PCLT/P(VDF-TrFE) nanocomposite pyroelectric sensors

Author

Zhang, Qing-qi ; Chan, Helen Lai Wa ; Ploss, Bernd ; Choy, Chung Loong

Author_Institution

Dept. of Appl. Phys., Hong Kong Polytech. Univ., Kowloon, China

Volume

48

Issue

1

fYear

2001

Firstpage

154

Lastpage

160

Abstract

Thin composite films consisting of 12 vol% of nanosized lanthanum and calcium-modified lead titanate (PCLT) powder embedded in a vinylidene fluoride-trifluoroethylene copolymer [P(VDF-TrFE)] matrix were deposited on silicon (Si) substrates to form pyroelectric sensors with three different configurations. The influences of a thermal buffer layer and back etching of the silicon substrate on the current and voltage responsivities of the sensors were investigated theoretically and experimentally. The specific detectivity of the sensors was also calculated from the measured voltage responsivity and noise.

Keywords

etching; ferroelectric materials; filled polymers; lead compounds; nanostructured materials; polymer blends; polymer films; pyroelectric detectors; sol-gel processing; spin coating; P(VDF-TrFE)] matrix; PCLT/P(VDF-TrFE) nanocomposite; Si; Si substrate; back etching; current responsivity; ferroelectric copolymer; pyroelectric sensors; specific detectivity; thermal buffer layer; thin composite films; vinylidene fluoride-trifluoroethylene copolymer; voltage responsivity; Buffer layers; Etching; Lanthanum; Powders; Pyroelectricity; Semiconductor films; Silicon; Thin film sensors; Titanium compounds; Voltage;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.895925

Filename

895925