N-heterocyclic carbazole-based hosts for simplified single-layer phosphorescent OLEDs with high efficiencies.
basic_science · Level V
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- Record sourced from PubMed, PMID 22553162.
- Also identified by DOI 10.1002/adma.201200927.
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Abstract
Highly efficient single-layer organic light-emitting diodes (OLEDs) are demonstrated using new N-heterocyclic carbazole-based host materials. Phosphorescent OLEDs with a structure of ITO/MoO(3) /host/host:dopant/host/Cs(2) CO(3) /Al are fabricated in which the new materials act simultaneously as electron-transport, hole-transport, and host layer. Devices with maximum current and external quantum efficiencies of 92.2 cd A(-1) and 26.8% are achieved, the highest reported to date for a single-layer OLED.
Medical subject headings
- Carbazoles