Power-generation performance of lead-free (K,Na)NbO3 piezoelectric thin-film energy harvesters

(K,Na)NbO3 Nanofiber-based Self-Powered Sensors for Accurate Detection of Dynamic Strain

“…18,19 For example, Kanno and co-authors have reported that the performance of energy harvester based on KNN thin films is comparable to that of Pb(Zr,Ti)O 3 (PZT) thin films. 20 Our previous works also demonstrated that the output voltage generated by a single KNN nanorod was much higher than that of individual ZnO nanowires. 21,22 Recently, flexible piezoelectric nanogenerators based on Mn-doped KNN nanofibers was reported by Kang and co-authors.…”

Piezoelectric properties of (K0.5Na0.5)NbO3-BaTiO3lead-free ceramics prepared by spark plasma sintering

“…[2][3][4] Up to present, a lot of research papers on KNNbased lead-free piezoelectric ceramics have been published, including the piezoelectric properties, [5][6][7] the energy-storage properties, 8 etc. In order to further improve the piezoelectric properties of KNN, engineering of the polymorphic phase transition (PPT) between tetragonal and orthorhombic phases, i.e., shifting downward the PPT point T OÀT to ambient temperature through chemical modifications, 9 has been employed, represented by the formation of pseudobinary solid solutions between KNN and one additional component, e.g., KNN-LiTaO 3 , 10-14 KNN-LiSbO 3 15-17 KNN-BiFeO 3 18 and so on.…”

Piezoelectric MEMS for energy harvesting

“…75 Kanno et al have compared the energy harvesting performance of KNN thin fi lms with PZT thin fi lms by using simple unimorph Si-cantilevers. 76 The piezoelectric coeffi cient of both KNN and PZT fi lms showed almost the same value of e 31,f = −10 C/m 2 . 77 The relative dielectric constants of the KNN and PZT fi lms were 744 and 872, respectively.…”