Effect of different calcination temperatures and post annealing on the properties of 1,3 propanediol based Sol-Gel (Na0.5K0.5)NbO3 (NKN) thin films

► Beneficial effect of post annealing treatment on diol based NKN film was shown. ► Single phase, pore and crack free films were fabricated. ► Effect of a post annealing step on the ferroelectric properties was shown. ► Films with high Ec and high Pr were fabricated with post annealing treatment. ► Low leakage currents were achieved with post annealing treatment.