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Issue 29, 2017
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Photoconductivity and magnetoconductance effects on vacuum vapor deposition films of weak charge-transfer complexes

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Abstract

Thin films of weak charge-transfer (CT) complexes (pyrene/dimethylpyromellitdiimide or pyrene/pyromellitic dianhydride) were prepared on an interdigitated platinum electrode by vacuum vapor deposition. Their photoconductivity and magnetoconductance (MC) effects were investigated, and mobile triplet excitons (probably CT excitons) were detected by time-resolved ESR (TRESR) at room temperature. The MC effect on the photocurrent was observed and analyzed by quantum-mechanical simulation assuming two types of collision mechanisms between the electron and hole carriers and between the trapped triplet excitons and mobile carriers. A successful simulation was achieved when the parameters (g, D, E, and polarization) determined by TRESR and the effective hyperfine splitting estimated from an ab initio molecular-orbital calculation were used.

Graphical abstract: Photoconductivity and magnetoconductance effects on vacuum vapor deposition films of weak charge-transfer complexes

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Article information


Submitted
28 Apr 2017
Accepted
12 Jun 2017
First published
12 Jun 2017

Phys. Chem. Chem. Phys., 2017,19, 18845-18853
Article type
Paper

Photoconductivity and magnetoconductance effects on vacuum vapor deposition films of weak charge-transfer complexes

K. Kato, S. Hagi, M. Hinoshita, E. Shikoh and Y. Teki, Phys. Chem. Chem. Phys., 2017, 19, 18845
DOI: 10.1039/C7CP02781H

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