Experimental study demonstrates robust ferroelectric performance in lead-free KNN thin films, suggesting strong viability for sustainable energy harvesting.
The present work investigates the structural, electrical, and ferroelectric properties of KxNa1-xNbO3 thin films at morphotropic phase boundary [KNN-50 (x = 0.50)]. RF magnetron sputtering was used to deposit the KNN thin films under optimized deposition parameters X-ray diffraction (XRD) technique and UV-Visible spectroscopy were used to analyze the structural and optical properties of the grown thin films respectively. The electrical studies of KNN thin film were carried out in the metal-insulator-metal (MIM) configuration. Well-saturated polarization versus electric field hysteresis loop with high value of remnant polarization was obtained on the KNN film, confirming its ferroelectric nature. The outcomes are encouraging to use KxNa1-xNbO3 thin films in ferroelectric and nonlinear optical applications.
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Sharma et al. (2025) studied this question.
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