada ayaa aad u sarreeya, oo leh waxtarka tirada gudaha ee ka sarreeya 90% iyo 95% siday u kala horreeyaan, laakiin waxtarka gudaha gudaha ee LED-yada cagaaran ayaa aad uga dambeeya.Dhacdadan waxtarka iftiinka cagaaran ee hooseeya ee GaN-ku-saleysan LEDs waxaa loo yaqaan "farqiga iftiinka cagaaran."Sababta ugu weyn ayaa ah in LED-yada cagaaran aysan wali helin qalabkooda epitaxial.Qalabka taxan ee arsenic nitride fosfooraska ee jira ayaa waxtarkoodu aad u hooseeyo marka loo eego kala duwanaanshaha jaalaha-cagaaran.Si kastaba ha noqotee, isticmaalka walxaha epitaxial ee casaanka ama buluuga ah si loo sameeyo LEDs cagaaran waxay hoos imanayaan xaaladaha cufnaanta hoose ee hadda jira, sababtoo ah ma jiraan wax lumay fosfoor ah, LED-ga cagaaran wuxuu leeyahay waxtar sare oo iftiin leh marka loo eego buluug + fosfoor iftiin cagaaran.Waxaa la sheegay in waxtarkeeda iftiinka ahi uu gaaro 291Lm/W oo hoos timaada 1mA xaalad hadda jirta.Si kastaba ha ahaatee, waxtarka iftiinka cagaaran ee iftiinka cagaarka ah ee uu keeno saameynta Droop ayaa si weyn hoos ugu dhacda qulqulka waaweyn.Marka cufnaanta hadda korodho, waxtarka iftiinka ayaa si degdeg ah hoos ugu dhacaya.350mA hadda, hufnaanta iftiinka waa 108Lm/W.Xaaladaha 1A, waxtarka iftiinka ayaa hoos u dhacaya.ilaa 66Lm/W.

Kooxda III phosphides, iftiiminta iftiinka kooxda cagaarka ah waxay noqotay caqabad aasaasi ah nidaamyada walxaha.Beddelida ka kooban AlInGaP si ay u soo saarto cagaar halkii ay ka ahaan lahayd casaan, oranji ama huruud ah waxay keenaysaa xannibaad ku filnaansho la'aan sababtoo ah faraqa tamarta yar ee nidaamka walxaha, taas oo meesha ka saaraysa dib-u-habaynta shucaaca ee hufan.

Taas bedelkeeda, way ku adag tahay III-nitrides si loo gaaro waxtarka sare, laakiin dhibaatooyinka maaha kuwo laga gudbi karo.Isticmaalka nidaamkan, fidinta iftiinka kooxda iftiinka cagaaran, laba arrimood oo keeni doona hoos u dhaca waxtarka ayaa ah: hoos u dhaca waxtarka tirada dibadda iyo waxtarka korontada.Hoos-u-dhaca ku-oolnimada tirada dibadda waxay ka timaaddaa xaqiiqada in kasta oo faraqa band-cagaarku hooseeyo, LED-yada cagaaran waxay adeegsadaan GaN ee danab hore u sarreeya, taas oo sababta heerka beddelka awoodda inuu hoos u dhaco.Khasaaraha labaad ayaa ah in LED-ka cagaaran uu yaraado marka cufnaanta hadda la isku duro uu kordho oo ay ku xayiran tahay saameynta hoos u dhaca.Saamaynta Droop waxay sidoo kale ku dhacdaa LED-yada buluuga ah, laakiin saameynteedu waxay ku weyn tahay LED-yada cagaaran, taasoo keentay hoos u dhaca waxtarka hawlgalka ee hadda jira.Si kastaba ha ahaatee, waxaa jira mala-awaal badan oo ku saabsan sababaha hoos u dhaca, ma aha oo kaliya dib-u-habaynta Auger - waxaa ka mid ah kala-baxa, qulqulka sidaha ama dareeraha elektaroonigga ah.Tan dambe waxaa lagu xoojiyay koronto gudaha ah oo koronto ah.

Sidaa darteed, habka loo hagaajiyo waxtarka iftiinka iftiinka cagaaran ee LEDs: dhinaca kale, baro sida loo yareeyo saameynta Droop ee shuruudaha qalabka epitaxial ee jira si loo hagaajiyo iftiinka iftiinka;Dhanka kale, isticmaal beddelka sawir-qaadista ee LED-yada buluuga ah iyo fosfoorrada cagaaran si ay u sii daayaan iftiinka cagaaran.Habkani wuxuu heli karaa iftiin cagaaran oo tayo sare leh, kaas oo aragti ahaan lagu gaari karo iftiin ka sarreeya iftiinka cad ee hadda jira.Waa iftiin cagaaran oo aan iskeed ahayn, iyo hoos u dhaca nadiifnimada midabka ee ay keento fidinta muuqaalkeeda ayaa ah mid aan u fiicnayn bandhigyada, laakiin kuma habboona dadka caadiga ah.Wax dhib ah kuma laha nalkaWaxtarka iftiinka cagaarka ah ee lagu helo habkani wuxuu leeyahay suurtogalnimada inuu ka weyn yahay 340 Lm / W, laakiin weli kama badan doono 340 Lm / W ka dib marka la isku daro iftiinka cad.Marka saddexaad, sii wad baaritaanka oo hel qalabkaaga epitaxial.Sidan oo keliya, waxaa jirta rajo iftiimaya.Helitaanka iftiinka cagaarka ah ee ka sarreeya 340 Lm / w, iftiinka cad oo ay weheliyaan saddexda midab ee LEDs ee casaanka, cagaarka iyo buluuga waxay ka sarreeyaan xadka waxtarka iftiinka ee 340 Lm / w ee nooca buluugga ah ee nalka iftiinka cad ee buluuga ah. .W.

3. Ultraviolet LEDchip + saddex fosfooraska midabka aasaasiga ah ayaa iftiimiya iftiinka.

Ciladda ugu weyn ee ka jirta labada nooc ee kor ku xusan ee LED-yada cad waa qaybinta aan sinnayn ee iftiinka iyo chromaticity.Iftiinka ultraviolet ma dareemi karo isha bini'aadamka.Sidaa darteed, ka dib marka iftiinka ultraviolet uu ka baxo chips, waxaa nuugaya saddexda fosfooraska midabka aasaasiga ah ee lakabka baakadaha, waxaana loo beddelaa iftiin cad by photoluminescence ee phosphoors, ka dibna u sii daayo meel bannaan.Tani waa faa'iidada ugu weyn, sida nalalka dhaadheer ee dhaqameed, ma laha sinnaansho midab meel bannaan.Si kastaba ha noqotee, hufnaanta iftiinka aragtida iftiinka ultraviolet ee iftiinka cad ee iftiinka LED kama sarreyn karo qiimaha aragtida ee nalka buluuga ah ee buluuga ah, iska daa qiimaha aragtida ee iftiinka cad ee RGB.Si kastaba ha ahaatee, kaliya iyada oo loo marayo horumarinta waxtarka sare leh ee saddexda midab ee aasaasiga ah ee ku habboon kicinta ultraviolet waxaan ku heli karnaa LED-yada cadcad ee ultraviolet kuwaas oo ku dhow ama xitaa ka waxtar badan marka loo eego labada LEDs cad ee kor ku xusan.Sida ugu dhow ee LED-yada ultraviolet buluuga ah waa, inta badan waxay u badan tahay.Way weyn tahay, mawjadaha dhexdhexaadka ah iyo nooca gaaban ee UV-ga LED-yada cad maahan suurtagal.