Peculiarities of dynamic pyroelectric response of spin-coated corona-charged P(VDF/TrFE) polymer films

Abstract

Dynamic pyroelectric response of spin coated corona charged P(VDF/TrFE) copolymer films and commercial P(VDF/TrFE) films has been studied in a wide range of frequencies of radiation flux modulation. Investigation has been concentrated on the films with non-uniform distribution of pyroactivity through the film thickness. A low frequency pyroelectric resonance discovered earlier in commercially available PVDF films of various production has not been observed in the spin coated corona charged films and was weak pronounced in the commercial P(VDF/TrFE) copolymer films from 'Piezotech'. Results are explained with the assumption of significant role of prior stressed state in the polymer films for occurrence of pyroelectric resonance phenomena. Advantages of spin coated corona charged films for pyroelectric applications are discussed.