Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 9, Issue 10, Pages 3384-3390Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0tc05686c
Keywords
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Funding
- Guangdong Major Project of Basic and Applied Basic Research [2019B030302009]
- Science, Technology, and Innovation Commission of Shenzhen Municipality [JCYJ20170818141858021, JCYJ20200109150414471]
- National Natural Science Foundation of China [61774074]
- Hong Kong Quantum AI Lab Limited
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The WOLED with a simple device structure adopting double emitting layers achieves high efficiency, high luminance, and a decent color rendering index, making it a potential candidate for next-generation illumination devices.
A simple device structure adopting double emitting layers (EMLs) for white organic light-emitting diodes (WOLEDs) is described. The white emission is composed of blue emission from an Ir(III) complex in the blue EML and green/red emission from a single tetradentate Pt(II) complex Pt-X-4 in the green/red EML. High color rendering index (CRI) of 81 and high external quantum efficiencies of up to 19.85% are achieved for this WOLED. In addition to the broad emission spectrum and high efficiency, the short emission lifetime of Pt-X-4 in the aggregate form enables a high luminance of nearly 1 00 000 cd m(-2) and low efficiency roll-offs of 2.1% and 11% at 1000 and 10 000 cd m(-2), respectively. The simple device structure with high efficiency at high luminance and decent CRI value renders this WOLED a potential candidate for next-generation illumination devices.
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