Epitaxy of A^IB^IIIC semiconductors

Abstract

Dedicated to Professor Hermann NEELS on the occasion of his 75th birthday Epitaxial layers of AIBIIIClI compounds were grown by the flash evaporation technique and investigated using reflection electron diffraction. Geometric-structural considerations allow the prediction of epitaxial relationships and types of epitaxy (one-or three-dimensional, multiple orientation). These properties of the epitaxial layers were confirmed experimentally. Furthermore, the epitaxial temperature ranges, non-equilibrium phases, defects, and special features of the epitaxial growth are described. Especially, the influence of lattice misfit is discussed.Epitaktische Schichten von AIBIIIC~l-Halbleitern wurden mittels Flash-Verdampfung dargestellt und durch Heflexionselektronenbeugung untersucht. Die mit geometrischstrukturellen Retrachtungen vorausgesagten Verwachsungsgesetze und -typen (ein-und dreidimensionale Epitaxie, Vielfachorientierung) konnten experimentell bestiitigt werden .Weiterhin werden solche Parameter wie Epitaxietemperaturbereich, Nichtgleichgewiclitsphasen, Defekte und Besonderheiten des epitaktischen Wachstums beschrieben. Der Einf1uB der Gitterfehlpassung ist ausfuhrlich diskutiert.

Ternary I−III−VI Quantum Dots Luminescent in the Red to Near-Infrared

“…Bulk Cu-In-Se exists primarily in either a tetragonal chalcopyrite or a high temperature cubic sphalerite phase. 16 The observed wide-angle X-ray scattering (WAXS) and elemental compositions of the Cu-In-Se QDs were found to be welldescribed by an ordered vacancy chalcopyrite structure. Analysis S2).…”

“…Bulk Cu-In-Se exists primarily in either a tetragonal chalcopyrite or a high temperature cubic sphalerite phase. 16 The observed wide angle X-ray scattering (WAXS) and elemental compositions of the Cu-In-Se QDs were found to be well described by an ordered vacancy chalcopyrite (OVC) structure. Analysis of 6 nm CuIn 1.5 Se 3 QDs WAXS data began by creating a chalcopyrite model unit cell using experimentally determined copper, indium, and selenium stoichiometries.…”