Počet záznamů: 1  

High sensitivity hydrogen sensors based on GaN

  1. 1. 0382126 - URE-Y 2013 RIV DE eng J - Článek v odborném periodiku
    Yatskiv, Roman - Grym, Jan - Žďánský, Karel
    High sensitivity hydrogen sensors based on GaN.
    Physica status solidi C. Roč. 7, č. 9 (2012), s. 1661-1663 ISSN 1610-1642.
    [16th International Semiconducting and Insulating Materials Conference (SIMC-XVI). Stockholm, 19.06.2011-23.06.2011]
    Grant CEP: GA MŠk(CZ) OC10021
    Institucionální podpora: RVO:67985882
    Klíčová slova: Pt nanoparticles * Graphite based Schottky diodes * Hydrogen sensor * GaN
    Kód oboru RIV: JA - Elektronika a optoelektronika, elektrotechnika

    High quality graphite based Schottky diodes are presented. Schottky barriers were prepared by mechanical deposition of colloidal graphite on GaN substrates uncoverd and partly covered with Pt nanoparticles deposited by electrophoretic techniques. The electron transport for both diodes can be well described by thermionic emission. Hydrogen sensing characteristics of graphite-Pt/GaN Schottky diodes were investigated. Temperature dependence of the sensitivity, the barrier height variation, the ideality factor and the barrier height itself were studied. The proposed hydrogen sensor responds well to various hydrogen containing gases. The room-temperature sensitivity response of 2x107 was obtained in 1000 ppm H2/N2ambient.
    Trvalý link: http://hdl.handle.net/11104/0216539