Date of Award
1993
Document Type
Thesis
Publication Status
Version of Record
Submission Date
October 2026
Thesis/Dissertation Advisor [Chair]
Medina, Fernando D.
Abstract
A study of the temperature dependence of the photoluminescence spectra from Zn1-xMnxS (x = 0.01, 0.03, 0.05, 0.10, 0.20, 0.25, 0.30, 0.35 and 0.50) with different excitation energies (514.5, 488.0, 457.9, 405.5 and 365.9 nm) is given. A new band is reported in addition to the four usual emission bands. The unusual shift of the 2.1 eV (YEL) band energy is first observed in our experiments. Models for YEL, ORG (2.0 eV) and RED (1.7 eV) emission bands have been proposed. The quenching with concentration and temperature and the influence of excitation energy on the photoluminescence are discussed. The spin-spin exchange interaction between the nearest neighbor Mn^+2 ions (d-d electrons), and the exchange interaction between 3d electrons of Mn^+2 ions and the conduction or valence band electrons (d-s or d-p electrons) are introduced to interpret the shift of the bands. The strong electron-phonon interaction is also analyzed, and an effective phonon energy and a Huang-Rhys factor are obtained.
Extent
130 p.
Recommended Citation
Ye, Yubin, "Photoluminescence characterization of zinc(1-x) manganese(x) sulfur under different excitation sources" (1993). Electronic Theses and Dissertations 1990 - 1999. 487.
https://digitalcommons.fau.edu/etd_general_4/487
Identifier
FADT14988
Comments
Thesis (M.S.)--Florida Atlantic University, 1993.|Thesis (M.S.)--Florida Atlantic University, 1993.