Optical and electrical measurement of energy transfer between nanocrystalline quantum dots and photosystem I

Hyeson Jung, Galina Gulis, Subhadra Gupta, Kevin Redding, David J. Gosztola, Gary P. Wiederrecht, Michael A. Stroscio, Mitra Dutta

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Abstract

In the natural photosynthesis process, light harvesting complexes (LHCs) absorb light and pass excitation energy to photosystem I (PSI) and photosystem II (PSII). In this study, we have used nanocrystalline quantum dots (NQDs) as an artificial LHC by integrating them with PSI to extend their spectral range. We have performed photoluminescence (PL) and ultrafast time-resolved absorption measurements to investigate this process. Our PL experiments showed that emission from the NQDs is quenched, and the fluorescence from PSI is enhanced. Transient absorption and bleaching results can be explained by fluorescence resonance energy transfer (FRET) from the NQDs to the PSI. This nonradiative energy transfer occurs in ∼6 ps. Current - voltage (I-V) measurements on the composite NQD-PSI samples demonstrate a clear photoresponse.

Original languageEnglish
Pages (from-to)14544-14549
Number of pages6
JournalJournal of Physical Chemistry B
Volume114
Issue number45
DOIs
Publication statusPublished - Dec 8 2010

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ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Jung, H., Gulis, G., Gupta, S., Redding, K., Gosztola, D. J., Wiederrecht, G. P., Stroscio, M. A., & Dutta, M. (2010). Optical and electrical measurement of energy transfer between nanocrystalline quantum dots and photosystem I. Journal of Physical Chemistry B, 114(45), 14544-14549. https://doi.org/10.1021/jp102291e