期刊
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
卷 51, 期 1, 页码 35-38出版社
WILEY-BLACKWELL
DOI: 10.1002/polb.23156
关键词
(Ba; Sr)TiO3; capacitors; composites; nanoparticles; parylene-C; thin films
资金
- ARPA-e, an office of the US Department of Energy [DE-AR0000114]
Nanoparticle polymer composite capacitors have been examined for some time as a route to high performance, printable capacitors. One approach to creating these composites is to use a particle film together with vapor deposited polymers, which can yield high performance, but also forms a structurally asymmetric device. The performance of a nanoparticle (Ba, Sr)TiO3 (BST)/parylene-C composite capacitor is compared to that of a nanoparticle BST capacitor without the polymer layer under both directions of bias. The composite device shows a five orders of magnitude improvement in the leakage current under positive bias of the bottom electrode relative to the pure-particle device, and four orders of magnitude improvement when the top electrode is positively biased. The voltage tolerance of the device is also improved and asymmetric (44 V vs. 28 V in bottom and top positive bias, respectively). This study demonstrates the advantage of this class of composite device construction, but also shows that proper application of the device bias in this type of asymmetrical system can yield an additional benefit. (C) 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2013
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