Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 33, Pages 16810-16816Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm33526c
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Funding
- JST [10111]
- Japan Society for the Promotion of Science (JSPS) [23750218]
- Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST)
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
- Inamori Foundation
- Hattori-Hokokai Foundation
- Sumitomo Foundation
- Grants-in-Aid for Scientific Research [23750218] Funding Source: KAKEN
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We have disclosed the photophysical and electroluminescent properties of a series of hetero-annulated pi-conjugated dithieno[3,2-b:2',3'-d]metallole derivatives incorporating Ge, Si, P, and S atoms as a bridging center. The influence of the hetero-annulated structures on their photophysical properties has been investigated systematically by UV/vis and photoluminescence (PL) spectroscopy, transient PL measurements, and DFT calculations. All these compounds show bright fluorescence with high quantum yields both in solutions and in doped thin films with a host matrix. Furthermore, the OLEDs employing the dithienometallole emitters exhibit high external quantum efficiencies of similar to 6% at a practical brightness.
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