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RISS 인기검색어
- 검색키워드
- 저자 : V. I. Kozub (검색결과 3 건)
- 무료
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Non-Ohmic conduction in polydiacetylene thin films
Aleshin, A.N.,Chu, S.W.,Kozub, V.I.,Lee, S.W.,Lee, J.Y.,Lee, S.H.,Kim, D.W.,Park, Y.W. Elsevier 2005 CURRENT APPLIED PHYSICS Vol.5 No.1
<P><B>Abstract</B></P><P>We have studied the current–voltage (<I>I</I>–<I>V</I>) characteristics of polydiacetylene (PDA) thin films in the temperature region 300–1.7 K. It was found that at electric fields higher than 2×10<SUP>4</SUP> V/cm, the <I>I</I>–<I>V</I> characteristics are strongly super-linear with negative temperature coefficient of starting voltage. Negative gate voltage increases the source-drain current (the effect is more pronounced at low temperature), whereas the magnetic field up to 7 T does not affect it. The results demonstrate that at low temperature the charge transport is mainly supported due to a charge injection and tunneling from the metallic banks, whereas at higher temperatures the activation energy is related to the band gap mismatch between the different polymer chains or granules.</P>
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Non-Ohmic conduction in polydiacetylene thin films
A. N. Aleshin,S. W. Chu,V. I. Kozub,이상욱,J. Y. Lee,S. H. Lee,D. W. Kim,박영우 한국물리학회 2005 Current Applied Physics Vol.5 No.1
We have studied the currentvoltage (IV) characteristics of polydiacetylene (PDA) thin lms in the temperature region 3001.7K. It was found that at electric elds higher than 2· 104 V/cm, theIV characteristics are strongly super-linear with negativetemperature coecient of starting voltage. Negative gate voltage increases the source-drain current (the eect is more pronounced atlow temperature), whereas the magnetic eld up to 7 T does not aect it. The results demonstrate that at low temperature the chargetransport is mainly supported due to a charge injection and tunneling from the metallic banks, whereas at higher temperatures theactivation energy is related to the band gap mismatch between the dierent polymer chains or granules.
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Low-temperature saturation of dephasing in heavily doped conjugated polymers
A. N. Aleshin,V. I. Kozub,D. -S. Suh,Y. W. Park 한국물리학회 2002 Current Applied Physics Vol.2 No.1
Based on our low temperature (down to 0.5 K) electronic transport studies of heavily doped polyacetylene and magnetotransportresults reported for other heavily doped conjugated polymers, we demonstrate that the low-temperature saturation of electrondephasing found for metallic and semiconducting materials is also exhibited in conducting polymers. Such behavior explained by amodel, which involves electron dephasing by two-level systems of a special type originating from initially symmetric defect con-gurations where the symmetry is partially lifted by disorder.
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