Dielectrics

Influence of an electric field on photostimulated states in NH$_4$BPh$_4$ films

O. V. Antonova, V. A. Nadolinnyi, E. A. Il'inchik, S. V. Trubina

Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk

Abstract: The influence of an electric field on stable photostimulated triplet states of NH$_4$BPh$_4$ at a temperature of 77 K have been studied by EPR spectroscopy. It has been established that, on exposure to UV radiation, electron capture by traps in the band gaps takes place with formation of triplet state. After application of an electric field, triplet states are destructed because, with an increase in the applied voltage, a gradual inclination of energy bands takes place and electrons found in traps on different energy levels are released. The assumption that captured electrons are found in traps on different energy levels is confirmed by earlier studies of thermoluminescence spectra.

Received: 28.03.2012

 English version: Physics of the Solid State, 2012, 54:10, 1970–1974

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