Abstract
Personal UV dosimeters for consumer applications are needed for checking and determination of admissible UV dose of radiation. In this work, an ultraviolet (UV) sensor based on ferroelectric–semiconductor thin film structures for a portable pocket UV dosimeter is presented. The UV radiation is absorbed by a semiconductor. Thus, photocarriers are generated which are stored at the semiconductor–ferroelectric interface. Periodical measurements of the frozen impedance allow to determine the absorbed dose of UV radiation. The ferroelectric polarization permits a continuous operation without a power source. After usage, the UV sensor is reset by polarization switching of the ferroelectric. Sensor design rules are discussed and first sensor prototypes are presented.
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