Maximizing piezoelectricity by self-assembled highly porous perovskite–polymer composite films to enable the internet of things

Abstract

<p>A high-performance perovskite/polymer piezoelectric nanogenerator for next generation self-powered wireless micro/nanodevices.</p>

Development of a piezoelectric nanogenerator based on mesoporous silica/zinc oxide hybrid nanocomposite fibres

“…The electroactive γ‐phase relative fractional content ( F [ γ ]) in the neat PHP and its composite fibre samples is calculated from Equation () 26 where A α and A γ are the absorbances at 764 and 832 cm −1 , respectively, and K α (0.3654 μm −1 ) and K γ (0.150 μm −1 ) are the absorption coefficients at the respective wavenumbers.…”

“…The electroactive γ-phase relative fractional content (F[γ]) in the neat PHP and its composite fibre samples is calculated from Equation (1). 26…”

Prospects of Metal‐Free Perovskites for Piezoelectric Applications

“…[ 85 ] Additionally, FAPbBr 2 I/PVDF nanocomposites designed as self‐powered integrated wireless electronic node (SIWEN) devices are shown in Figure 7b–e . [ 138 ] On the other hand, metal‐free perovskites can also possibly be explored due to non‐toxicity. According to the simulation results, MDABCO‐NH 4 X 3 series have large piezoelectric responses in the d x 5 direction, showing great potential in high power density PENGs to be integrated in Internet of Things (IoT) devices or physiological monitoring systems.…”

Recent advances in hybrid perovskite nanogenerators

“…In recent years, the self-assembled macroscopic porous structure was observed in FAPbBr 2 I-PVDF composite, which can significantly enhance the bulk strain of piezoelectric composite film leading to 5-fold enhancement in piezopotential. 79 The popular electrospinning technique allowing the production of micro or nanoscale fibers was sure to be used in the fabrication of perovskite-incorporated PVDF nanofibers with a resultant β-phase. On account of the superior electroactive properties of the MAPbI 3 -PVDF composite nanofibers ( Figure 3F), Sultana et al demonstrated a piezoelectric-pyroelectric PENG with output power densities of about 0.8 and 0.2 mW/m 2 under mechanical vibration and temperature fluctuation, respectively.…”

“…MAPbI 3 ‐PVDF PENGs were measured with predominant dielectric and ferroelectric properties, which exhibited output voltage and current density of ∼45.6 V and ∼4.7 μA/cm 2 , respectively. In recent years, the self‐assembled macroscopic porous structure was observed in FAPbBr 2 I‐PVDF composite, which can significantly enhance the bulk strain of piezoelectric composite film leading to 5‐fold enhancement in piezopotential 79 . The popular electrospinning technique allowing the production of micro or nanoscale fibers was sure to be used in the fabrication of perovskite‐incorporated PVDF nanofibers with a resultant β ‐phase.…”