Pyroelectric properties of sol-gel derived (Pb,Mg)TiO3 thin film detectors

被引：0
|
作者：
Chen, YC [1 ]
Wang, CM [1 ]
Kao, MC [1 ]
Lai, YH [1 ]
机构：
[1] Natl Sun Yat Sen Univ, Dept Elect Engn, Kaohsiung 804, Taiwan
来源：
SMART MATERIALS | 2001年 / 4234卷
关键词：
sol-gel; PMT; pyroelectric; IR detector; voltage responsivity; specific detectivity;
D O I：
10.1117/12.424422
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
High-performance pyroelectric infrared (IR) detectors have been fabricated without the back side etching process using Mg-modified lead titanate (Pb1-xMgxTiO3) thin films. PMT thin films were deposited on (111)-oriented Pt thin film on SiO2/Si(100) substrates by a diol-based sol-gel process. The randomly oriented PMT thin film exhibits a relatively small dielectric constant and a large pyroelectric coefficient without poling treatment. The pyroelectric characteristics of point detectors with various Mg contents as a function of modulation frequency are compared. It was found that the PMT(6) thin film detector has a large voltage responsivity of 5280 (V/W) at 20 Hz. The specific detectivity (D*) at 100 Hz is 5.12x10(7) cmHz(1/2)/W. The results showed that Pb1-xMgxTiO3 thin film with x=0.06 [PMT(6)] was most suitable for use as a pyroelectric IR detector.
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页码：314 / 320
页数：7
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