Currents considerably in excess of those predicted by Ohm's law can be drawn through p-type ZnTe showing injection electroluminescence when sufficiently large voltages are applied. These currents can be explained by Lampert theory of one carrier space-charge-limited currents in a semi-insulating layer involved. By a capacitance measurement with reverse bias voltage the semi-insulating layer is found to be usually 1 µm in thickness. Values of depths and densities for hole traps which can be determined from the analysis of the dependence of the space-charge-limited currents on applied voltage in this layer are 0.13∼0.17 eV and 1016∼1017 cm-3, respectively. Both electrical and optical properties are in accord with a band model having a metal (indium)-semi-insulator (indium+ZnTe)-semiconductor (ZnTe) structure.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.