Hydrogen Interaction with Defects in ZnO

František Lukáč; Jakub Čížek; Marián Vlček; Ivan Procházka; Martin Vlach; Wolfgang Anwand; Gerhard Brauer; Franziska Traeger; Detlef Rogalla; Hans Werner Becker; Stefan Wagner; Helmut Uchida; Carsten Bähtz

doi:10.4028/www.scientific.net/MSF.733.228

Paper Titles

In Situ Monitoring of Adsorption and Desorption of n-Heptane on Porous Silica by Positron Annihilation Lifetime Spectroscopy
p.207

Positron and Positronium Annihilation as Probes to Identify Cation Substitution Effects in CoCr_xFe_2-xO₄
p.215

Ni-Substitution Induced Inversion in ZnFe₂O₄ Seen by Positron Annihilation
p.219

Positron Lifetime at Deep Donors of Radiation Origin in Proton - Irradiated FZ-Silicon Single Crystals
p.224

Hydrogen Interaction with Defects in ZnO
p.228

Hydrogen-Induced Defects of Subsurface Layer in ZnO Single Crystal Probed by a Slow Positron Beam
p.232

Effect of Sintering on Defects in Yttria Stabilised Zirconia
p.236

Positron Annihilation at Planar Defects in Oxides
p.240

Evidence of the Participation of Electronic Excited States in the Mechanism of Positronium Formation in Substitutional Tb_1-xEu_x(dpm)₃ Solid Solutions Studied by Optical and Positron Annihilation Spectroscopies
p.245

HomeMaterials Science ForumMaterials Science Forum Vol. 733Hydrogen Interaction with Defects in ZnO

Hydrogen Interaction with Defects in ZnO

Abstract:

In the present work hydrothermally grown ZnO single crystals were electrochemically charged with hydrogen. The influence of hydrogen on ZnO microstructure was investigated by positron annihilation spectroscopy (PAS) combined with X-ray diffraction (XRD) using synchrotron radiation. Hydrogen concentration in the samples was determined by nuclear reaction analysis (NRA). It was found that a high concentration of hydrogen can be introduced into ZnO by electrochemical loading. At low concentrations, absorbed hydrogen causes elastic volume expansion of ZnO crystal. At higher concentration, hydrogen-induced stresses exceed the yield stress in ZnO and plastic deformation of the crystal takes place leading to formation of a defected subsurface layer in the crystals.