Title :
An Ultraviolet (UV) Detector Using a Ferroelectric Thin Film With In-Plane Polarization
Author :
Gan, Bee Keen ; Yao, Kui ; Lai, Szu Cheng ; Chen, Yi Fan ; Goh, Phoi Chin
Author_Institution :
Inst. of Mater. Res. & Eng., Agency for Sci. Technol. & Res. (A*STAR), Singapore
Abstract :
Different from the semiconductor photovoltaic device on the basis of an interfacial effect, UV detection was realized in this letter by using bulk photovoltaic mechanism involving the depolarization field in a W-doped Pb0.97La0.03(Zr0.52Ti0.48)O3 (PLWZT) ferroelectric thin film. A prototype of UV detector was demonstrated in the laboratory as well as under sunlight, in which the ferroelectric PLWZT thin film was polarized in the plane of the film surface. Characteristics of the photovoltaic response of the ferroelectric thin films and their application values for UV detection were analyzed.
Keywords :
dielectric polarisation; ferroelectric devices; ferroelectric materials; ferroelectric thin films; lanthanum compounds; lead compounds; photodetectors; photovoltaic effects; tungsten; ultraviolet detectors; PLWZT thin film; PLZT:W; Pb0.97La0.03(Zr0.52Ti0.48)O3 ferroelectric thin film; UV detection; bulk photovoltaic mechanism; depolarization field; in-plane polarization; interfacial effect; ultraviolet detector; Detectors; Ferroelectric materials; Photovoltaic systems; Polarization; Prototypes; Semiconductor thin films; Solar power generation; Thin film devices; Transistors; Zirconium; Ferroelectric devices; photovoltaic effects; thin films; ultraviolet detectors;
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2008.2005254
