Fabrication of KNN Thin-Films via a Spin Coating Technique

Lead-free (K0.5 Na0.5)NbO3 (KNN) thin films were fabricated on FTO substrate using spin coating technique. Two types of additives were used to fabricate KNN thin films. The effect of different calcination temperatures on the structural and morphological properties of the KNN films was investigated by X-ray diffraction, scanning electron microscopy respectively. Low calcination temperatures led to decreasing the crystallite size. All films showed perovskite structure. The addition of additives plays an important role in the successful fabrication of KNN thin films.