Control of orientation and electrical conductivity of doped ZnO films using a layered double hydroxide nanoparticle precursor and spark plasma sintering process

摘要

Sols with dispersions of Zn-Al layered double hydroxide particles and ZnO particles were prepared by heating aqueous solutions of Zn(NO_3)_2 and Al(NO_3)_3 with ethylenediamine and hexamethylenediamine at 348 K for 24 h. The shapes of the obtained particles depend on the diamines used. Thin films were obtained by drying the sols on an alkali-free glass substrate. Firing the obtained films at temperatures higher than 573 K produced oriented ZnO films. Spark plasma sintering of the films lowered their surface resistance.