Pyroelectric Response of Submicron Free-Standing Poly(vinylidene fluoride/trifluoroethylene) Copolymer Thin Films

作者：Kuroda Yusuke; Koshiba Yasuko; Misaki Masahiro; Ishida Kenji^*; Ueda Yasukiyo

来源：Applied Physics Express, 2013, 6(2): 021601.

DOI：10.7567/APEX.6.021601

Submicron-thick free-standing films of ferroelectric poly(vinylidene fluoride/trifluoroethylene) copolymer, P(VDF/TrFE), were fabricated and characterized for application in lead-free pyroelectric infrared sensors. The pyroelectric current and its responsivity were improved by the freestanding structure of the films owing to the reduced thermal capacity and suppression of thermal diffusion in the sensor element. The pyroelectric current for the 500-nm-thick free-standing film was about 20 times higher than that for a conventional %26quot;on-substrate%26apos;%26apos; P(VDF/TrFE) film element, and the thermal time constant for the 500-nm-thick free-standing film was shortened by 1/6 of that for a conventional %26quot;on-substrate%26apos;%26apos; P(VDF/TrFE) film element.

• 出版日期2013-2