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Seminar Title - doping concentrations up to 15 Also new...

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Daniel Black Seminar Date: April 1, 2011 Title: Attacking Problems with Organic Light-Emitting Diodes (OLEDS) Abstract: Organic light-emitting diodes (OLEDS) have many advantages over conventional devices, such as contrast and brightness, fast response times, low weight, and low power consumption. OLEDs also have the potential to be fabricated on large area substrates and have a wide range of color choices. Even with these advantages, problems with OLEDs still exist, such as the fact that they lack stability of organic light emitting material and high efficiency on both rigid and flexible materials. Newly synthesized organic light emitting molecules hope to increase stability of OLEDs such as those based on diphenylaminofluorenylstyrene emitting core groups. The most notable of these new emitting materials is 9-[4-(2-diphenylamino-9,9-diethylfluoren-7-ylethenyl)phenyl]-9-phenylfluorene which has been reported to have no change in the CIE (Commission Internationale d'Eclairage) coordinates (x= 0.15, y= 0.13) for
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Unformatted text preview: doping concentrations up to 15%. Also new devices that use new host material such as indium-free transparent conducting oxides have been reported to increase efficiency of OLED devices. New techniques are also being developed to apply these OLEDs to flexible substrates using inkjet printers and thin film transistor arrays. These flexible substrates must have properties similar to glass, such as a smooth surface, transparency , thermal stability, solvent resistance, and low coefficient of thermal expansion (CLTE). The issues are not only being worked out in the area of academia but also by companies such as Eastman Kodak, Dow Chemical, DuPont, and Universal Display Technology. In order to move past these drawbacks, new and different approaches and solutions transcending disciplines in science and engineering will be required....
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This note was uploaded on 03/27/2011 for the course CHEM 2211L taught by Professor T.a. during the Spring '08 term at UGA.

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