Chemical structures of the investigated compounds abbreviated as M6R8, M6R14n (monomers), PM6R8, and PM6R14n (polymers).
Pyroelectric chip 1: Al electrodes , 2: fused quartz support (5mm in thickness), and 3: circular sensing element.
Pyroelectric responses of investigated films. (a) Pyroelectric current vs frequency (current mode), 1: random copolymer of [P(VDF-TrFE), 70%:30%], , , and . 2: M-1, , , and . 3: polycrystalline guanidine nitrate , , , and . 4: M-2, , , and . Arrows show the positions of cutoff frequencies. Dot lines are the extrapolation of the pyroelectric current curve to high frequencies. (b) Pyroelectric voltage vs frequency squared (voltage mode) and load resistor . 1: random copolymer of [P(VDF-TrFE) 70%:30%], . 2: M-1, . 3: M-2, . Insert shows the low frequency mode.
Pyroelectric pulses 1: random copolymer of P(VDF-TrFE, 70%:30%), , 2: liquid crystalline composite M-1, . YAG laser, pulse duration and pulse power .
Pyroelectric responses vs temperature. (a) Homopolymer PM6R14n, , . (b) composite M-1, , and . Arrows show cooling and heating scans.
Phase transition temperatures for the investigated samples.
Dielectric and pyroelectric data of different materials (the units correspond to the most often used in literature).
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