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Sol-gel-derived pyroelectric barium strontium titanate thin films for infrared detector applications |
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| Authors: | J.-G. Cheng J. Tang A.-J. Zhang X.-J. Meng J.-H. Chu |
| Affiliation: | (1) National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, P.R. China, CN;(2) Shanghai Dekai Instrument Co., ltd, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, P.R. China (Fax: +86-21/6583-0734, E-mail: jgcheng@mail.sitp.ac.cn), CN |
| Abstract: | Quality pyroelectric Ba0.8Sr0.2TiO3 films have been successfully fabricated by a sol-gel processing using a highly diluted precursor solution. The remnant polarization of the films decreases with the temperature increasing, which results in a large pyroelectric coefficient at room temperature. Infrared response measured using a 500-K chopped blackbody at room temperature exhibits a typical pyroelectric response waveform. Frequency dependence of the infrared response measurement for a pixel with area of 2.5×10-3 cm2 showed that the maximum response output voltage of 3.2 mV was obtained at 6 Hz. Better infrared response can be expected by the improvement in thermal isolation of the pixels and electrode materials. Received: 26 April 2000 / Accepted: 9 May 2000 / Published online: 9 August 2000 |
| Keywords: | PACS: 77.70.+a 77.84.Dy 81.20.Fw |
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