Dielectric, ferroelectric, and photoluminescent properties of Dy³⁺ doped flexible multifunctional PVDF films

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.

KEYWORDS:

• Polymer-matrix composites(PMCs)
• multifunctional composites
• ferroelectric property
• dielectric property
• photoluminescent property

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).