Abstract

The photoinduced currents in a 0.5-μm thick PZT films have been measured as a function of wavelength and poling direction for films on a platinum base electrode and with either aluminum or gold semitransparent top electrodes. Photocurrents display an Urbachlike, exponential dependence on photon energy with additional features relating to interference effects within the film. Transport of the photoexcited carriers is dominated by traps, resulting in a small overall collection efficiency.

© 1989 Optical Society of America

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