| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Dynamics of Förster Energy Transfer in Pyridium Salt-Doped Thin Films |
| XU Deng1, ZHUANG Xiao-Hong2 |
| 1Department of Electrical Engineering, Changzhou Institute of Mechatronic Technology, Changzhou 2131642Department of Humanities, Changzhou Institute of Mechatronic Technology, Changzhou 213164 |
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| Cite this article: |
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XU Deng, ZHUANG Xiao-Hong 2009 Chin. Phys. Lett. 26 077806 |
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Abstract Properties of photoluminescence and Förster energy transfer dynamics based on an organic pyridium salt trans-4-[p-(N-Hydroxyethyl-N-methylamino)Styryl]-N-methylpyridinium iodide (ASPI) and organic small molecule Alq3 in PMMA polymeric thin films are investigated by steady-state and time-resolved fluorescent spectra as well as theoretical calculation. The observation of reduced emission intensity and the fluorescent lifetime of Alq3 is demonstrated, while the ASPI emission gradually increases and is finally dominant in the PL spectra with increasing ASPI doping concentration. Such results show that there exists an efficient Förster energy transfer (FET) from Alq3 to ASPI due to the large spectral overlap between ASPI absorption and Alq3 emission. The difference between the theoretical FET efficiency and the experimental data is caused by the lower mobility of the Alq3 exciton in the MMA matrix.
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| Keywords:
78.66.-w
78.47.-p
42.70.-a
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Received: 08 April 2009
Published: 02 July 2009
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| PACS: |
78.66.-w
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(Optical properties of specific thin films)
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78.47.-p
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(Spectroscopy of solid state dynamics)
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42.70.-a
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(Optical materials)
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