Influence of Crystallization Time on Energy-Storage Density and Efficiency of Lead-Free Bi_0.5(Na_0.8K_0.2)_0.5TiO₃ Thin Films

Table 1

The grain size and roots mean square roughness as a function of the annealing time.

Annealing time (min)	10	20	40	60
Grain size, D (nm)	44.9	47.2	49.1	49.7
Roots mean square roughness, (nm)	5.5	4.8	4.6	3.8