Structure and photo-induced volume changes of obliquely deposited amorphous selenium

Details Structure and photo-induced volume changes of obliquely deposited amorphous selenium Structure and photo-induced volume changes of obliquely deposited amorphous selenium

2008-06-25

arxiv.org/abs/0806.4066v3

Physics

Condensed Matter

Materials Science

14 pages

Scientific paper

10.1063/1.3021464

Atomic scale computer simulations on structures and photo induced volume changes of flatly and obliquely deposited amorphous selenium films have been carried out in order to understand how the properties of chalcogenide glasses are influenced by their preparation method. Obliquely deposited a-Se thin films contain more coordination defects, larger voids than the flatly deposited ones. To model the photo induced volume changes the electron excitation and hole creation were treated independently within the framework of tight-binding formalism. Covalent and interchain bond breakings and formations were found. The obliquely deposited samples containing voids showed a wide spectrum of photo induced structural changes in microscopic and volume changes in macroscopic levels.

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