Research progress of piezoelectric nanogenerators and their hybrid devices

Abstract

The energy crisis and environmental pollution from excessive use of traditional fossil fuel have been prompting a number of researchers and institutes to develop new technology, emerging mat-erials, and potential applications for green, sustainable and renewable power source. There is a rich source of energy in the environment and therefore it is very promising to collect energy from the envir-onment. The mechanical energy can be transformed into electric energy when the piezoelectric material experiences mechanical deformation due to the transfer of internal electron. Therefore, as a potential sustainable, green energy source, piezoelectric nanogenerator has received extensive attention in rec-ent years. Some research achievements in recent years were reviewed in this paper, starting from the classification of piezoelectric materials and combining with their preparation methods, structure and properties. The effects of different preparation methods and structures on piezoelectric properties of piezoelectric nano-generators were evaluated in detail. The future development was also prospected.

Keywords

• piezoelectric nanogenerator
• piezoelectric semiconductor
• piezoelectric ceramics
• piezoel-ectric polymer
• hybrid device