| Autor: |
Manoj K. Mitra, Debmallya Das, R. Singh, Jhimli Sarkar Manna |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings. |
| ISSN: |
0094-243X |
| DOI: |
10.1063/1.4810200 |
| Popis: |
Efficient electron transfer from chlorophyll-a (CHL-a) to TiO2 nanoparticle in polyaniline (PANI) grana like nanoporous matrix is evident from drastic decrease in CHL-a emission intensity in steady sate fluorescence and shorter fluorescence life time of CHL-a [which gradually decreases with TiO2 conc.] in composites. Delocalized polaronic peaks in UV-Vis spectra are only present in composites having all three counterparts. The absence of any overlap between the emission spectra of CHL-a (675 nm) and the absorption spectrum of TiO2 (365 nm), the well-established electron accepting nature of TiO2 (in presence of excited electron donors) coupled with the ΔGET value of −3.17ev reveal that the quenching mechanism in this work involves electron transfer [with 37.5% efficiency] and focuses its probable application in DSSC. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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