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    PIEZOELECTRIC FILM
    1.
    发明公开
    PIEZOELECTRIC FILM 审中-公开

    公开(公告)号：EP4102857A1

    公开(公告)日：2022-12-14

    申请号：EP21751010.6

    申请日：2021-01-12

    申请人： FUJIFILM Corporation

    发明人： TAMADA, Yoshinori

    IPC分类号： H04R17/00 ,  H01L41/09 ,  H01L41/18 ,  H01L41/257 ,  H01L41/313 ,  H01L41/317

    摘要： An object of the present invention is to provide a piezoelectric film capable of realizing an electroacoustic conversion film or the like in which the durability is high and a sufficient sound pressure with respect to an input operating voltage is obtained. The object is achieved by providing a piezoelectric film including a polymer-based piezoelectric composite material which contains piezoelectric particles in a matrix containing a polymer material, and electrode layers which are provided on both surfaces of the polymer-based piezoelectric composite material, in which in a case where a cross section of the film in a thickness direction is observed with a scanning electron microscope, the polymer-based piezoelectric composite material is divided into ten equal regions in the thickness direction, area ratios of the piezoelectric particles in two most distant regions are measured, and the area ratio of the piezoelectric particles in the region with a lower area ratio is set as 1, the area ratio of the piezoelectric particles in the region with a higher area ratio is 1.2 or greater.

    1D/2D HYBRID PIEZOELECTRIC NANOGENERATOR AND METHOD FOR MAKING SAME
    5.
    发明公开
    1D/2D HYBRID PIEZOELECTRIC NANOGENERATOR AND METHOD FOR MAKING SAME 审中-公开

    公开(公告)号：EP3579290A1

    公开(公告)日：2019-12-11

    申请号：EP19178284.6

    申请日：2019-06-04

    申请人： Shimco North America Inc.

    发明人： Mahmud, Alam ,  Khan, Asif Abdullah ,  Ban, Dayan ,  Voss, Peter

    IPC分类号： H01L41/18 ,  H01L41/113 ,  H01L41/39 ,  H01L41/31 ,  H01L41/317 ,  H02N1/04

    摘要： The present invention relates to a piezoelectric nanogenerator (PENG) that is capable of harvesting mechanical energy into electricity. The PENG comprises one dimensional (1D) and two dimensional (2D) nanostructures integrated together to form a composite nanostructure. A major advantage of the present invention is that the composite nanostructure provides enhanced electrical output and enhanced mechanical stability as compared to previously reported 1D or 2D nanostructures alone. Also described is a hybrid nanogenerator that combines the PENG with a triboelectric nanogenerator (TENG). A method of synthesizing the composite nanostructure PENG, in which the 1D and 2D nanostructures are grown together on the same substrate using a low temperature hydrothermal method is also described. The provided method is simple and cost-effective.