Recent progress in microstructure development of inorganic one-dimensional nanostructures for enhancing performance of piezotronics and piezoelectric nanogenerators

Kapil Gupta, Sanjaya Brahma, Jit Dutta, Bruno Rao, Chuan Pu Liu

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

Abstract

Self-powered nanodevices are highly desirable for green energy technology, internet of things, wearable devices, sensors, and implanted biomedical devices. In this aspect, piezoelectric nanogenerators (PENGs) that involve energy harvest from mechanical vibrations and piezotronic effect enhanced various sensors, including strain sensor, gas sensor, humidity sensor, pressure sensor, and bio sensors are highly attractive, prompting a rapid surge in research on enhancing their performance. Due to the lack of inversion symmetry in wurtzite materials, external stress induced piezoelectric potential (piezopotential) is a well-known mechanism behind energy harvesting. By the coupling of semiconducting and piezoelectric properties, the resulting piezopotential can effectively tune the Schottky barrier height (SBH) at the interfaces of the devices, which can act as the virtual gate to modulate the carrier transportation in various electronic devices. In order to enhance the performances of piezotronics devices and PENGs, one of the main approaches is to search for new materials with higher piezoelectric coefficients. However, development of new materials is often impeded by available synthesis techniques. Alternatively, enhancing the piezoelectric properties of most common wurtzite piezoelectric semiconductors by microstructure modification is considered to be a viable approach. For this purpose, several strategies have been demonstrated to enhance the performances of piezotronics and PENGs, such as, surface modification, doping, altering orientation and aspect ratio of 1D nanostructures, etc. In this review, we systematically analyze the current developments in enhancing the performance of piezotronics and PENGs by microstructure modification of 1D nanostructures.

Original languageEnglish
Pages (from-to)1-21
Number of pages21
JournalNano Energy
Volume55
DOIs
Publication statusPublished - 2019 Jan

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science
  • Electrical and Electronic Engineering

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