The electromigration of gold in glassy As2Se3

Abstract

The migration of gold in amorphous arsenic selenide, influenced by an electric field, is investigated in the range 130 to 180°C by means of radioactive tracers. In order to evaluate the electromigration profiles, the exact solution of the Fick equation with drift term under the initial condition of a thin layer on a semi‐infinite is derived and applied. The displacement of the concentration peak yields the mobility and the charge of the migrating gold atoms: at 180°C 2.9 × 10−11 cm2/Vs and 1e, respectively. The deviations of the experimental diffusion profiles from the theoretical ones are discussed.

Study of gold and platinum impurity atom state in vitreous arsenic selenide

“…At the end we note that the charge of gold impurity atoms in vitreous As,Se, has been defined by the authors of [7, 81 using the electrotransport method. Our data are in agreement with the ones obtained in [7], where this charge a t 120 "C was found to be (1.40 f 0.20) e, but are in poor accordance with the data of [S], where 2 = 0.2e was found. It is hardly possible to account for the discrepancy between our data and those of [S] as well as between the data of [7] and [S].…”

Determination of the charge of migrating impurities from electrodiffusion profiles: The system a-As2Se3:Cu

“…The higher left-hand D's cannot be caused by the influence of the semi-infinite geometry. The exact solution presented in [13], being slightly asymmetric, cannot explain the measured profiles, as is demonstrated in Fig. 3c; -the simultaneous migration of different species.…”

Problèmes liés au développement des commutateurs à semiconducteur amorphe

“…3.2 L'ÉLECTROMIGRATION. -L'application d'un champ électrique sur un dispositif est une contrainte favorisant l'électromigration [16].…”