Room Temperatures Excitons in ll-VI CdZnTe/ZnTe Multiple Quantum Wells,
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP007830
Entities
People
- Aaron M. Johnson
- Dongjin Lee
- J. E. Zucker
- R. D. Felderman
- R. F. Austin