PHYSICAL PROPERTIES OF ZnO LAYERS PREPARED ON Si SUBSTRATES BY HYDROTHERMAL METHOD

Simion RAEVSCHI, Leonid GORCEAC, Vasile BOTNARIUC, Tudor BRANIȘTE*, Sergiu VATAVU Universitatea de Stat din Moldova *Universitatea Tehnică a Moldovei

Abstract

The nucleation and proper ZnO thin layers on Si substrates were synthesized by the hydrothermal method from the solutions of zinc compounds by using different solvents such as: water, water + ethanol, water + methanol, water + propanol, water + acetone, ethanol, propanol, methanol. Dehydrated zinc acetate, Zn(CH3COO)2·2H2O, was used for the preparation of ZnO nucleation layers . The deposition of the proper ZnO layers on the nucleated structures is carried out by boiling them in the Zn(NO3)2 + KOH aqueous solution. The structural and morphological characterisations of the obtained buffer layers are given in the paper. The efficiency of ZnO buffer layer used in the preparation of GaN layers is demonstrated as well. Keywords: ZnO, buffer, hydrothermal method.