Journal of The Electrochemical Society · 1984 · 16 citations · 0 references
Natural SciencesChemistryMaterials ScienceOptical MaterialsPhysical ChemistrySemiconductor MaterialsOptical Properties Of SemiconductorsPhotochemistrySemiconductor Device MaterialsSemiconductor InterfacesSemiconductor NanomaterialsSemiconductor SurfacesAnnealingCadmium SelenideLine Emission SpectraPhotoluminescencePhotoluminescence SpectroscopyRadiative TransitionsThermal AnnealingVacancy Complexes
Photoluminescence spectra of chemical bath deposited films have been taken. It is shown that the emission line reaching from 0.8 to 2.4 eV depends on the stoichiometry of the films. The stoichiometry is controlled either by changing the pH of the working solution during the deposition process or by carrying out a thermal annealing in air on the films. The most stoichiometric films present a green edge emission line which persists even at room temperature. This line is identified as a radiative transition between a Cd complex and an S vacancy.