Taw qhia rau UV Teeb Emitting Diodes
Ultraviolet lub teeb-emitting diodes xa mus rau lub teeb-emitting diodes (LEDs) uas emit ze-ultraviolet teeb nrog ib tug wavelength ntawm txog 400 nm. Lub teeb ultraviolet feem ntau yog siv los txheeb xyuas cov ntawv nyiaj cuav, thiab qee qhov UV LED teeb pom kev zoo yog nrov ntawm cov chaw ua haujlwm hmo ntuj thiab tog, qhov chaw uas lawv tau siv los ua cov tshuaj fluorescent ci ntsa iab.
Teeb pom kev zoo
Ultraviolet lub teeb-emitting diode yog hais txog lub teeb-emitting diode (led) uas emits ze-ultraviolet teeb. Nws lub teeb-emitting txoj cai yog tib yam li cov teeb pom kev zoo tib yam diodes. Lub hauv paus ntawm yuav ua li cas cov ntaub ntawv semiconductor tuaj yeem tsim teeb pom kev tau nkag siab 50 xyoo dhau los, nrog thawj cov khoom lag luam diodes uas tsim xyoo 1960. Led yog cov ntawv luv ntawm lus Askiv lub teeb emitting diode (lub teeb emitting diode). Nws cov qauv yooj yim yog ib qho ntawm cov khoom siv electroluminescent semiconductor, uas tau muab tso rau ntawm lub txee coj, thiab tom qab ntawd kaw nrog epoxy resin nyob ib puag ncig nws los tiv thaiv cov tub ntxhais hauv cov hlau, yog li LED muaj kev poob siab zoo. Lub hauv paus tseem ceeb ntawm lub teeb-emitting diode yog wafer tsim los ntawm p-type semiconductor thiab n-type semiconductor, thiab muaj txheej hloov pauv ntawm p-type semiconductor thiab n-type semiconductor, hu ua pn junction. Nyob rau hauv pn hlws ris ntawm qee cov khoom siv semiconductor, thaum cov neeg nqa khoom tsawg tsawg tau sib txuas nrog cov neeg nqa khoom feem ntau, lub zog ntau dhau raug tso tawm rau hauv daim ntawv ntawm lub teeb, yog li ncaj qha hloov hluav taws xob rau hauv lub teeb lub zog. Thaum qhov hluav taws xob rov qab siv rau pn kev sib tshuam, nws nyuaj rau cov neeg nqa khoom tsawg los txhaj, yog li nws tsis tawm lub teeb. Hom diode no ua los ntawm lub hauv paus ntsiab lus ntawm kev txhaj tshuaj electroluminescence yog hu ua lub teeb emitting diode, feem ntau hu ua coj. Thaum nws nyob rau hauv lub xeev ua hauj lwm pem hauv ntej (uas yog, ib tug pem hauv ntej voltage yog siv rau ob hnub), thaum lub tam sim no ntws los ntawm LED anode mus rau cathode, lub semiconductor siv lead ua emits lub teeb ntawm txawv xim los ntawm ultraviolet mus rau infrared, thiab siv. ntawm lub teeb muaj feem xyuam nrog rau tam sim no.
Technical nta
1) 3535 SMD LED violet lub teeb txais lub iav encapsulation thiab npib tsib xee-plated alloy plhaub, uas ntxiv txhim kho lub luminous efficiency ntawm violet lub teeb, txo qhov attenuation ntawm violet lub teeb, thiab prolongs lub neej kev pab cuam. 2) Ob lub pins yog kub-plated. 3) High luminous siv. 4) Qhov zoo yog ruaj khov thiab txhim khu kev qha.
Lub teeb qhov chaw wavelength
1. Ntshav: 405nm - ntshiab ntshav 400nm - ntshav liab 2. ze-ultraviolet lub teeb 395nm - reddish sib sib zog nqus ntshav uv-ib hom ultraviolet lub teeb 3, 370nm - yuav luag pom tsis pom lub teeb, qhia cov xim tsaus nti thaum lim los ntawm cov iav ntoo tob ntshav. 4. Ultraviolet light (uv) sterilization teeb λρ{14}}nm lossis 253.7nm, point light source λρ{17}}nm, ozone tsim hauv qab λρ{18}}nm-- nqus ultraviolet (uv -v), wavelength 100-200nm -- short-wave ultraviolet (uv-c)), lub wavelength yog 200-280nm -- the medium wave ultraviolet (uv-b) wavelength yog 280-315nm -- lub wavelength ntev ultraviolet (uv-a), lub wavelength yog 315-380nm -- pom lub teeb (pom teeb), lub wavelength yog 400-760 nm
Kev txhim kho rooj plaub
Cov kws tshawb fawb Asmeskas tau ua tiav cov teeb pom kev zoo ultraviolet-emitting diodes (leds) nrog lub wavelength ntawm 255nm thiab lub zog ntawm 0.57w thiab wavelength ntawm 250nm thiab lub zog ntawm 0. 16 wb. Cov cuab yeej tseem tsis tau ntim, thiab pab pawg vam tias yuav nce qib zog los ntawm qhov zoo ntawm 3 mus rau 5 los ntawm kev sib txuas ntawm flip-chip. Qhov tob tob ultraviolet (uduv) lub teeb qhov chaw nyob rau hauv lub band no yuav hloov mercury qhov muag teev nyob rau hauv lub neej yav tom ntej raws li lub excitation teeb qhov chaw rau lom thiab tshuaj sensors. Asif Khan et al. ntawm University of South Carolina tau loj hlob zoo algan txheej uas muaj txog li 72 feem pua ntawm txhuas thiab siv lawv li cladding nyob rau hauv lub teeb-emitting diode qauv los fabricate uduv Cheebtsam. Siv sapphire raws li LED substrate, cov kws tshawb fawb tau tso ib txheej aln tsis raws li thawj txheej, ua raws li kaum-txheej aln / algan superlattice, ua raws li 1.4-micron-thick al{{2{{34} }}}}.72ga0.28n batch cladding. Pab neeg no tau hais tias txheej txheej algan nrog cov ntsiab lus txhuas ntawm 72 feem pua raug xaiv los ua cov khoom tseem pob tshab ntawm lub wavelength ntawm 250 nm, thiab txheej txheej no yog tus yuam sij rau kev txiav txim siab kev ua tau zoo ntawm cov khoom. Cov cheeb tsam nquag muaj peb lub qhov dej quantum, thiab cov emission wavelength tuaj yeem hloov kho ntawm 250 thiab 200 nm los ntawm kev hloov cov ntsiab lus txhuas. Cov kws tshawb fawb tau sim ib qho 200-square-micron module nrog lub wavelength ntawm 255nm thiab ib tug 150-square-micron module nrog ib tug wavelength ntawm 250nm nyob rau hauv lub pulsed biased tej yam kev mob. Cov excitation tam sim no sib xws rau lub siab tshaj plaws tso zis zog ntawm ob yog 200ma thiab 300ma, feem. , qhov kev ua tau zoo ntawm quantum sab nraud ntawm emitter yog 0.015 feem pua thiab 0.01 feem pua.
Daim ntawv thov teb
UV lub teeb-emitting diodes yog dav siv nyob rau hauv: hlau tawg, tawg nrhiav kom tau, photocatalyst lub teeb qhov chaw, txiaj nrhiav thiab suav cov cuab yeej, kev lag luam tiv thaiv kev lag luam, thiab kev ntsuas kev kho mob thiab biometric kev ruaj ntseg nrhiav kom tau, hydraulic leak detection thiab lwm yam teb.
Kev cia siab
High-power tob-ultraviolet lub teeb-emitting diodes nrog wavelengths ntawm 220nm thiab 350nm yog dav siv nyob rau hauv sterilization, dej purification, kev kho mob, high-density optical kaw, high-xim rendering LED teeb pom kev zoo, thiab high-speed decomposition thiab kho cov pa phem tshuaj. Txog tam sim no, UV lasers thiab roj teeb nrog cov roj thiab cov khoom siv tshaj tawm xws li excimer lasers thiab ntau zaus-doubling lasers yog lub ntsiab ntawm cov teeb pom kev sib sib zog nqus ultraviolet, tab sis lawv muaj qhov tsis zoo ntawm qhov loj me, lub neej luv luv thiab tus nqi siab, uas yog. nyuaj rau xyaum siv. Kev siv cov semiconductor high-brightness sib sib zog nqus-ultraviolet LEDs thiab tob-ultraviolet lds tuaj yeem ua tiav miniaturization thiab tau txais qhov pheej yig, txuag hluav taws xob thiab lub neej ntev ultraviolet lub teeb, thiab daim ntawv thov kev cia siab yog dav dua.
