A Study on Poly(3,4-ethylenedioxythiophene):Poly(styrene sulfonate)(PEDOT: PSS) Films for the Microbolometer Applications(Session5B: Emerging Devices III)
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概要
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We present Poly (3,4-ethylenedioxythiophene): Poly (Styrene sulfonate) (PEDOT: PSS) films for application in a bolometer, a kind of uncooled infrared image sensor. In order to maximize the sensitivity of an uncooled infrared image sensor, maximization of the temperature coefficient of resistance (TCR) and minimization of the 1/f noise of the sensing materials are required. While the material's resistivity should be large enough for higher TCR, it is widely known that large resistivity usually accompanies high 1/f noise. For this reason, traditional bolometric materials such as vanadium oxide, amorphous silicon and titanium, which respectively have a good ratio of TCR over noise, have been widely used. Numerous conducting polymers have been developed and studied in recent years. The PEDOT: PSS, an aqueous composite, is one of the most successful conducting polymers, and has found a broad range of applications including use in modified electrodes, solar cells, and electroluminescent devices. The film formation of PEDOT: PSS is easily obtained through the spin coating method. The resultant film has an amorphous crystalline structure that is known to have high TCR values. These interesting features suggest that the PEDOT: PSS film is applicable to microbolometer array fabrication. We demonstrated the TCR and 1/f noise dependencies of PEDOT: PSS thin films on the thermal treatment conditions. Thermal treatment was carried out in a temperature range of 200-350℃ with time periods ranging from 5-100 minutes under the nitrogen ambient. It was found that the resistivity, and thereby the TCR and 1/f noise factor K, of the PEDOT: PSS can be modified by specific thermal treatment conditions. It was also showed that the appropriate heat treatment can suppress the 1/f noise of the PEDOT: PSS thin film while maintaining the resistivity and TCR. It was thus concluded that the PEDOT: PSS has potential for use as a bolometer material. This paper presents a performance evaluation and analysis of the PEDOT: PSS based bolometer on the basis of the figure of merit (TCR over Noise). An optimized figure of merit is also presented.
- 社団法人電子情報通信学会の論文
- 2008-07-02
著者
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Lee Yong
Korea Advanced Inst. Sci. And Technol. Daejeon Kor
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Lee Hee
Dept. Of Eecs Korea Advanced Institute Of Science And Technology:national Nanofab Center
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Lee Hee
School Of Electrical Engineering And Computer Sciences Korea Advanced Institute Of Science And Techn
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Lee Hee
School Of Electrical Engineering And Computer Science Division Of Electrical Engineering Korea Advan
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Lee Hee
Dept Of Eecs Korea Advanced Institute Of Science And Technology
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Lee Yong
Dept. of Electrical Eng., Korea Advanced Institute of Science and Technology
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Lee Yong
Dept. Of Eecs Korea Advanced Institute Of Science And Technology
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Lee Yong
Department Of Electrical Engineering And Computer Science Korea Advanced Institute Of Science And Te
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Lee Yong
Department Of Electrical Engineering And Computer Science Kaist
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Lee Yong
Dept Of Eecs Korea Advanced Institute Of Science And Technology
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Lee Yong
Dept. Genet. Eng. Coll. Nat. Sci. Kyungpook Natl. Univ. Korea
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Kwon Il
School Of Electrical Engineering And Computer Sciences Korea Advanced Institute Of Science And Techn
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Son Hyeok
Dept. of EECS, Korea Advanced Institute of Science and Technology
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Kwon Il
Dept. of EECS, Korea Advanced Institute of Science and Technology
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Yoo Ho
Electronics and Telecommunications Research Institute
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Son Hyeok
School Of Electrical Engineering And Computer Sciences Korea Advanced Institute Of Science And Techn
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Lee Hee
School Of Electrical Engineering And Computer Sciences Korea Advanced Institute Of Science And Techn
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Lee Yong
Dept. Chemical and Biomolecular Engineering, KAIST
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