Reflection and photoconduction spectra of the single crystals of perylene-TCNQ 1:1 and 3:1 molecular complexes.

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概要

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• Crystal absorption spectra of the two modifications of the perylene-TCNQ (7,7,8,8-tetracyanoquinodimethan) complex were derived from reflection spectra by the Kramers-Kronig transformation and are discussed in relation to the differences in the crystal structures. The spectral response of photoconduction does not show any efficient photocarrier generation in the lowest charge-transfer band region in either modification. However, the rise of the photocurrent of both modifications was found to obey an empirical equation, <I>Y</I><SUP>∝</SUP>(<I>E</I>–<I>E</I><SUB>th</SUB>)<SUP>2.5</SUP>, where <I>Y</I> is the quantum yield of the photocarrier generation, <I>E</I> is the photon energy, and <I>E</I><SUB>th</SUB> is the threshold energy. <I>E</I><SUB>th</SUB> of the two modifications is almost the same and falls in the energy region a little above the lowest charge-transfer band. Efficiencies of the carrier generation, on the other hand, are quite different for the two modifications. These photoelectrical characters are discussed in connection with the optical spectra and also with the data of photoelectron emission.

• 公益社団法人 日本化学会の論文

著者

• Inokuchi Hiroo

  Institute For Molecular Science

• Yakushi Kyuya

  Department Of Chemistry Faculty Of Science University Of Tokyo

• Ishii Kikujiro

  Department Of Chemistry Faculty Of Science Gakushuin University

• Kuroda Haruo

  Department of Chemistry and Research Center for Spectrochemistry, Faculty of Science, The University of Tokyo

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