Microscopic Optical Characterization of ZnO Bulk Crystals, Free Standing III-Nitride Substrates and III-V Structures for Non-Linear Optics
Abstract
This report results from a contract tasking Universidad de Valladolid as follows: Objective 1: To study the influence of the growth parameters on the defects and inhomogeneities of ZnO crystals grown by Hydrothermal technique. This technique has the advantage of large bulk crystal production, but presents the possibility of unintentional impurity introduction. Furthermore, the incorporation of impurities is not uniform. This objective will be achieved by the way of: Analysis of the distribution of defects and impurities in the different growth sectors and faces (Zn, and 0 terminated) using SRCL. Study of the distribution of the excitonic luminescence and the green and orange bands using SRCL. Spectral CL images to understand the incorporation of impurities and native defects in terms of homogeneity. Identification of unintentional impurities introduced during growth. Influence of the growth conditions, nutrient, solvent (KOH, LiOH...) and saturation temperature, on the incorporation of impurities and native defects. Study of the role of Hydrogen. Study of the luminescence in damaged surfaces by varying the voltage of the e-beam excitation to reach different depths of analysis. Study of the surface quality using simultaneous UV microRaman spectroscopy and microphotoluminescence.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 2008
- Accession Number
- ADA494570
Entities
People
- Alex Martin
- J. Mass
- Juan Jimenez Lopez
- M. Avella
- O. Martinez
Organizations
- University of Valladolid