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Development of Efficient OLEDs from Solution Deposition
Published on: November 4, 2022
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Platinum and Gold Complexes for OLEDs.
Man-Chung Tang1, Alan Kwun-Wa Chan1, Mei-Yee Chan1
1Institute of Molecular Functional Materials (Areas of Excellence Scheme, University Grants Committee (Hong Kong)) and Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
Topics in Current Chemistry (Cham)
|August 31, 2016
Summary
Phosphorescent organic light-emitting devices (OLEDs) utilize d(8) platinum(II) and gold(III) complexes for high performance. These materials offer tunable emission colors and improved photophysical properties for advanced displays and lighting.
Area of Science:
- Materials Science
- Organic Electronics
- Photochemistry
Background:
- Organic light-emitting device (OLED) technology is a strong competitor to liquid crystal displays.
- Phosphorescent materials, especially transition metal complexes, are key to OLED success.
- d(8) transition metal complexes with square-planar structures exhibit unique luminescence properties.
Purpose of the Study:
- To summarize the development of d(8) platinum(II) and gold(III) complexes for phosphorescent OLEDs.
- To explore their application in fabricating high-performance OLEDs.
- To highlight the potential of these complexes in display and lighting technologies.
Main Methods:
- Review of d(8) platinum(II) and gold(III) complexes.
- Analysis of their spectroscopic and luminescence properties.
- Investigation of device engineering strategies for OLED fabrication.
Main Results:
- Fine-tuning of emission colors across the visible spectrum is achievable.
- External quantum efficiencies (EQEs) up to 30% for vacuum-deposited OLEDs.
- EQEs up to 10% for solution-processable OLEDs have been demonstrated.
- Modification of cyclometalated or pincer ligands enhances performance.
Conclusions:
- d(8) metal complexes are promising phosphorescent materials for OLEDs.
- These complexes offer opportunities for improved photophysical properties and color tuning.
- They hold significant potential for future display and solid-state lighting applications.
