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Inkjet-Printed Small-Molecule Organic Light-Emitting Diodes: Halogen-Free Inks, Printing Optimization, and Large-Area
Lu Zhou1, Lei Yang1, Mengjie Yu1
1Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , 9 Wenyuan Road, Nanjing 210023, China.
ACS Applied Materials & Interfaces
|October 28, 2017
Summary
Inkjet printing enables efficient manufacturing of small-molecule organic light-emitting diodes (OLEDs). This study optimized inks and printing for high-performance, large-area blue OLEDs on flexible substrates.
Area of Science:
- Materials Science
- Organic Electronics
- Device Fabrication
Background:
- Inkjet printing offers a cost-effective method for fabricating organic light-emitting diodes (OLEDs).
- Achieving high-efficiency and long-lifetime OLEDs via inkjet printing remains a significant challenge.
- Optimization of ink properties and printing processes is crucial for successful device manufacturing.
Purpose of the Study:
- To systematically investigate and optimize ink properties and printing parameters for inkjet printing conjugated light-emitting small molecules.
- To develop facile inkjet printing methods for fabricating high-performance OLED devices.
- To demonstrate large-area patterning and efficient blue emission from inkjet-printed OLEDs on flexible substrates.
Main Methods:
- Systematic investigation of factors influencing inkjet-printed film quality, including droplet generation, ink spreading, and solidification.
- Development of halogen-free inks for inkjet printing of light-emitting small molecules.
- Optimization of the inkjet printing process for large-area patterning on flexible substrates.
Main Results:
- Optimized ink properties and printing processes led to improved film quality.
- Successfully demonstrated large-area inkjet printing of efficient blue-emitting small molecules on flexible substrates.
- Inkjet-printed OLEDs exhibited superior performance compared to spin-cast devices.
Conclusions:
- Inkjet printing is a viable and advantageous technique for manufacturing high-performance small-molecule OLEDs.
- The developed halogen-free inks and optimized printing process enable efficient, large-area fabrication of blue OLEDs.
- Inkjet printing offers a promising route for producing advanced OLED displays and lighting solutions.
