On the thickness dependence of both the optical band gap and reversible photodarkening in amorphous Ge-Se films.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F16%3A00467629" target="_blank" >RIV/61389013:_____/16:00467629 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216275:25310/16:39902095

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.tsf.2016.10.037" target="_blank" >http://dx.doi.org/10.1016/j.tsf.2016.10.037</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tsf.2016.10.037" target="_blank" >10.1016/j.tsf.2016.10.037</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the thickness dependence of both the optical band gap and reversible photodarkening in amorphous Ge-Se films.

Popis výsledku v původním jazyce

Amorphous Ge30.5Se69.5 and Ge39.5Se60.5 films were prepared by thermal evaporation from previously synthetized bulk glasses. We did not observe a shift in the optical band gap values associated with the change in film thickness for the virgin and annealed states of the thin films. Certain minor changes in the optical band gap values were explained by the change in the chemical composition and by the change in the sample disorder. Both ultraviolet and visible and far infrared spectra indicate that annealed Ge39.5Se60.5 thin films are practically insensitive to the illumination while Ge30.5Se69.5 thin films show a reversible photodarkening. The observed reversible changes of the optical band gap for Ge30.5Se69.5 thin films were also not dependent on the film thickness. The network structural rigidity, which can be combined with a quick relaxation of the light induced excitation directly back to the ground state, was suggested as the reason for the absence of reversible photodarkening in Ge39.5Se60.5 thin films.

Název v anglickém jazyce

On the thickness dependence of both the optical band gap and reversible photodarkening in amorphous Ge-Se films.

Popis výsledku anglicky

Amorphous Ge30.5Se69.5 and Ge39.5Se60.5 films were prepared by thermal evaporation from previously synthetized bulk glasses. We did not observe a shift in the optical band gap values associated with the change in film thickness for the virgin and annealed states of the thin films. Certain minor changes in the optical band gap values were explained by the change in the chemical composition and by the change in the sample disorder. Both ultraviolet and visible and far infrared spectra indicate that annealed Ge39.5Se60.5 thin films are practically insensitive to the illumination while Ge30.5Se69.5 thin films show a reversible photodarkening. The observed reversible changes of the optical band gap for Ge30.5Se69.5 thin films were also not dependent on the film thickness. The network structural rigidity, which can be combined with a quick relaxation of the light induced excitation directly back to the ground state, was suggested as the reason for the absence of reversible photodarkening in Ge39.5Se60.5 thin films.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

—

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Thin Solid Films

ISSN

0040-6090

e-ISSN

—

Svazek periodika

619

Číslo periodika v rámci svazku

30 November

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

6

Strana od-do

336-341

Kód UT WoS článku

000389610900049

EID výsledku v databázi Scopus

2-s2.0-84998953935