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Project 4

Project 4: Efficient and bright light-emitting diodes on single-layer graphene electrodes

Organic light-emitting diodes (OLEDs) are emerging as leading technologies for both high quality display and lighting. OLEDs consist of active organic luminescent structure sandwiched between two electrodes, one of which must be transparent. Currently, indium tin oxide (ITO) is the most widely used material for the transparent conductors (TCs) electrodes. However, the rising price and limited geographical availability of Indium, asks for alternative transparent conductors (TCs) for the next generation of OLED devices. The next generation of optoelectronic devices requires transparent conductive electrodes to be lightweight, flexible, cheap, environmentally attractive, and compatible with large-scale manufacturing methods. Graphene could be ideal for replacing transparent electrodes made of expensive indium tin ITO in OLEDs. However, even the best graphene anode OLEDs made today are incapable of emitting light very efficiently because graphene has a low work function and high sheet resistance. This research proposal is to overcome these problems through two approaches. The first approach is to use a metal oxide film (for example, molybdenum trioxide, MoO3) as an intermediate layer between the graphene and the OLED layers. The second approach is by modifying the surface of the graphene using water-dispersed conducting polymer and a perfluorinated ionomer. We expected the results of this propose research able to confirm that graphene electrodes could be used to make a high-performance and flexible OLED devices.

 

Prof. Dr. Muhamad Bin Mat Salleh
Institute of Microengineering and Nanoelectronics (IMEN),
Level 4, Research Complex,
Universiti Kebangsaan Malaysia,
43600 Bangi, Selangor

Physics

Objectives

 Expected Outcome

Researcher

  
Assoc. Prof. Dr. Akrajas Ali Umar
IMEN, UKM
 Assoc. Prof. Dr. Mohd. Yusri Abd Rahman
IMEN, UKM
 Assoc. Prof. Dr. Dee Chang Fu
IMEN, UKM
   
Dr. Yap Chi Chin 
FST, UKM
 

Prof. Emeritus Dato’ Dr. Muhammad Yahaya
IMEN, UKM