Mhando dze LED chenaNzira huru dzehunyanzvi dze LED chena dzemwenje ndeidzi: ① Bhuruu LED + phosphor rudzi; ②Rudzi rweRGB LED③ Ultraviolet LED + mhando yephosphor.

1. Chiedza chebhuruu – LED chip + yero-girini phosphor mhando inosanganisira phosphor derivatives ine mavara akawanda nedzimwe mhando.

Chidimbu chephosphor cheyero-girini chinotora chikamu chechiedza chebhuruu kubva ku LED chip kuti chigadzire photoluminescence. Chimwe chikamu chechiedza chebhuruu kubva ku LED chip chinopfuudzwa kuburikidza ne phosphor layer uye chinobatana nechiedza cheyero-girini chinoburitswa ne phosphor panzvimbo dzakasiyana munzvimbo iyi. Mwenje mitsvuku, yegirini nebhuruu inosanganiswa kuti igadzire chiedza chichena; Munzira iyi, kukosha kwepamusoro-soro kwe phosphor photoluminescence conversion efficiency, imwe ye external quantum efficiencies, haizopfuuri 75%; uye mwero wepamusoro wekuburitsa chiedza kubva ku chip unogona kusvika pa70% chete. Saka, mudzidziso, chiedza chebhuruu chena Kushanda kwepamusoro kwe LED luminous efficiency hakuzopfuuri 340 Lm/W. Mumakore mashoma apfuura, CREE yakasvika 303Lm/W. Kana mhinduro dzebvunzo dzakarurama, zvakakodzera kupembererwa.

2. Musanganiswa wemavara matatu makuru matsvuku, girini nebhuruuMhando dzeRGB LEDsanganisiraMhando dze RGBW- LED, nezvimwewo.

Ma LED eR-LED (tsvuku) + G-LED (girini) + B-LED (bhuruu) matatu ma diode anoburitsa chiedza anosanganiswa pamwe chete, uye mavara matatu makuru echiedza chitsvuku, chegirini nebhuruu anoburitswa anosanganiswa zvakananga muchadenga kuti agadzire chiedza chichena. Kuti zvibudise chiedza chichena chinoshanda zvakanyanya nenzira iyi, kutanga, ma LED emavara akasiyana-siyana, kunyanya ma LED egirini, anofanira kunge ari manyuko echiedza anoshanda zvakanaka. Izvi zvinogona kuonekwa kubva pakuti chiedza chegirini chinoita 69% ye "isoenergy white light". Parizvino, kushanda zvakanaka kwe LED dzebhuruu netsvuku kwave kwakanyanya, nekushanda zvakanaka kwemukati kwe quantum kunodarika 90% ne95% zvichiteerana, asi kushanda zvakanaka kwemukati kwe LED dzegirini kuri kumashure zvikuru. Chiitiko ichi chekushanda zvakanaka kwechiedza chegirini cheGaN-based LEDs chinonzi "green light gap." Chikonzero chikuru ndechekuti ma LED egirini haasati awana zvinhu zvavo zve epitaxial. Zvinhu zviripo zve phosphorus arsenic nitride series zvine kushanda kwakaderera kwazvo muyero-green spectrum range. Zvisinei, kushandisa zvinhu zvitsvuku kana zvebhuruu epitaxial kugadzira ma LED egirini kuchaita. Pasi pemamiriro ekudzikira kwehuwandu hwemagetsi, nekuti hapana kurasikirwa kwekushandurwa kwephosphor, LED yegirini ine simba guru rechiedza kupfuura bhuruu + phosphor green light. Zvinonzi kushanda kwayo kwechiedza kunosvika 291Lm/W pasi pemamiriro e1mA current. Zvisinei, kushanda kwechiedza chegirini kunokonzerwa neDroop effect kunoderera zvakanyanya pama currents makuru. Kana huwandu hwemagetsi hukawedzera, kushanda kwechiedza kunoderera nekukurumidza. Pa 350mA current, kushanda kwechiedza i108Lm/W. Pasi pemamiriro e1A, kushanda kwechiedza kunoderera kusvika 66Lm/W.

Kune ma phosphide eGroup III, kuburitsa chiedza mubhandi regirini kwave chipingamupinyi chikuru kune masisitimu ezvinhu. Kuchinja kuumbwa kweAlInGaP kuitira kuti ibudise girini pane kutsvuka, orenji kana yero kunoita kuti pave nekuvharirwa kwakakwana kwemutakuri nekuda kwekusakwana kwesimba remagetsi musisitimu yezvinhu, izvo zvinodzivisa kusanganiswa kwemwaranzi kunoshanda zvakanaka.

Kusiyana neizvi, zvakaoma kuti ma-III-nitrides awane kushanda kwepamusoro, asi matambudziko acho haagone kukundwa. Uchishandisa sisitimu iyi, kuwedzera chiedza kubhendi regirini, zvinhu zviviri zvinozokonzera kudzikira kwekushanda zvakanaka ndeizvi: kudzikira kwekushanda zvakanaka kwequantum yekunze uye kushanda zvakanaka kwemagetsi. Kudzikira kwekushanda zvakanaka kwequantum yekunze kunobva pakuti kunyangwe gap regirini rebhandi rakaderera, maLED egirini anoshandisa voltage yepamusoro yeGaN, izvo zvinoita kuti simba rekushandura riderere. Dambudziko rechipiri nderekuti LED yegirini inodzikira sezvo huwandu hwemagetsi einjection huchiwedzera uye hunobatwa ne droop effect. Droop effect inoitikawo muma LED ebhuruu, asi kushanda kwayo kwakanyanya muma LED egirini, zvichikonzera kudzikira kwekushanda zvakanaka kwemagetsi. Zvisinei, kune fungidziro dzakawanda nezvezvikonzero zve droop effect, kwete kungobatanidzwa kweAuger - zvinosanganisira dislocation, carrier overflow kana electron leakage. Izvi zvinowedzerwa ne high-voltage internal electric field.

Saka, nzira yekuvandudza kushanda zvakanaka kwechiedza chema LED egirini: kune rumwe rutivi, dzidza maitiro ekuderedza Droop effect pasi pemamiriro ezvinhu e epitaxial aripo kuti uvandudze kushanda zvakanaka kwechiedza; kune rumwe rutivi, shandisa photoluminescence conversion yebhuruu LEDs ne green phosphors kuti ubudise chiedza chegirini. Nzira iyi inogona kuwana chiedza chegirini chinoshanda zvakanyanya, icho mudzidziso chinogona kuwana kushanda kwakanaka kwechiedza kupfuura chiedza chena chiripo. Icho chiedza chegirini chisingangoerekana chaitika, uye kudzikira kwekuchena kwemavara kunokonzerwa nekuwedzera kwaro kwespectral hakuna kunaka kune madhiraivha, asi hachina kukodzera vanhuwo zvavo. Hapana dambudziko remwenje. Kushanda zvakanaka kwechiedza chegirini kunowanikwa nenzira iyi kune mukana wekuva kupfuura 340 Lm/W, asi hachizopfuuri 340 Lm/W mushure mekusanganiswa nechiedza chena. Chechitatu, ramba uchitsvagurudza uye uwane zvinhu zvako zve epitaxial. Nenzira iyi chete, pane tariro. Nekuwana chiedza chegirini chakakwirira kupfuura 340 Lm/w, chiedza chichena chinosanganiswa nema LED matatu makuru eruvara rutsvuku, girini nebhuruu chinogona kunge chakakwirira kupfuura muganho wekushanda zvakanaka we340 Lm/w wema LED machena erudzi rwechip-type. W.

3. LED yeUltravioletchip + phosphors nhatu dzemavara makuru dzinoburitsa chiedza.

Chikanganiso chikuru chemarudzi maviri ari pamusoro apa e LED chena ndechekusaenzana kwenzvimbo yekupenya uye chromaticity. Mwenje we ultraviolet haugone kuonekwa neziso remunhu. Saka, mushure mekunge mwenje we ultraviolet wabuda muchip, unotorwa ne phosphors nhatu dzemavara makuru dziri mupakeji, uye unoshandurwa kuita chiedza chichena ne photoluminescence ye phosphors, wobva waburitswa muchadenga. Iyi ndiyo mukana wayo mukuru, kungofanana nemwenje ye fluorescent yechinyakare, haina spatial color unequality. Zvisinei, kushanda kwechiedza che ultraviolet chip chena LED hakugone kuve kwakakwirira kupfuura kukosha kwetheory kwe blue chip chena light, tisingatauri kukosha kwetheory kwe RGB chena light. Zvisinei, kuburikidza nekugadzirwa kwe high-efficiency three-primary color phosphors dzakakodzera ultraviolet excitation ndipo patinogona kuwana ultraviolet white LEDs dziri pedyo kana kuti dzinoshanda kupfuura ma LED maviri machena ari pamusoro apa padanho rino. Kana ma LED e ultraviolet ari pedyo ne blue, mukana wekuti avepo ndewekuti avepo. Kana yakakura, ma LED machena e UV emhando ye medium-wave ne short-wave haagoneki.