Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 5, Issue 7, Pages 1516-1531Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.200900727
Keywords
chromophores; fluorescence; materials science; molecular electronics; photophysics
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
- General Sekiyu Research and Development Encouragement and Assistance Foundation
- Iketani Science and Technology Foundation
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There has been extensive research on the development of organic optoelectronic devices, such as organic light-emitting diodes, organic field-effect transistors, and organic solid-state lasers from various viewpoints, ranging from basic studies to practical applications. As organic materials are used as solids in these devices, the importance of organic chromophores that exhibit intense emissions of visible light in the solid state is greatly increasing in the field of organic electronics. However, highly efficient emission from organic solids is very difficult to attain because most organic emitting materials strongly tend to cause concentration quenching of the luminescence in the condensed phase. Therefore, in order to generate and improve organic optoelectronic devices, it is necessary to design novel chromophores that exhibit superior solid-state emission performance. This Focus Review covers the recent development of highly emissive organic small molecules whose photoluminescence quantum yields in the solid state have been reported. Following the introduction, the photophysical processes of excited molecules are briefly reviewed. Subsequently, organic solid fluorophores are described with an emphasis on the characteristics of their molecular structures.
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