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Pure Appl. Chem., 2013, Vol. 85, No. 7, pp. 1427-1435

Published online 2013-04-25

Electric-field effects on photoinduced dynamics and function

Nobuhiro Ohta

Research Institute for Electronic Science, Hokkaido University, Sapporo 001-0020, Japan

Abstract: Photoinduced electron-transfer processes are enhanced or quenched by application of electric fields, depending on the donor–acceptor pairs. Electric-field-induced quenching of photoluminescence, which results from the field-induced dissociation of the exciton state that depends on the photoexcitation wavelength, is observed in π-conjugated polymers. These electric-field effects on photoinduced dynamics have been confirmed by the measurements both of electroabsorption and electrophotoluminescence spectra and of time-resolved electrophotoluminescence decays. Time-resolved measurements of photocurrent, with which novel material function in electrical conductivity of organic materials induced by photo-irradiation and application of electric fields is confirmed, are also reviewed.