Synthesis and characterization of methoxy- or cyano-substituted thiophene/phenylene co-oligomers for lasing application
Autor: | Jasmin Martha Herr, Takumi Matsuo, Richard Göttlich, Derck Schlettwein, Carina Rössiger, Hitoshi Mizuno, Fumio Sasaki, Hisao Yanagi |
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Rok vydání: | 2020 |
Předmět: |
010302 applied physics
Amplified spontaneous emission Materials science General Chemical Engineering 02 engineering and technology General Chemistry Triclinic crystal system 021001 nanoscience & nanotechnology 01 natural sciences Crystal chemistry.chemical_compound Crystallography chemistry Phenylene 0103 physical sciences Thiophene Orthorhombic crystal system 0210 nano-technology Lasing threshold Monoclinic crystal system |
Zdroj: | RSC advances. 10(40) |
ISSN: | 2046-2069 |
Popis: | As new candidates of thiophene/phenylene co-oligomer (TPCO) species, 5,5′′-bis(4′-methoxy-[1,1′-biphenyl]-4-yl)-2,2′:5′,2′′-terthiophene (BP3T-OMe) and 4′,4′′′-([2,2′:5′,2′′-terthiophene]-5,5′′-diyl)bis(([1,1′-biphenyl]-4-carbonitrile)) (BP3T-CN) were synthesized for lasing applications. Although most unsubstituted TPCO species crystallize in monoclinic form, BP3T-OMe and BP3T-CN crystallized in orthorhombic and triclinic forms, respectively. Since the unsubstituted species, 5,5′′-bis(4-biphenylyl)-2,2′:5′,2′′-terthiophene (BP3T), shows unique and superior lasing performance in single crystals, the newly synthesized BP3T-OMe and BP3T-CN have possibilities to show different or improved optoelectronic characteristics. Amplified spontaneous emission (ASE) and optically pumped lasing were observed from both of the single crystals based on their well-shaped crystalline cavity and high group refractive index values of 3.7–5.3 for excellent light confinement. The lasing threshold for the BP3T-OMe crystal was lower than that for the BP3T-CN crystal, which was attributed to their different molecular orientation, standing in the former and inclining in the latter. |
Databáze: | OpenAIRE |
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