Structure and performance of dielectric films based on self-assembled nanocrystals with a high dielectric constant

Huang, Limin1,2; Liu, Shuangyi1,3; Van Tassell, Barry J.1,4; Liu, Xiaohua1,5; Byro, Andrew1,5; Zhang, Henan5; Leland, Eli S.1; Akins, Daniel L.5; Steingart, Daniel A.1,4; Li, Jackie3; O'Brien, Stephen1,5

2013-10-18

10.1088/0957-4484/24/41/415602

NANOTECHNOLOGY   影响因子和分区

0957-4484

1361-6528

Self-assembled films built from nanoparticles with a high dielectric constant are attractive as a foundation for new dielectric media with increased efficiency and range of operation, due to the ability to exploit nanofabrication techniques and emergent electrical properties originating from the nanoscale. However, because the building block is a discrete one-dimensional unit, it becomes a challenge to capture potential enhancements in dielectric performance in two or three dimensions, frequently due to surface effects or the presence of discontinuities. This is a recurring theme in nanoparticle film technology when applied to the realm of thin film semiconductor and device electronics. We present the use of chemically synthesized. (Ba; Sr)TiO3 nanocrystals, and a novel deposition-polymerization technique, as a means to fabricate the dielectric layer. The effective dielectric constant of the film is tunable according to nanoparticle size, and effective film dielectric constants of up to 34 are enabled. Wide area and multilayer dielectrics of up to 8 cm(2) and 190 nF are reported, for which the building block is an 8 nm nanocrystal. We describe models for assessing dielectric performance, and distinct methods for improving the dielectric constant of a nanocrystal thin film. The approach relies on evaporatively driven assembly of perovskite nanocrystals with uniform size distributions in a tunable 7-30 nm size range, coupled with the use of low molecular weight monomer/polymer precursor chemistry that can infiltrate the porous nanocrystal thin film network post assembly. The intercrystal void space (low k dielectric volume fraction) is minimized, while simultaneously promoting intercrystal connectivity and maximizing volume fraction of the high k dielectric component. Furfuryl alcohol, which has good affinity to the surface of. (Ba; Sr ) TiO3 nanocrystals and miscibility with a range of solvents, is demonstrated

SCI ; EI

英语

通讯

NSF[1122594]

Science & Technology - Other Topics ; Materials Science ; Physics

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:000325141900013

IOP PUBLISHING LTD

20134016805086

Deposition ; Film preparation ; High-k dielectric ; Low-k dielectric ; Multilayers ; Nanocrystals ; Nanoparticles ; Perovskite ; Perovskite solar cells ; Volume fraction

Minerals:482.2 ; Thermodynamics:641.1 ; Dielectric Materials:708.1 ; Nanotechnology:761 ; Chemical Operations:802.3 ; Solid State Physics:933

MATERIALS SCIENCE

Web of Science

1.CUNY, CUNY Energy Inst, New York, NY 10031 USA
2.South Univ Sci & Technol China, Dept Chem, Shenzhen 518005, Peoples R China
3.CUNY, Grove Sch Engn, Dept Mech Engn, New York, NY 10031 USA
4.CUNY, Grove Sch Engn, Dept Chem Engn, New York, NY 10031 USA
5.CUNY, Dept Chem, New York, NY 10031 USA

Huang, Limin,Liu, Shuangyi,Van Tassell, Barry J.,et al. Structure and performance of dielectric films based on self-assembled nanocrystals with a high dielectric constant[J]. NANOTECHNOLOGY,2013,24(41).

Huang, Limin.,Liu, Shuangyi.,Van Tassell, Barry J..,Liu, Xiaohua.,Byro, Andrew.,...&O'Brien, Stephen.(2013).Structure and performance of dielectric films based on self-assembled nanocrystals with a high dielectric constant.NANOTECHNOLOGY,24(41).

Huang, Limin,et al."Structure and performance of dielectric films based on self-assembled nanocrystals with a high dielectric constant".NANOTECHNOLOGY 24.41(2013).