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Piezoelectric 2D materials for bistable NEMS energy harvesters

Published online by Cambridge University Press:  22 May 2014

Miquel López-Suárez ,
Miguel Pruneda ,
Riccardo Rurali  and
Gabriel Abadal
Miquel López-Suárez
Affiliation:
Departament d'Enginyeria Electrònica, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
Miguel Pruneda
Affiliation:
ICN2 - Institut Català de Nanociència i Nanotecnologia, Campus UAB, 08193 Bellaterra Barcelona, Spain Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) Campus de Bellaterra, 08193 Bellaterra, Barcelona, Spain
Riccardo Rurali
Affiliation:
Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) Campus de Bellaterra, 08193 Bellaterra, Barcelona, Spain
Gabriel Abadal
Affiliation:
Departament d'Enginyeria Electrònica, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain
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Abstract

The dynamics of one atom thick h-BN suspended nanoribbons have been obtained by first performing ab-initio calculations of the deformation potential energy and then solving numerically a Langevine type equation to explore their use as energy harvesting devices. Similarly to our previous proposal for a graphene-based harvester1, an applied compressive strain is used to drive the clamped-clamped nanoribbon structure into a bistable regime, where quasi-harmonic vibrations are combined with low frequency swings between the minima of a double-well potential. h-BN, graphene and MoS2 similar structures have been compared in terms of the static response to a compressive strain and of the dynamic evolution induced by an external noisy vibration. Due to its intrinsic piezoelectric response, the mechanical harvester naturally provides an electrical power that is readily available or can be stored by simply contacting the monolayer at its ends. Engineering the induced non-linearity, the proposed device is predicted to harvest an electrical root mean square (rms) power of more than 180 fW when it is excited by a noisy external force characterized by a white Gaussian frequency distribution with an intensity in the order of Frms=5pN.

Keywords

piezoelectricenergy generationmicroelectro-mechanical (MEMS)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1701: Symposium NN – Dislocation Plasticity , 2014 , mrss14-1701-nn03-29
Copyright
Copyright © Materials Research Society 2014 

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References

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