title: Pyroelectric nanogenerators for driving wireless sensors.
abstract: We demonstrate a pyroelectric nanogenerator (PENG) based on a lead zirconate titanate (PZT) film, which has a pyroelectric coefficient of about -80 nC/cm(2)K. For a temperature change of 45 K at a rate of 0.2 K/s, the output open-circuit voltage and short-circuit current density of the PENG reached 22 V and 171 nA/cm(2), respectively, corresponding to a maximum power density of 0.215 mW/cm(3). A detailed theory was developed for understanding the high output voltage of PENG. A single electrical output pulse can directly drive a liquid crystal display (LCD) for longer than 60 s. A Li-ion battery was charged by the PENG at different working frequencies, which was used to drive a green light-emitting diode (LED). The demonstrated PENG shows potential applications in wireless sensors.
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.
authors.forename: Ya
authors.initials: Y
authors.lastname: Yang
authors.forename: Sihong
authors.initials: S
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhang
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang
mesh_terms: D011211:Electric Power Supplies; D004867:Equipment Design; D007854:Lead / Q000737:chemistry; D050866:Liquid Crystals / Q000737:chemistry; D036103:Nanotechnology / Q000295:instrumentation*; D014025:Titanium / Q000737:chemistry; D059015:Wireless Technology / Q000295:instrumentation; D015040:Zirconium / Q000737:chemistry
chemical_list: C065536:lead titanate zirconate; D007854:Lead; D015040:Zirconium; D014025:Titanium