Hexagonal II-VI Structures by Substrate Bandgap Engineering

A synthesis procedure was developed for bulk ZnMgSSe, using metallic Mg and Se. This is done in the growth crucible in the growth system; this reduces contamination from exposure to the laboratory ambient. A growth run with 12% Mg and 8% S (nominal) concentrations was done using our zone melting tec...

Full description

Saved in:
Bibliographic Details
Main Authors: Fitzpatrick, Brian J, Tamargo, Maria C
Format: Report
Language:English
Subjects:
BANDGAP ENGINEERING
COMPOSITE MATERIALS
CONTAMINATION
CRUCIBLES
Crystallography
Electrical and Electronic Equipment
EXPOSURE(GENERAL)
GROUP II-VI COMPOUNDS
HEXAGONAL STRUCTURE
Inorganic Chemistry
Laminates and Composite Materials
MAGNESIUM
METALS
MOLECULAR BEAM EPITAXY
OPTICS
SELENIUM
SEMICONDUCTORS
SOLID STATE PHYSICS
STRUCTURES
SUBSTRATES
SULFUR
SYNTHESIS
TWINNING(CRYSTALLOGRAPHY)
ZINC COMPOUNDS
ZONE MELTING
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A synthesis procedure was developed for bulk ZnMgSSe, using metallic Mg and Se. This is done in the growth crucible in the growth system; this reduces contamination from exposure to the laboratory ambient. A growth run with 12% Mg and 8% S (nominal) concentrations was done using our zone melting technique in a non-seeding crucible. A 45 deg cross-section was made by cleaving; it appeared that one grain was about half of the 26 mm (average) diameter boule. No twins were visible at all. It is, of course, desirable to have twin-free material, but, even more importantly, the lack of twins is a strong indication of hexagonal material, a major goal of the program.