Achieving Ultrahigh Piezoelectricity in Organic–Inorganic Vacancy-Ordered Halide Double Perovskites for Mechanical Energy Harvesting

Guangguang Huang (1) , Asif Abdullah Khan (1) , Md Masud Rana (1) , Chao Xu (1) , Shuhong Xu (2) , Resul Saritas (1) , Steven Zhang (1) , Eihab Abdel-Rahmand (1) , Pascal Turban (3) , Soraya Ababou-Girard (3) , Chunlei Wang (2, 4) , Dayan Ban (1)

1 University of Waterloo [Waterloo]
2 SEU - Nanjing Southeast University
3 IPR - Institut de Physique de Rennes
4 Henan University

Piezoelectric charge coefficient (d33) and piezoelectric voltage coefficient (g33) are the two most critical parameters that define output performance of piezoelectric nanogenerators (PNGs). Herein, we propose a vacancy-ordered double perovskite of TMCM2SnCl6 (where TMCM is trimethylchloromethylammonium) with a large d33 of 137 pC/N and g33 of 980 × 10–3 V·m/N. The piezoelectric coefficients are considered from the halogen-bonding-mediated synergistic movements of atomic displacement in inorganic [SnCl6]2– octahedrons, as well as the molecular rotation of organic TMCM+, which is revealed by a combined density functional theory (DFT) and experimental study. The TMCM2SnCl6 possesses a high saturated polarization (Ps) of 8.7 μC/cm2, a high Curie temperature (Tc) of 365 K, and a low coercive field (Ec) of 0.6 kV/cm. The output voltage (Voc) and current (Isc) of the PNGs are 81 V and 2 μA at an applied mechanical excitation of (4.9 N, 40 Hz). We hope this work will provide guidance in energy harvesting by innovatively designing highly piezoelectric perovskites for the PNGs.

Mots clés: Coating materials; Piezoelectrics; Crystal structure; Polarization; Perovskites

Domaines: Physique [physics]

Guangguang Huang, Asif Abdullah Khan, Md Masud Rana, Chao Xu, Shuhong Xu, et al.. Achieving Ultrahigh Piezoelectricity in Organic–Inorganic Vacancy-Ordered Halide Double Perovskites for Mechanical Energy Harvesting. ACS Energy Letters, 2021, 6 (1), pp.16-23. ⟨10.1021/acsenergylett.0c02200⟩. ⟨hal-03124235⟩