Al-doped ZnO powdered materials: Al solubility limit and IR absorption properties

Hélène Serier (1) , Manuel Gaudon (1) , Michel Ménétrier (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

Al-doped ZnO powder was synthesized via the Pechini route with a doping rate varying from 1 to 4 mol.%. A solubility limit has been estimated under 0.3 mol.% of Al using X-ray diffraction refinements. The incorporation of aluminium into the ZnO lattice was investigated by ²⁷Al NMR, which suggests an extremely low amount of Al in a distribution of sites in ZnO. In order to assess the impact of such a low dopant amount, diffuse reflection experiments were performed for a wavelength range from 200 to 2500 nm. If the effect of doping was negligible for samples prepared at 850 °C, annealing at 1200 °C clearly reveals enhanced IR absorption properties for the doped samples, which are similar whatever be the nominal Al content.

Mots clés: Zinc oxide; Powder; Diffuse reflection; IR absorption; ²⁷Al MAS NMR

Domaines: Matériaux

Hélène Serier, Manuel Gaudon, Michel Ménétrier. Al-doped ZnO powdered materials: Al solubility limit and IR absorption properties. Solid State Sciences, 2009, 11 (7), pp.1192-1197. ⟨10.1016/j.solidstatesciences.2009.03.007⟩. ⟨hal-00408170⟩