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

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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

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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

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• 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

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• 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

Anne-Marie Engeler OLED‘s 22.06.2016

Organic light-emitting-diodes

Anne-Marie EngelerInkohärente Lichtquellen/ summer term 2016 / Prof. Dr. Jüstel