Study of density of localized states in $a-Se_{100-x}Sb_x$ films by space charge limited conduction measurements

Özet

The present paper reports dc conductivity measurements at high electric fields in vacuum evaporated $a-Se_{1-x}Sb_x$(x = 0, 0.02, 0.04, 0.06) thin films. At high fields $(\sim 10^4 V.cm^{-1})$, current can be modelled by the theory of space charge-limited conduction in the case of uniform distribution of localised states in the mobility gap of these materials. The addition of Sb in Se results in an increase in the density of localised states.