Optical constants of amorphous selenium from X-rays to the far infrared

ArF and KrF Laser-Induced Gas-Phase Photolysis of Selenophene and Tellurophene: Extrusion of Te and Se and Intramolecular 1,3-H Shift Competing with β-C−C Cleavage in C4H4 Residue

“…These relative amounts are not affected by the addition of an inert gas (13−26 kPa of hydrogen or nitrogen). XPS measurements of the deposited films confirmed the presence of elemental selenium (binding energy of the 3d electrons, 55.5 eV), and the UV spectrum of the films showed a broad absorption band with the maximum at 190 nm typical for amorphous selenium …”

“…XPS measurements of the deposited films confirmed the presence of elemental selenium (binding energy of the 3d electrons, 55.5 eV), and the UV spectrum of the films showed a broad absorption band with the maximum at 190 nm typical for amorphous selenium. 7 Tellurophene. The 193-and 248-nm photolyses of tellurophene yield the same three hydrocarbons as those of selenophene (1-buten-3-yne, ethyne, and butadiyne) and produce black films on the reactor surface.…”

Laser-induced gas-phase pyrolysis of dimethyl selenium: chemical deposition of selenium and poly(selenoformaldehyde)

“…7). The amorphous selenium exhibits a strong maximum at 287 nm [33]. It is therefore conceivable that the absorption at 450 nm assigns to the poly(selenoformaldehyde).…”

Síntesis de nanopartículas de selenio por ablación láser

“…Su valor está dado por [175]: ), y energías menores a E 0 , se tiene un comportamiento exponencial de la absorción, al cual se suele referirse como "cola" de absorción (absorption tail), que contrasta con la súbita disminución de la absorción en los cristales. Este comportamiento está asociado al desorden intrínseco asociado a los sólidos amorfos: una posible explicación es la existencia de campos eléctricos locales inducidos por el desorden.…”

“…En el caso del a-Se, el valor de E 0 es 2.1 eV, a temperatura ambiente [174,175] y la forma del coeficiente de absorción obedece la relación:…”