ABSTRACT
Dy3+ doped flexible multifunctional poly(vinylidene fluoride) (PVDF) films was prepared by solution casting method. The composite films were characterized by IR, XRD, TG, DSC, SEM, photoluminescene, dielectric and ferroelectric tests. The results indicated that Dy(NO3)3•6H2O could be homogeneously dispersed into PVDF matrix to form β-phase dominated composite films without obvious agglomeration. The existence of Dy(NO3)3•6H2O influenced β-phase content and crystallinity. The solid photoluminescent emission spectra showed two Dy3+ characteristic peaks at 480 and 571 nm, and the intensity was tunable according to Dy3+ salt content. The introduction of Dy3+ salt could improve the dielectric and ferroelectric properties of composite films.
Funding
This work was supported by National Natural Science Foundation of China (21361012, 21661016, 21461012 and 21461013), the Young Scientists Training Program of Jiangxi Province (20144BCB23038), Department of Education of Jiangxi Province (GJJ160734) and Undergraduate Training Programs for Innovation and Entrepreneurship (201710419006).