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Improving the efficiency of organic light-emitting diodes

NSF Award:

GOALI: CVD of Metal Oxides for Optoelectronic Applications  (University of Florida)

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Researchers at the University of Florida and Arkema Inc. have successfully grown thin films of materials used to control the charge transport in organic, light-emitting diodes (OLEDs). Such diodes are used in highly efficient lighting devices with excellent color definition, contrast and brightness. 

Chemical vapor deposition (CVD) using new precursor compounds resulted in growth of thin films (roughly 10 nanometers) of nanocrystalline tungsten oxide (WOX). The films' atomic composition, microstructure and electrical properties are appropriate for enhancement of carrier charge balance and recombination efficiency when used as an interfacial layer in OLEDs. The precursors will allow cost effective, scalable CVD growth of the OLEDs' WOX buffer layer.

Unlike traditional light-emitting diodes (LEDs), OLEDs are mechanically flexible, lightweight and quite thin, making them ideal for applications such as airplanes, where mechanical flexibility and minimal weight are needed. Additionally, different colors of lighting produced by different organic dye molecules make OLEDs suitable for an even larger lighting market than LEDs. Through this collaborative project, students have the opportunity to work in a team environment and learn outside their own discipline, as well as participate in internships at Arkema.

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  • advances in optoelectronic materials could mean more efficient lighting systems
Understanding the effects of different materials in an OLED could boost energy savings.
Richard Bonsu

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