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Manipulating the Local Light Emission in Organic Light-Emitting Diodes by using Patterned Self-Assembled Monolayers
Simon G J Mathijssen1, Paul A van Hal, Ton J M van den Biggelaar
1Eindhoven University of Technology Department of Applied Physics P.O. Box 513 5600 MB Eindhoven (The Netherlands); Philips Research Laboratories High Tech Campus 4 5656 AE Eindhoven (The Netherlands). s.g.j.mathijssen@tue.nl.
Advanced Materials (Deerfield Beach, Fla.)
|September 13, 2014
Summary
Researchers fabricated patterned organic light-emitting diodes using microcontact printing. This method precisely controls charge injection and light emission by modifying the gold anode
Area of Science:
- Materials Science
- Organic Electronics
- Surface Chemistry
Background:
- Organic light-emitting diodes (OLEDs) are crucial for displays and lighting.
- Controlling charge injection is key to optimizing OLED performance.
- Work function modification of anodes influences charge injection efficiency.
Purpose of the Study:
- To develop a method for fabricating patterned organic light-emitting diodes.
- To investigate the effect of surface modification on charge injection.
- To enable local control over light emission in OLEDs.
Main Methods:
- Fabrication of patterned OLEDs using microcontact-printed self-assembled monolayers.
- Utilizing molecules with opposing dipole moments on a gold anode.
- Measuring local work function changes.
Main Results:
- Successfully patterned OLEDs were fabricated.
- Local work function of the gold anode was increased or decreased by molecular dipoles.
- Demonstrated a direct correlation between work function modification and charge injection.
Conclusions:
- Microcontact printing of self-assembled monolayers offers precise control over OLED fabrication.
- Local work function modulation is an effective strategy for tuning charge injection.
- This technique enables localized control of light emission in organic devices.
