Ferroelectric-Semiconductor UV Sensors

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 ferroelectricsemiconductor 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.

Recent Advances in Ferroelectric Nanosensors: Toward Sensitive Detection of Gas, Mechanothermal Signals, and Radiation

“…Thin films of many different ferroelectric materials (Pb 0.97 La 0.03 (Zr 0.52 Ti 0.48 )O 3 (PLZT) [92,93], PZT [94,95], and Bi 4 Ti 3 O 12 [96]) were employed in ultraviolet (UV) sensors. Lai et al designed and tested a photovoltaic ultraviolet (UV) detector with a unique structure [92].…”

Innovative UV sensor based on highly birefringent fiber covered by graphene oxide

“…One example is UV detection with nanowires based on monitoring the current-voltage or electrical conductance variation when exposed to UV radiation [1]. An ultraviolet sensor based on ferroelectricsemiconductor thin film structures is proposed in [2]. A wireless UV sensor based on the photocapacitive effect in GaN (upon illumination of oscillator with ultraviolet light the oscillator frequency decreases due to the photocapacitive effect) is reported in [3].…”