Fig. 5: Characterization of piezoelectric properties in (HaaOH)BF4. | Nature Communications

Fig. 5: Characterization of piezoelectric properties in (HaaOH)BF4.

From: Enhancement of phase transition temperature through hydrogen bond modification in molecular ferroelectrics

Fig. 5

a Diagram of the piezoelectric coefficient d33 of the (HaaOH)BF4 crystal along the [001] direction using the quasi-static method. b Schematic illustration of piezoelectric energy-harvesting devices. c Generated VOC of energy-harvesting devices based on (HaaOH)BF4 and (Haa)BF4 polycrystalline samples under a periodical vertical force of 17 N at a frequency of 10 Hz, and the VOC of the device without samples under the same conditions. d VOC of the (HaaOH)BF4 energy-harvesting device under forward (blue line) and reverse (red line) electrical connections. e VOC of the energy-harvesting device containing (HaaOH)BF4 with different periodical vertical forces applied (3, 13, 22, and 31 N) at a frequency of 10 Hz. f Linear fitting of the VOC of the (HaaOH)BF4 energy-harvesting device as a function of the applied force.

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