High-performance piezoelectric nanogenerators composed of formamidinium lead halide perovskite nanoparticles and poly(vinylidene fluoride)

A Flexible Lead‐Free BaTiO3/PDMS/C Composite Nanogenerator as a Piezoelectric Energy Harvester

“…[18][19][20][21][22] Piezoelectric nanocomposites composedo fp iezoelectric NPs and flexible polymers have demonstrated remarkable flexibility when used in flexible devices and wearable applications. [23][24][25][26][27] For example,K im [28] reported the silk-fibroin-based biodegradable piezoelectric composite nanogenerators using lead-free ferroelectric nanoparticles (BaTiO 3 ,Z nSnO 3 ,B i 0.5 (Na 0.82 K 0.18 ) 0.5 TiO 3 ,a nd K 0.5 Na 0.5 Nb 0.995 Mn 0.005 O 3 ), which could obtain maximum output voltages and current densities of 2.2 Va nd 0.12 mAcm À2 .S hin [29] reported high-performance flexible NGs based on ac omposite thin film composed of hemispherically aggregated BaTiO 3 NPs and poly-(vinylidene fluoride-co-hexafluoropropene) P(VDF-HFP), whiche xhibited high electricalo utput up to 5Vand 750 nA by cyclic measurementu nder bending. Park [30] reported an anocomposite generator (NCG) that achived as imple, low-cost, and large area fabrication based on BaTiO 3 NPs synthesized via ah ydrothermal reaction and graphitic carbons (such as singlewalled and multiwalled carbon nanotubes and reduced graphene oxide), which repeatedly generateda no pen-circuit voltage (V oc )o fa pproximately 3.0 Va nd as hort-circuit current signal of 300 nA.…”

Halide Perovskites for Applications beyond Photovoltaics

“…For example, the piezoelectric coefficient decreased by replacing I with Cl or Br because the covalent bond strength between Pb and X is reduced . A typical piezoelectric energy generator and its working mechanism are described in Figure …”

P‐111: Self‐Driven Light‐Emitting Diodes Based on Formamidinium Lead Halide Perovskite Nanocrystals

“…Organic-inorganic metal halide perovskite semiconductor has a cubic structure which can intrigue response of ferroelectric polarizations [12][13][14]. Metal halide perovskite has been reported as a new kind of piezoelectric material, which has potential applications in self-powered sensors, nanogenerators, actuators and energy harvesting devices [15][16][17]. Perovskite MAPbI 3 has been demonstrated the applications of polarization switching and light-enhanced piezoelectricity [18].…”

“…Beyond that, the FA cationbased perovskite nanostructures display prominent piezoelectric activity. The piezoelectric power output can be remarkably enhanced through a piezoelectric composite nanogenerator, which is achieved by combining FAPbBr 3 nanocrystals and poly(vinylidene fluoride) (PVDF) polymer [15]. The reported FAbased piezoelectric nanogenerators show the highest outputs and current density of 30 V and 6.2 μA cm -2 ， respectively.…”