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Study of density of localized states in a-Ga x Se100-x alloysusing SCLC measurements
M. Husain,Shagufta B. Husain,M. Zulfequar,M.A. Majeed Khan 한국물리학회 2004 Current Applied Physics Vol.4 No.5
DC conductivity measurements have been made as a function of temperature and electric eld on a-GaxSe100-x (0≤x≤10)samples, in order to study the eect of the electric eld and temperature on the conduction mechanism. The present paper reports themeasurements on space charge limited conduction (SCLC) in vacuum evaporated amorphous thin lms of a-GaxSe100-x where 0≤x≤10. At high fields (~10⁴V/cm), the current could be tted to the theory of space charge limited conduction, in case ofuniform distribution of localized states in the mobility gap of these materials. The addition of Gallium (Ga) in a-GaxSe100-x results in an increase in the density of localized states and hence an increase in conductivity.