Temperature dependent currentvoltage characteristics of the Zn/ZnO/n-Si/AuSb structure with ZnO interface layer grown on n-Si substrate by SILAR method
This is the first time; it was employed Successive Ionic Layer Adsorption and Reaction (SILAR) method in order to prepare Zn/ZnO/n-Si/AuSb sandwich structure. The ZnO interface layer was directly formed on n-type Si substrate using SILAR method. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) studies were showed that the film is covered well on n-type Si substrate and have polycrystalline structure. An AuSb electrode was used as an ohmic contact. The Zn/ZnO/n-Si/AuSb sandwich structure demonstrated clearly rectifying behavior by the currentvoltage (IV) curves studied at room temperature. The sample temperature effect on the currentvoltage (IV) characteristics of Zn/ZnO/n-Si/AuSb structure was investigated in temperature range 80320K by steps of 20K. The parameters such as barrier height, ideality factor and series resistance of this structure were calculated from the forward bias IV characteristics as a function of sample temperature. It was seen that the ideality factor and series resistance were decreased; the barrier height were increased with increasing temperature. The experimental values of barrier height and ideality factor for this device were calculated as 0.808eV and 1.519 at 320K; 0.220eV and 4.961 at 80K, respectively. These abnormal behaviors can be explained by the barrier inhomogeneities at the metalsemiconductor (MS) interface.
zno interface layer silar sandwich structure barrier inhomogeneity