Accession Number : ADP007830

Title :   Room Temperatures Excitons in ll-VI CdZnTe/ZnTe Multiple Quantum Wells,

Corporate Author : AT AND T BELL LABS HOLMDEL NJ

Personal Author(s) : Lee, D. ; Johnson, A. M. ; Zucker, J. E. ; Felderman, R. D. ; Austin, R. F.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Recent room temperature observations of lasing, excitonic absorption peaks, and blue LEDs in wide-gap H-VI semi conductor multiple quantum wells (MQWs) provide great promise for unique device applications. A good understanding of the physical mechanisms necessary to account for these recent observations could be extremely important for future device applications. The present CdZnTe/ZnTe system has intriguing properties -alloy quantum wells and strained layers. Nevertheless, excellent sample quality is indicated by a very small Stokes shifts of the photoluminescence (PL) with respect to the PL excitation spectrum (PLE) and narrow absorption linewidths. Furthermore, well-defined room temperature absorption peaks are observed for a wide range of Cd concentrations and well-widths. This offers large flexibility in the choice and composition of materials for better bandgap engineering.

Descriptors :   *PHOTOLUMINESCENCE, *EXCITONS, *QUANTUM ELECTRONICS, ABSORPTION, ALLOYS, BLUE(COLOR), ENGINEERING, EXCITATION, LAYERS, OBSERVATION, QUALITY, ROOM TEMPERATURE, SELECTION, GROUP II-VI COMPOUNDS, LIGHT EMITTING DIODES, ZINC TELLURIDES, CADMIUM TELLURIDES.

Subject Categories : Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE