1 / 36

Making light

Making light. Hans U. Güdel Department für Chemie und Biochemie Seminar Fribourg, 13.10.2009. Making light. Area illuminators. OLED Technology. Making light. Light White and coloured light Photoluminescence, phosphors Spectrum Light emitting diodes (LED) Outlook. Light.

Patman
Download Presentation

Making light

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Making light Hans U. Güdel Department für Chemie und Biochemie Seminar Fribourg, 13.10.2009

  2. Making light

  3. Area illuminators

  4. OLED Technology

  5. Making light • Light • White and coloured light • Photoluminescence, phosphors • Spectrum • Light emitting diodes (LED) • Outlook • Light

  6. Making light • Light

  7. Fiat Lux First Book Moses (Genesis), Chapter 1 1 in principio creavit Deus caelum et terram 2 terra autem erat inanis et vacua et tenebrae super faciem abyssi et spiritus Dei ferebatur super aquas 3 dixitque Deus fiat lux et facta est lux 4 et vidit Deus lucem quod esset bona et divisit lucem ac tenebras

  8. Black body radiation Temperature: Colour: 2500°C 5000°C 7500°C

  9. Black body radiation Temperature: Colour: 5000°C

  10. Human eye photoreceptors

  11. Incandescent lamp 2500°C

  12. Dispersion of white light

  13. Making light: Additive mixing

  14. Chromaticity Diagram

  15. Photoluminescence

  16. Kasha's Rule

  17. Light emitting semiconductor Light emission Conduction band – Bandgap + Valence band

  18. Photoluminescence of CdSe Nanoparticels

  19. Fluorescent lamp

  20. Luminescent phosphors

  21. Lamp and display phophors BaMgAl10O17: Eu2+ (Ce,Gd)MgB5O10: Tb3+ Y2O3: Eu3+ Judith Grimm

  22. The Lanthanides

  23. Coloured light

  24. LED based technology

  25. Light emitting diodes (LED) Conduction band – Electroluminescence Bandgap + Valence band

  26. LED Materials Inorganic Organic (OLED) III – V Semiconductors Polymeric luminescent molecules with conjugated electron systems Al, Ga, In N, P, As, Sb AlGaAs AlGaInP n AlGaP Polyphenylenvinylene GaN

  27. Light emitting polymer

  28. Mirco Colombo citations, 3 papers

  29. Diode spectra

  30. White diode lamp Diode Y3Al2(AlO4)3: Ce3+ – +

  31. Chromaticity Diagram

  32. Energy efficiency of light sources

  33. Technology steps Electronics Micro electronics Tube digital, solid analog Light sources Diode Solid Tube

  34. Area illuminators

  35. Acknowledgment Gabriela Frei

More Related