Title :
A Photovoltaic UV Sensor With a Ferroelectric Thin Film on Transparent Substrate
Author :
Szu Cheng Lai ; Kui Yao ; Yi Fan Chen ; Lei Zhang ; Yee-Fun Lim
Author_Institution :
Inst. of Mater. Res. & Eng., Agency for Sci., Technol. & Res., Singapore, Singapore
Abstract :
A photovoltaic ultraviolet (UV) sensor is designed with a unique structure comprising of an in-plane polarized ferroelectric lead lanthanum zirconate titanate (PLZT) thin film on a transparent silica substrate and with an interdigital electrodes on the top surface. Both the experimental measurements and theoretical analyses showed that the UV sensor exhibited significantly enhanced responses with the incident UV irradiation input from the silica substrate in comparison with that from the top surface of the PLZT film. The proposed device configuration leads to a cost-effective scratch- and moisture-proof UV sensor with a flip-chip package, which promises great robustness for UV monitoring in harsh conditions.
Keywords :
ferroelectric thin films; lead compounds; ultraviolet detectors; PLZT; SiO2; flip-chip package; in-plane polarized ferroelectric lead lanthanum zirconate titanate thin film; incident UV irradiation; interdigital electrodes; photovoltaic ultraviolet sensor; transparent silica substrate; Electrodes; Optical polarization; Photovoltaic systems; Radiation effects; Silicon compounds; Substrates; Ferroelectrics; photovoltaic; polarized ferroelectric lead lanthanum zirconate titanate (PLZT) thin film; transparent substrate; ultraviolet (UV) sensor;
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2013.2282393
