عنوان

Photoluminescence characterization of zinc(1-x) manganese(x) sulfur under different excitation sources

Number

TLpq230794640

.Language of Text, Soundtrack etc

انگلیسی

Title Proper

Photoluminescence characterization of zinc(1-x) manganese(x) sulfur under different excitation sources

General Material Designation

[Thesis]

First Statement of Responsibility

Y. Ye

Subsequent Statement of Responsibility

F. D. Medina

Name of Publisher, Distributor, etc.

Florida Atlantic University

Date of Publication, Distribution, etc.

1993

Specific Material Designation and Extent of Item

128

Dissertation or thesis details and type of degree

M.S.

Body granting the degree

Florida Atlantic University

Text preceding or following the note

1993

Text of Note

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 ions (d-d electrons), and the exchange interaction between 3d electrons of Mn 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.

Applied sciences

Condensation

Materials science

Optics

Optics

Pure sciences

F. D. Medina

Y. Ye

Electronic name

p

[Thesis]

276903

a

Y