Piezoelectric energy harvesting of a bismuth halide perovskite stabilised by chiral ammonium cations

Abstract

Lead-free hybrid perovskite piezoelectrics have gained enormous attention due to their nontoxic metal content and notable physical properties. In this work, we report a bismuth-bromide-based perovskite-structured material stabilized by chiral...

Bismuth‐Based Chiral Perovskite with Different Dimensions for Second‐Order Nonlinear Optical Properties

“…These materials show sharp absorption peaks in the ultraviolet spectral region. [40,41] Their optical bandgaps have been further estimated using a Tauc plot, which is described as…”

“…These materials show sharp absorption peaks in the ultraviolet spectral region. [ 40,41 ] Their optical bandgaps have been further estimated using a Tauc plot, which is described as $$\[ \begin{array}{*{20}{c}}{{{\left( {\alpha hv} \right)}^2} = \;A\left( {hv - {E_g}} \right)}\end{array} \]$$where α is the optical absorption coefficient, hv is the photon energy, A is a constant, and E g is the optical energy gap of the material. The bandgaps of (R‐MBA) 4 Bi 2 Br 10 and (S‐MBA) 4 Bi 2 Br 10 are 2.68 and 2.72 eV, respectively.…”

Centimeter‐Sized Piezoelectric Single Crystal of Chiral Bismuth‐Based Hybrid Halide with Superior Electrostrictive Coefficient

“…The sign of d 22 (positive or negative) shown in Figure S8b,c, Supporting Information, is determined by the direction of b ‐axis of the clamped samples (upward or downward). Such a piezoelectric response is close to that of poly(vinylidene fluoride) (PVDF, ≈33 pC N −1 ) [ 24 ] and is much superior to that of other reported hybrid pnicogen‐based halides such as [( R )‐3‐hydroxy‐pyrrolidinium] 5 Sb 4 Br 17 (22 pC N −1 ), [ 25 ] [(CH 3 ) 3 S] 3 Bi 2 Br 9 (18 pC N −1 ), [ 26 ] [(CH 3 ) 3 NH] 3 Bi 2 I 9 (≈8 pC N −1 ), [ 27 ] [ s CH(MePh)(Me)NH 3 ][BiBr 5 ] (2.6 pC N −1 ), [ 28 ] as well as some traditional piezoelectric materials such as LiNbO 3 (21 pC N −1 ), [ 29 ] KTP (<26 pC N −1 ), [ 30 ] and alpha‐quartz (2.31 pC N −1 ). [ 31 ] Moreover, the poling process was not performed during the d 22 measurements, which is different from those piezoelectric ceramics such as perovskite oxides.…”

3D-printed polymer composite devices based on a ferroelectric chiral ammonium salt for high-performance piezoelectric energy harvesting

“…[1][2][3][4] Ferroelectric materials with embedded piezoelectric characteristics facilitate the interconversion between electric voltage and mechanical stimuli and are employed as mechanical energy harvesters, popularly known as piezoelectric nanogenerators (PENGs). 1,[5][6][7][8][9] PENGs are perceived to possess numerous applications in modern high-tech electronics and devices that function in the harvesting, storage, and dissipation of electrical energy. 10 In recent years, many PENGs derived from conventional ferro-and piezoelectric ceramics such as lead zirconate titanate, lithium niobate, zinc oxide, and barium titanate and polymers such as polyvinylidene fluoride (PVDF) have been explored, and commercially applied.…”