Solution-Processed Dielectrics Based on Thickness-Sorted Two-Dimensional Hexagonal Boron Nitride Nanosheets

Nano Letters
Jian ZhuMark C Hersam

Abstract

Gate dielectrics directly affect the mobility, hysteresis, power consumption, and other critical device metrics in high-performance nanoelectronics. With atomically flat and dangling bond-free surfaces, hexagonal boron nitride (h-BN) has emerged as an ideal dielectric for graphene and related two-dimensional semiconductors. While high-quality, atomically thin h-BN has been realized via micromechanical cleavage and chemical vapor deposition, existing liquid exfoliation methods lack sufficient control over h-BN thickness and large-area film quality, thus limiting its use in solution-processed electronics. Here, we employ isopycnic density gradient ultracentrifugation for the preparation of monodisperse, thickness-sorted h-BN inks, which are subsequently layer-by-layer assembled into ultrathin dielectrics with low leakage currents of 3 × 10(-9) A/cm(2) at 2 MV/cm and high capacitances of 245 nF/cm(2). The resulting solution-processed h-BN dielectric films enable the fabrication of graphene field-effect transistors with negligible hysteresis and high mobilities up to 7100 cm(2) V(-1) s(-1) at room temperature. These h-BN inks can also be used as coatings on conventional dielectrics to minimize the effects of underlying traps, resul...Continue Reading

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Citations

Oct 30, 2016·Proceedings of the National Academy of Sciences of the United States of America·Joohoon KangMark C Hersam
Jan 25, 2017·Scientific Reports·Mads L TrolleValerie Véniard
Jul 30, 2016·Science·K S NovoselovA H Castro Neto
Apr 19, 2018·Chemical Society Reviews·Guohua HuTawfique Hasan
Jun 16, 2018·Chemical Society Reviews·Xingke CaiHui-Ming Cheng
Aug 11, 2018·Advanced Materials·Joohoon KangMark C Hersam
Nov 20, 2016·Advanced Materials·Jian Zhu, Mark C Hersam
Feb 21, 2019·Advanced Materials·Jia SunJeong Ho Cho
Dec 16, 2016·Physical Chemistry Chemical Physics : PCCP·Hengcong TaoJohn Texter
May 24, 2017·Chemical Communications : Chem Comm·R FrisendaA Castellanos-Gomez
Jun 9, 2016·Advanced Materials·Francesco BonaccorsoClaudia Backes
Jun 10, 2021·Advanced Science·Fuad Indra Alzakia, Swee Ching Tan
Feb 28, 2017·Accounts of Chemical Research·Joohoon KangMark C Hersam
Dec 14, 2016·ACS Omega·Angel Mary JosephKuzhichalil Peethambharan Surendran
Jun 12, 2018·ACS Nano·Linda M GuineyMark C Hersam
Sep 12, 2019·ACS Applied Materials & Interfaces·Hong-Ran ZhaoHai-Bin Yu
Jan 12, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Matthew S GilliamAlexander A Green
Oct 30, 2020·ACS Nano·Yue ShiTakayoshi Sasaki
Jan 9, 2021·ACS Applied Materials & Interfaces·Shingyu BokByungkwon Lim
May 10, 2020·ACS Applied Materials & Interfaces·Joseph NeilsonBrian Derby
Sep 9, 2021·Chemical Society Reviews·Sebastiano BellaniFrancesco Bonaccorso
Oct 12, 2021·Advanced Materials·Sanchuan ZhaoJian Zhu
Oct 10, 2021·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Mohammed J MezianiYa-Ping Sun

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