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"Semiconductor Interfaces at the Nanoscale" icon

Semiconductor Interfaces at the Nanoscale

The trend in downscaling of electronic devices and the need to add functionalities such as sensing and nonvolatile memory to existing circuitry dictate that new approaches be developed for device structures and fabrication technologies. Various device technologies are being investigated, including nanotube/nanowire transistors, molecular electronic components and electrical/mechanical sensor platforms. In all of these approaches, two distinct interface problems must be addressed: i) control of the physical interfaces (surfaces/junctions) within the device, in order to achieve suitable and stable device performance and ii) interfacing to external circuitry, to allow integration into existing architectures. This tutorial will focus on the physical interfaces. The talk will include a brief overview of metal/semiconductor interfaces, and will discuss the challenges and opportunities in controlling the barrier heights for Schottkybarriers and contact structures. The presentation will also consider the electrical properties of metal-molecule-semiconductor device structures, in which the molecular layers can modify the effective barrier heights atthe semiconductor interface.

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