Advanced Microelectronic Center Aachen (AMICA), AMO GmbH, Otto-Blumenthal-Str. 25, 52074 Aachen, Germany.
Nanoscale. 2017 Aug 24;9(33):11944-11950. doi: 10.1039/c7nr02793a.
Vertical metal-insulator-graphene (MIG) diodes for radio frequency (RF) power detection are realized using a scalable approach based on graphene grown by chemical vapor deposition and TiO as barrier material. The temperature dependent current flow through the diode can be described by thermionic emission theory taking into account a bias induced barrier lowering at the graphene TiO interface. The diodes show excellent figures of merit for static operation, including high on-current density of up to 28 A cm, high asymmetry of up to 520, strong maximum nonlinearity of up to 15, and large maximum responsivity of up to 26 V, outperforming state-of-the-art metal-insulator-metal and MIG diodes. RF power detection based on MIG diodes is demonstrated, showing a responsivity of 2.8 V W at 2.4 GHz and 1.1 V W at 49.4 GHz.
垂直金属-绝缘体-石墨烯 (MIG) 二极管可用于射频 (RF) 功率检测，这是一种基于化学气相沉积法生长的石墨烯和 TiO 作为势垒材料的可扩展方法。考虑到石墨烯-TiO 界面处的偏置诱导势垒降低，通过热电子发射理论可以描述二极管中随温度变化的电流流动。该二极管在静态操作中具有出色的性能，包括高达 28 A/cm 的高导通电流密度、高达 520 的高不对称性、高达 15 的强最大非线性和高达 26 V 的大最大响应度，优于最先进的金属-绝缘体-金属和 MIG 二极管。基于 MIG 二极管的 RF 功率检测也得到了演示，在 2.4 GHz 时的响应度为 2.8 V/W，在 49.4 GHz 时的响应度为 1.1 V/W。
