期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 112, 期 37, 页码 11605-11609出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp8044143
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资金
- Fondazione Cariplo
- Spanish Ministry of Science and Education
- BIMORE [EU-FP6-Marie Curie-035859]
- OLAS [EU-FP6-IST-FET -015034]
- Italian MIUR [FIRB RBNE033KMA, FIRB RBIP0642YL]
We report on the triplet spectra and dynamics in two types of oligomeric films deposited by two different techniques: thermal evaporation and spin coating. The different molecular arrangement in both films is manifested in a red shift of the absorption, PL, and T-1-T-n absorption spectra of the sublimated film relative to the spin-coated one. Triplet recombination dynamics studied with steady-state photoinduced absorption (PA) spectroscopy follow a dispersive bimolecular recombination model away from the trap filling regime. We obtained values for the triplet bimolecular recombination ratio (beta) of 3.4 x 10(-14) and 1.1 x 10(-15) cm(3) s(-1) for evaporated and spin-coated film, respectively, the difference being attributed to diverse molecular arrangement in both films.
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