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

Volume

34

Issue

11

fYear

2013

fDate

Nov. 2013

Firstpage

1427

Lastpage

1429

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;

fLanguage

English

Journal_Title

Electron Device Letters, IEEE

Publisher

ieee

ISSN

0741-3106

Type

jour

DOI

10.1109/LED.2013.2282393

Filename

6619454