Negative capacitance in polymer-nanocrystal composites

被引：31

作者：

Bakueva, L ^{[1
]}

Konstantatos, G

Musikhin, S

Ruda, HE

Shik, A

机构：

[1] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 3G4, Canada

[2] Univ Toronto, Ctr Adv Nanotechnol, Toronto, ON M5S 3E4, Canada

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 16期

关键词：

D O I：

10.1063/1.1807947

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of negative capacitance (NC) was observed and investigated in conducting polymers with embedded PbS nanocrystals. NC occurred for signal frequencies up to 1 MHz and was absent in control samples without nanocrystals. The amplitude of NC increased with the applied bias and was accompanied by a superlinear current-voltage characteristic. A theoretical description of NC is presented based on a voltage-induced redistribution of carriers in a nonuniform sample with nanocrystals playing the role of potential wells for carriers. The characteristic time of carrier capture by nanocrystals, determined from the frequency dispersion of NC, was similar to3x10(-5) s. (C) 2004 American Institute of Physics.

引用

页码：3567 / 3569

页数：3

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