High performance vertical tunneling diodes using graphene/hexagonal boron nitride/graphene hetero-structure

Seung Hwan Lee, Min Sup Choi, Jia Lee, Chang Ho Ra, Xiaochi Liu, Euyheon Hwang, Jun Hee Choi, Jianqiang Zhong, Wei Chen, Won Jong Yoo

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Abstract

A tunneling rectifier prepared from vertically stacked two-dimensional (2D) materials composed of chemically doped graphene electrodes and hexagonal boron nitride (h-BN) tunneling barrier was demonstrated. The asymmetric chemical doping to graphene with linear dispersion property induces rectifying behavior effectively, by facilitating Fowler-Nordheim tunneling at high forward biases. It results in excellent diode performances of a hetero-structured graphene/h-BN/graphene tunneling diode, with an asymmetric factor exceeding 1000, a nonlinearity of ∼40, and a peak sensitivity of ∼12V -1, which are superior to contending metal-insulator-metal diodes, showing great potential for future flexible and transparent electronic devices.

Original languageEnglish
Article number053103
JournalApplied Physics Letters
Volume104
Issue number5
DOIs
StatePublished - 3 Feb 2014

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