Figure 4From: Formation of Nb2O5 matrix and Vis-NIR absorption in Nb-Ge-O thin filmCompositional plane of the crystal structure in Nb-Ge-O thin films. Squares indicate phase mixture of Nb2O5 and GeO2, triangles indicate phase mixture of Nb2O5 and NbO2, black dots indicate single-phase Nb2O5, and red dots indicate phase mixture of Ge and Nb2O5.Back to article page