Please use this identifier to cite or link to this item: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/3057
Title: Microscopic Origin of Piezoelectricity in Lead- Free Halide Perovskite: Application in Nanogenerator Design
Authors: Pandey, Richa
Gangadhar, S.B.
Grover, Shivani
SINGH, SACHIN KUMAR
Kadam, Ankur
OGALE, SATISHCHANDRA
Waghmare, Umesh V.
Rao, V. Ramgopal
Kabra, Dinesh
Dept. of Physics
Keywords: Hybrid Perovskites
High-Performance
Solar Cells
TIN
CH3NH3PBI3
Nanowire
Piezoresponse
Nanocomposite
Nanoparticles
Generator
2019
Issue Date: Mar-2019
Publisher: American Chemical Society
Citation: ACS Energy Letters, 4(5), 1004-1011.
Abstract: In this work, we report a lead-free hybrid halide perovskite system with a very high piezoelectric charge density for applications in nanogenerators. We use materials engineering by incorporation of formamidinium tin iodide, FASnI3, in a soft polymer (polyvinylidene fluoride, PVDF) matrix and demonstrate high-performance large-area flexible piezoelectric nanogenerators. This is achieved by using self-poled thin films of a FASnI3:PVDF nanocomposite. The fabricated devices show an output voltage up to ∼23 V and power density of 35.05 mW cm–2 across a 1 MΩ resistor, under a periodic vertical compression, with a release pressure of ∼0.1 MPa. Measured values of the local piezoelectric coefficient (d33) of these films reach up to 73 pm/V. We provide the microscopic mechanism using first-principles calculations, which suggest that a soft elastic nature and soft polar optic phonons are responsible for the high piezoelectric response of FASnI3. Our studies open up a route to high-performance nanogenerators using a lead-free organic–inorganic halide perovskite family of materials.
URI: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/3057
https://doi.org/10.1021/acsenergylett.9b00323
ISSN: 2380-8195
Appears in Collections:JOURNAL ARTICLES

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