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Journal of the Electrochemical Society, Vol.159, No.6, J205-J208, 2012
Enhancement of the Photo-Response Properties of the Flexible CdS Films by an Application of Electrical Field
Photo-response switching of the CdS films grown at an optimum condition for the photo-sensor applications was investigated by an application of the electrical field. Recovery to the original dark-resistance after a light-off was achieved for 60 s by an application of the electrical field (similar to 30 V) in the two electrodes structure. On the other hand, in the structure of three electrodes, after application of -10 V for microsecond at third electrode at a light-off state, the dark-resistance was recovered to its original value for three second. An application of the negative electrical field in the three electrodes structure remarkably improved the switching characteristics of the photo-response of the CdS films.