Linear and Multi-Photon Fluorescence of Thiophene Based Copolymer with Electron-Accepting Side Chains
| Autor: | Eduard Jane, Vojtech Szöcs, Ludovit Haizer, Dusan Velic, Milan Drzik, Eva Noskovicova, Dusan Lorenc, Lenka Slusna, Dmitrij Bondarev |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Sociology and Political Science
Chemistry Clinical Biochemistry Quantum yield 02 engineering and technology Molar absorptivity 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Biochemistry Fluorescence Fluorescence spectroscopy 0104 chemical sciences Clinical Psychology chemistry.chemical_compound Excited state Thiophene Time-resolved spectroscopy 0210 nano-technology Absorption (electromagnetic radiation) Law Spectroscopy Social Sciences (miscellaneous) |
| Zdroj: | Journal of fluorescence. 28(6) |
| ISSN: | 1573-4994 |
| Popis: | A novel copolymer poly(thiophene-2,5-diyl-2,5-di-n-octyloxycarbonyl-1,4-phenylene), denoted as P33, is introduced as potential material for photovoltaics, polymer light-emitting diodes, and/or organic transistors. P33 dissolved in chloroform is investigated by steady-state absorption, linear/non-linear fluorescence spectroscopies and time-resolved fluorescence spectroscopy. Molar extinction coefficient, fluorescence quantum yield, and singlet fluorescence lifetime of P33 are determined to be 18,315 M−1 cm−1, 0.4, and 810 ps, respectively. The P33 fluorescence fast components of decay times are 1.2 ps, 2.0 ps, and 0.5 ps for increasing wavelengths of 480 nm, 500 nm, and 520 nm, respectively. The fast component is attributed to a transport of nearly instantaneously formed excitons to localized states known as downhill energy transfer. Additionally multi-photon excited fluorescence is observed for pumping with wavelengths of 800 nm and 1200 nm. Two-photon absorption cross-section is determined to be 6.9 GM. These spectroscopic studies provide basic fluorescence characteristics of the novel thiophene copolymer P33. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink