Journal
CHEMISTRY OF MATERIALS
Volume 22, Issue 16, Pages 4776-4782Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm101314b
Keywords
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Funding
- FiDiPro
- Graduate School of Modern Optics and Photonics, Finland
- Nitto Denko Technical Corporation
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The synthesis, photophysical, and electrochemical characterization of macromolecules, consisting of an emissive platinum complex and carbazole moieties covalently attached to a polyhedral oligomeric silsesquioxane (PUSS) core, is reported. Organic light-emitting devices based on these PUSS materials exhibit a peak external quantum efficiency of ca. 8%, which is significantly higher than that of the analogous devices with a physical blend of the platinum complexes and a polymer matrix, and they represent noticeable improvement in the device efficiency of solution-processable phosphorescent excimer devices. Furthermore, the ratio of monomer and excimer/aggregate electroluminescent emission intensity, as well as the device efficiency, increases as the platinum complex moiety presence on the PUSS macromolecules decreases.
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