Prospects of Metal-Free Perovskites for Piezoelectric Applications

Han Song Wu, Bayu Tri Murti, Jitendra Singh, Po Kang Yang, Meng Lin Tsai

Research output: Contribution to journalArticlepeer-review

Abstract

Metal-halide perovskites have emerged as versatile materials for various electronic and optoelectronic devices such as diodes, solar cells, photodetectors, and sensors due to their interesting properties of high absorption coefficient in the visible regime, tunable bandgap, and high power conversion efficiency. Recently, metal-free organic perovskites have also emerged as a particular class of perovskites materials for piezoelectric applications. This broadens the chemical variety of perovskite structures with good mechanical adaptability, light-weight, and low-cost processability. Despite these achievements, the fundamental understanding of the underlying phenomenon of piezoelectricity in metal-free perovskites is still lacking. Therefore, this perspective emphasizes the overview of piezoelectric properties of metal-halide, metal-free perovskites, and their recent progress which may encourage material designs to enhance their applicability towards practical applications. Finally, challenges and outlooks of piezoelectric metal-free perovskites are highlighted for their future developments.

Original languageEnglish
Article number2104703
JournalAdvanced Science
Volume9
Issue number12
DOIs
StatePublished - 25 Apr 2022

Keywords

  • metal-free perovskites
  • piezoelectric devices
  • piezotronics
  • symmetry breaking

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