Pulsed photoconductivity of chlorophyll a

H. Kassi, S. Hotchandani, R. M. Leblanc, N. Beaudoin, M. Dery

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

Pulsed photoconduction study of Al/Chlorophyll a/Al sandwich cells has been carried out in order to investigate the charge transport in chlorophyll a (Chl a). The charge carriers are generated close to the electrode by laser pulse (800 ps) of strongly absorbed wavelength 750 nm by Chl a. The results suggest that the trapping of photogenerated charge carriers is quite significant. The electron transient current is practically absent, and the hole current signal rapidly decreases due to deep trapping. The signal shows a biexponential behavior in time period of approximately 50 μs which could be related to the presence of two trapping species. In millisecond time range, the hole current shows a long tail in addition to the fast component. The analysis of the long tail seems to suggest the dispersive hole transport phenomenon in microcrystalline Chl a.

Original languageEnglish (US)
Pages (from-to)58-67
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume1436
StatePublished - Jan 1 1991
Externally publishedYes
EventPhotochemistry and Photoelectrochemistry of Organic and Inorganic Molecular Thin Films - Los Angeles, CA, USA
Duration: Jan 23 1991Jan 24 1991

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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