Interchain Interaction in Semiconducting Liquid and Amorphous Selenium

Structure and relaxation in liquid and amorphous selenium

We report a molecular dynamics simulation of selenium, described by a three-body interaction. The temperatures Tg and Tc and the structural properties are in agreement with experiment. The mean nearest neighbor coordination number is 2.1. A small prepeak at about 1 Å can be explained in terms of void correlations. In the intermediate self-scattering function, i.e., the density fluctuation corre...

Running head: COMPARISON OF AMORPHOUS SELENIUM AND AMORPHOUS 1 Comparison of Amorphous Selenium and Amorphous Silicon Flat-Panel Detectors

Digital radiographic flat-panel detectors may operate with direct or indirect manners of converting x-ray photon energy into spatial energy signals. Advances in both technologies have led to radiographic work areas that are faster and lend toward lower patient radiation doses. Superior image quality with an abundance of post-processing capabilities is a benefit as well. Whether based on amorpho...

Photoinduced volume changes in amorphous selenium.

We have modeled the photoinduced volume change in amorphous selenium. After photon absorption, we treated the excited electron and hole independently within the framework of the tight-binding formalism. We found covalent bond breaking in amorphous networks with photoinduced excited electrons, whereas excited holes contribute to the formation of interchain bonds. We also observed a correlated vo...

Intrinsic nature of visible-light absorption in amorphous semiconducting oxides

X-ray imaging with amorphous selenium: theoretical feasibility of the liquid crystal light valve for radiography.

A novel radiographic imaging system based on a liquid crystal light valve is described. A liquid crystal light valve is a photon addressed spatial light modulator that consists of a high resolution, solid-state electrostatic detector (photoconductor) and an electro-optic light modulator (liquid crystal cell) physically coupled in a sandwich structure. We propose a light valve with a thick, x-ra...