docÜbersicht der UV-Lampen und ihre Einsatzgebiete
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Übersicht der UV-Lampen und ihre Einsatzgebiete
Übersicht der UV-Lampen und ihre Einsatzgebiete Darmstadt, 15. Oktober 2009 Alex Voronov UV-Strahlertechnologie GOAL to give an overview for existing UV-lamps and their application areas Dr Voronov page 2 UV-Strahlertechnologie OUTLINE UV-Light UV-Light Sources based on Mercury Vapor Discharge Mercury free UV-Light Sources Application Areas Dr Voronov page 3 UV-Strahlertechnologie UV-Light Dr Voronov UV-A UV-B UV-C V-UV 315 – 380 nm 280 – 315 nm 200 – 280 nm 100 – 200 nm 3.3 – 4.0 eV 4.0 – 4.4 eV 4.4 – 6.2 eV 6.2 – 12.4 eV page 4 UV-Strahlertechnologie Photolysis of Organic Matter N–C λ < 397 nm C–S λ < 446 nm C11H26NO2PS P–S λ < 320 nm Decomposition Threshold Dr Voronov page 5 UV-Strahlertechnologie Dissociation of Organic Bonds by UV-Light Dr Voronov page 6 UV-Strahlertechnologie Application Fields of UV-Light UV-Light Water/Air Treatment, Disinfection Dr Voronov Surface Treatment, Modification Ink Curing in Printing Industry Tanning, Medicine page 7 UV-Strahlertechnologie UV-Light Sources Low Pressure Mercury Lamps Medium Pressure Mercury Lamps UV-Light Excimer Lamps Flash Lamps LED Dr Voronov page 8 Medium Pressure Lamps UV-Strahlertechnologie Medium Pressure Lamp Spectral Irradiance, W/m2 nm mHg~ 100 mg Pel ~10 kW 2.00 200-300 nm, η=15% 1.00 0.00 200 220 240 260 280 300 λ , nm Dr Voronov page 10 UV-Strahlertechnologie Spectrum of MP Lamp and DNA Absorption 2 Spectral Irradiance, W/m nm 2.0 DNA absorption 1.0 0.0 200 Medium Pressure Mercury Lamp 225 250 275 300 λ, nm Dr Voronov page 11 UV-Strahlertechnologie MP Lamps for Water Disinfection Dr Voronov page 12 UV-Strahlertechnologie MP Lamps – Spectra in UV-A and UV-B Regions Spectral Irradiance, W/m2 nm 4.00 UV-C UV-B UV-A 300 350 3.00 2.00 1.00 0.00 200 Dr Voronov 250 λ , nm 400 450 500 page 13 UV-Strahlertechnologie Absorption Spectra of Photoinitiators Medium Pressure Mercury Excimer 308 nm Dr Voronov page 14 UV-Strahlertechnologie Printing Industry Ink Curing in Printing Industry Medium Pressure: 280-400 nm Dr Voronov page 15 Low Pressure Lamps UV-Strahlertechnologie Low Pressure Lamp mHg ~ 10 µg Pel ~ 300 W Intensity, a.u. 1.00 254 nm, efficiency=35% 0.75 0.50 185 nm, efficiency=10% 0.25 0.00 150 175 200 225 250 275 300 λ, nm Dr Voronov page 17 UV-Strahlertechnologie Spectrum of Hg-Lamps and DNA Absorption Intensity, a.u. 1.00 absorption DNA 0.75 Low Pressure Mercury Lamp 0.50 0.25 0.00 200 225 250 275 300 λ, nm Dr Voronov page 19 UV-Strahlertechnologie DNA Destruction Dr Voronov page 20 UV-Strahlertechnologie Water Disinfection Low Pressure Lamp: 254 nm Dr Voronov page 21 UV-Strahlertechnologie Air Treatment - Kitchen Hoods Dr Voronov page 22 UV-Strahlertechnologie Air Treatment - Kitchen Hoods 185 nm Dr Voronov page 23 UV-Strahlertechnologie Molecular Structure of Fat Decomposition Threshold C–H λ < 293 nm C–O λ < 339 nm C=O λ < 162 nm Dr Voronov page 24 UV-Strahlertechnologie Bond Strength vs. Photon Energy 9 C=O 7 C=C 6 O-O 5 O-H C-H 3 2 1 0 150 Dr Voronov C-C C-O 254 nm 4 185 nm bond strength, eV 8 200 250 300 λ, nm 350 400 page 25 UV-Strahlertechnologie Xe2* Excimer Lamp (172 nm) Dr Voronov page 26 UV-Strahlertechnologie Excimer Molecule Xe Xe* Excited Dimer Life Time ~ ns Dr Voronov Seite 27 UV-Strahlertechnologie Excimer Molecule Xe2* E attraction 3 Xe Xe* * 2 Xe repulsion 1 r Σ u+ Σ +g Xe+ Xe internuclear distance, r Dr Voronov Seite 28 UV-Strahlertechnologie Emission at 172 nm * excimer Xe2 spectrum E 400 + u Σ 172 nm 300 int, a.u. 3 200 ∆λ1/2 = 20 nm 100 1 r Dr Voronov Σ + g 0 150 250 350 450 550 650 750 850 λ, nm Seite 29 UV-Strahlertechnologie LCD Cross Section Dr Voronov page 30 UV-Strahlertechnologie VUV-Light, λ=172 nm Removal of Cleaning Agents Surface Conditioning Polymer Removal Dr Voronov page 31 UV-Strahlertechnologie Quartz Destruction by Photons Dr Voronov Seite 32 UV-Strahlertechnologie Excimer Lamps: Mercury Free UV-Light Sources Dr Voronov page 33 UV-Strahlertechnologie Excimer Molecule Rare Gas + Halogen High Emission Efficiency Condition: Light Halogen + Heavy Rare Gas Atom Dr Voronov Seite 34 UV-Strahlertechnologie Excimer Molecule Rare Gas + Halogen Dr Voronov Seite 35 UV-Strahlertechnologie Excimer Spectra: Rare Gas + Halogen 207nm 222nm 248nm XeBr* KrCl* 253nm 282nm KrF* XeI* XeCl* XeF* 308nm 351nm Dr Voronov Seite 36 UV-Strahlertechnologie XeCl* (308 nm) for Treatment of Psoriasis Dr Voronov page 37 UV-Strahlertechnologie KrCl* (222 nm) for Surface Disinfection UV-absorption of H2O2 6 cross section, cm2 x10^ x10^-19 5 H2O2 + hν (222 nm) → 2 •OH 4 3 2 1 0 200 210 220 230 240 250 260 270 280 λ , nm Dr Voronov page 38 UV-Strahlertechnologie Barrier discharge lamp Cquartz Rdischarge Cquartz Dr Voronov Seite 39 UV-Strahlertechnologie Dielectric Barrier Discharge Dr Voronov page 40 UV-Strahlertechnologie Barrier Discharge: Operation Cquartz Uo Rdischarge Cquartz Dr Voronov page 41 UV-Strahlertechnologie Mesh Electrode of DBD Lamp Dr Voronov page 42 UV-Strahlertechnologie Spiral Electrodes of a DBD Lamp Dr Voronov page 43 UV-Strahlertechnologie Conclusions Dr Voronov page 44 UV-Strahlertechnologie Application Areas of UV-Lamp UV-Light Water/Air Treatment, Disinfection Dr Voronov Surface Treatment, Modification Ink Curing in Printing Industry Tanning, Medicine page 45 UV-Strahlertechnologie Thank You for Your Attention! Dr Voronov page 46