DEVELOPMENT OF SiC DEVICES FOR DIAGNOSTICS AND CONTROL OF COMBUSTION PRODUCTS IN ENERGY PLANT ENVIRONMENTS Metadata

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Title

  • Main Title DEVELOPMENT OF SiC DEVICES FOR DIAGNOSTICS AND CONTROL OF COMBUSTION PRODUCTS IN ENERGY PLANT ENVIRONMENTS

Creator

  • Author: Ghosh, Ruby N.
    Creator Type: Personal
  • Author: Tobias, Peter
    Creator Type: Personal

Contributor

  • Sponsor: United States
    Contributor Type: Organization

Publisher

  • Name: Michigan State University (United States)
    Place of Publication: United States

Date

  • Creation: 2003-12-01

Language

  • English

Description

  • Content Description: A sensor based on the wide bandgap semiconductor, silicon carbide (SiC), has been developed for the detection of combustion products in power plant environments. The sensor is a catalytic gate field effect device that can detect hydrogen containing species in chemically reactive, high temperature environments. The response of these metal/insulator/SiC (MISiC) devices to reducing gases has been assumed to be due to the reduction in the metal work function at the metal/oxide interface that shifts the capacitance to lower voltages. From in-situ capacitance-voltage measurements taken under sensor operating conditions we have discovered that two independent mechanisms are responsible for the sensor response to hydrogen and oxygen. We present a model of the device response based on the chemically induced shift of the metal/semiconductor barrier height as well as the passivation and creation of charged states at the SiO{sub 2}/SiC interface. The latter mechanism is much slower than the barrier height shift. Preliminary photoemission experiments have been performed to independently monitor the contribution of the two phenomena. We discuss in detail the effect of these results on sensor design and the choice of operating point for high temperature operation.
  • Physical Description: 46 pages

Subject

  • Keyword: Silicon Carbides
  • STI Subject Categories: 08 Hydrogen
  • STI Subject Categories: 36 Materials Science
  • Keyword: Oxygen
  • Keyword: Gases
  • Keyword: Passivation
  • Keyword: Detection
  • Keyword: Design
  • Keyword: Capacitance
  • Keyword: Combustion Products
  • Keyword: Work Functions
  • Keyword: Monitors
  • Keyword: Hydrogen
  • Keyword: Power Plants
  • Keyword: Photoemission

Source

  • Other Information: PBD: 1 Dec 2003

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Report No.: NONE
  • Grant Number: FG26-01NT41358
  • DOI: 10.2172/823389
  • Office of Scientific & Technical Information Report Number: 823389
  • Archival Resource Key: ark:/67531/metadc785821

Note

  • Display Note: OSTI as DE00823389