Electrical conductivity of doped ZnS

Abstract

The electrical conductivity of doped ZnS with different impurities (Mn, Fe, Co, Ni and Cu) of various concentrations has been measured to verify the existence of ladderlike levels of 'killers' of luminescence. Attempts have been made to ascertain the separation between-the valence band of the host ZnS and the ground state of the accepter impurities and also to investigate the effect of various concentrations of impurities on the electrical conductivity of doped ZnS.

Structural and Electrical Conductivity Studies of Doped ZnS

“…From this figure, it has been observed that as the impurity concentration is increased, conductivity first increases (the samples 50.01 and S0.1) and then the trend reverses (the samples S1 and S2). A similar kind of behaviour has been observed in the case of ZnS doped with Fe and Cu [6]. The increase of conductivity with increasing concentration of impurity up to a certain level may be attributed to an increase in the number of charge carriers [7].…”

“…The samples were labelled according to the dopant concentrations, for example the sample S0.01 had 0.01 mole % of Coe+ impurity ions. The other details regarding the sample synthesis are similar to those reported earlier [6]. The resistivity measurements between room temperature (RT) and 1000 K were performed by the two-probe method.…”

Preparation of ternary metal chalcogenide (M1-FexS, M = Cd and Zn) nanocrystallites using single source precursors

“…The luminescent properties of the various metal doped ZnS nanoparticles, nanowires and nanobelts were extensively investigated [17,18]. ZnS based DMS also show electrical [19], magnetic [18] and optical properties [20].…”