ELECTRICAL PROPERTIES OF ORGANIC SOLIDS. I. KINETICS AND MECHANISMOF CONDUCTIVITY OF METAL-FREE PHTHALOCYANINE

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Techniques involving the use of high-intensity short-duration light pulses have been applied t o the study of the kinetics of photoconductivity in films of metal-free phthalocyanine. These experiments, in conjunction with measurements of steady-state photoconductivity, are consistent with the following scheme. The principal route for the formation of charge carriers is via the first excited singlet state, although the lowest triplet state can, t o some extent, contribute to charge - carrier production. The mobility of the carriers is low and is concentration-dependent, being lower at higher carrier concentration. The decay of the photocurrent is the result of a diffusion-limited ... continued below

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21 p.

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Tollin, Gordon; Kearns, David R. & Calvin, Melvin. July 29, 1959.

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Description

Techniques involving the use of high-intensity short-duration light pulses have been applied t o the study of the kinetics of photoconductivity in films of metal-free phthalocyanine. These experiments, in conjunction with measurements of steady-state photoconductivity, are consistent with the following scheme. The principal route for the formation of charge carriers is via the first excited singlet state, although the lowest triplet state can, t o some extent, contribute to charge - carrier production. The mobility of the carriers is low and is concentration-dependent, being lower at higher carrier concentration. The decay of the photocurrent is the result of a diffusion-limited bimolecular recombination, with a capture radius of approximately one molecular diameter. The experiments indicate that carriers produced thermally in the dark do not interact with light-produced carriers.

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21 p.

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  • Report No.: UCRL--8843
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.2172/919683 | External Link
  • Office of Scientific & Technical Information Report Number: 919683
  • Archival Resource Key: ark:/67531/metadc896456

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  • July 29, 1959

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 3, 2016, 8:10 p.m.

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Tollin, Gordon; Kearns, David R. & Calvin, Melvin. ELECTRICAL PROPERTIES OF ORGANIC SOLIDS. I. KINETICS AND MECHANISMOF CONDUCTIVITY OF METAL-FREE PHTHALOCYANINE, report, July 29, 1959; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc896456/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.