Amorphous selenium thin films prepared using chemical bath deposition: optimization of the deposition process and characterization

Abstract

Amorphous selenium films were prepared at room temperature using the simple and safe method of chemical bath deposition. This was achieved with an acidified solution of Na 2 SeSO 3 at a pH value of 4.5. In order to confirm the formation of amorphous selenium (a-Se), samples were characterized using x-ray diffraction, x-ray photoelectron spectroscopy, secondary ion mass spectroscopy and optical absorption studies. The optical bandgap of the material was found to be 2.09 eV. Indium selenide could be prepared by annealing this a-Se in a multilayer structure glass/SnO 2 /a-Se/In.

Cathodic electrodeposition of mixed molybdenum–selenium oxides

“…9a). In support of our voltammetry and coulometry experiments, the literature indicates that this absorbance is consistent with the formation of an electronically insulating Se 0 phase [60]. By comparison, film deposition from a 0.1 F peroxo-polymolybdate solution displays a broad absorbance over the entire visible-NIR region of interest (400-1000 nm).…”

Anomalous photoconductivity in gamma In2Se3

“…16 Over this, In was deposited using resistive heating, at a pressure of ϳ2 ϫ 10 −5 mbar. Thin films of selenium with a thickness of 200 nm ͓measured using stylus thickness profiler ͑Model-Dektak 6M͔͒ were deposited on the glass substrate using chemical bath deposition technique.…”

Chemically Deposited Se Thin Films and Their Use as a Planar Source of Selenium for the Formation of Metal Selenide Layers

“…23 The as-prepared Se-ZnS films are amorphous in accordance with previous reports. [1][2][3]21 Figure 1 shows the XRD patterns recorded at grazing incidence of = 1.5 ‫ؠ‬ for Se-ZnS thin films annealed under different conditions. Figure 1a shows the pattern for hexagonal-phase Se ͑PDF-73-0465; a = 4.3662 Å, c = 4.9536 Å͒, and Fig.…”