Transient photocurrent in molecular junctions

Singlet switching on and triplet blocking

E. G. Petrov, V. O. Leonov, Vladislav Snitsarev

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)

Abstract

The kinetic approach adapted to describe charge transmission in molecular junctions, is used for the analysis of the photocurrent under conditions of moderate light intensity of the photochromic molecule. In the framework of the HOMO-LUMO model for the single electron molecular states, the analytic expressions describing the temporary behavior of the transient and steady state sequential (hopping) as well as direct (tunnel) current components have been derived. The conditions at which the current components achieve their maximal values are indicated. It is shown that if the rates of charge transmission in the unbiased molecular diode are much lower than the intramolecular singlet-singlet excitation/de-excitation rate, and the threefold degenerated triplet excited state of the molecule behaves like a trap blocking the charge transmission, a possibility of a large peak-like transient switch-on photocurrent arises.

Original languageEnglish
Article number184709
JournalJournal of Chemical Physics
Volume138
Issue number18
DOIs
StatePublished - 14 May 2013

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Photocurrents
photocurrents
excitation
Molecules
Excited states
luminous intensity
tunnels
molecules
Tunnels
Diodes
switches
diodes
Switches
traps
Kinetics
Electrons
kinetics
electrons

Cite this

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Transient photocurrent in molecular junctions : Singlet switching on and triplet blocking. / Petrov, E. G.; Leonov, V. O.; Snitsarev, Vladislav.

In: Journal of Chemical Physics, Vol. 138, No. 18, 184709, 14.05.2013.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Transient photocurrent in molecular junctions

T2 - Singlet switching on and triplet blocking

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AU - Leonov, V. O.

AU - Snitsarev, Vladislav

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