Photoluminescence ZnO crystals grown by electric current heating and thermite reaction

Abstract

Recently, it has been found by our group that the ZnO crystals grow on ZnO ceramic bar heated by electric current. The crystal shapes were related to the surrounding atmosphere and temperature during the growth. In this report, aluminum powder was placed on the ZnO ceramic bar. When a certain current run through the ceramic bar, a rod consisting of ZnO crystals grew from the aluminum powder. Photoluminescence spectra of obtained crystal rod were measured at room temperature (300 K) and low temperature (77 K).