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Organic light-emitting-diodes
Anne-Marie EngelerInkohärente Lichtquellen/ summer term 2016 / Prof. Dr. Jüstel
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Table of Contents
– History– Stucture of OLEDs– Different types– Matrixs– Advantages– Disadvantages/Problems– references
Anne-Marie Engeler OLED‘s 22.06.2016
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History
– the 1950s: Bernanose first observed EL in organic material
– 1960: Martin Pope and co-workers developedohmic dark-injecting electrode contacts to organic crystals
– 1965: W. Helfrich and W. G. Schneider produced double injection recombination electroluminescence
– the same year, Dow Chemical researchers patented a method of preparing electroluminescent cells
– Roger Partridge made the first observation of electroluminescence from polymer films (patented 1975 and published 1983)
– 1987: Ching W. Tang and Steven Van Slyke reported the first OLED device
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Stucture of OLEDs
Anne-Marie Engeler OLED‘s 22.06.2016
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Function
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Materialsfor PLEDS
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Materials for PLED
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……..
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Materials for SMOLED
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WOLEDS
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Matrices
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Advantages of OLEDs
Anne-Marie Engeler OLED‘s 22.06.2016
• Higher contrast – no backlight needed• Low weight and thickness• Better viewing angle possible- direkt emmitting• Faster response time• Lower energy
• Furture: lower prize because OLEDS can be printed
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Disadvantages / Problems
Anne-Marie Engeler OLED‘s 22.06.2016
• Expensive• Lifespan• Bad coulor banance, because of blue emmitters• Damaging by water and air• materials for flexible displays
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References
– Li, Zhigang R-Organic light-emitting materials and devices-CRC Press (2015)– Jan Kalinowski-Organic Light-Emitting Diodes_ Principles, Characteristics & Processes
(Optical Science and Engineering)-Marcel Dekker, (2005)– Hartmut Yersin-Highly Efficient OLEDs with Phosphorescent Materials-Wiley-VCH (2007)– Chizu Sekine, Yoshiaki Tsubata, Takeshi Yamada, Makoto Kitano and Shuji Doi, Recent
progress of high performance polymer OLED and OPV materials for organic printed electronics– Organische Leuchtdioden: Die Tapete als Heimkino? Borhaltige Nanographene leuchten in
allen Farben von Matthias Wagner und Valentin Hertzo http://aktuelles.uni-frankfurt.de/forschung/organische-leuchtdioden-die-tapete-als-heimkino/– Takatoshi Tsujimura, OLED Displays- Fundamentals and Applications– https://de.wikipedia.org/wiki/Organische_Leuchtdiode
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Organic light-emitting-diodes
Anne-Marie EngelerInkohärente Lichtquellen/ summer term 2016 / Prof. Dr. Jüstel