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ZnO Nanostructured Diodes - Enhancing Energy Generation through Scavenging Vibration

Published online by Cambridge University Press:  18 June 2013

Joe Briscoe ,
Nimra Jalali ,
Leonard Loh ,
Safa Shoaee ,
Peter Wooliams ,
Mark Stewart ,
Markys Cain ,
Paul M. Weaver ,
James R. Durrant  and
Steve Dunn
Joe Briscoe
Affiliation:
Centre for Materials Research, School of Engineering and Materials, Queen Mary University of London, E1 4NS, UK.
Nimra Jalali
Affiliation:
Centre for Materials Research, School of Engineering and Materials, Queen Mary University of London, E1 4NS, UK.
Leonard Loh
Affiliation:
School of Engineering, Nanyang Polytechnic, 180 Ang Mo Kio Avenue 8, Singapore 569830.
Safa Shoaee
Affiliation:
Centre for Plastic Electronics, Department of Chemistry, Imperial College London, London SW7 2AZ, UK.
Peter Wooliams
Affiliation:
National Physical Laboratory, Hampton Road, Teddington TW11 0LW, UK
Mark Stewart
Affiliation:
National Physical Laboratory, Hampton Road, Teddington TW11 0LW, UK
Markys Cain
Affiliation:
National Physical Laboratory, Hampton Road, Teddington TW11 0LW, UK
Paul M. Weaver
Affiliation:
National Physical Laboratory, Hampton Road, Teddington TW11 0LW, UK
James R. Durrant
Affiliation:
Centre for Plastic Electronics, Department of Chemistry, Imperial College London, London SW7 2AZ, UK.
Steve Dunn
Affiliation:
Centre for Materials Research, School of Engineering and Materials, Queen Mary University of London, E1 4NS, UK.
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Abstract

Recent developments on the use of the piezoelectric effect in ZnO nanorod-based p-n junctions for energy harvesting applications are presented. Two types of junctions are used. The first is a hybrid p-n device combining the semiconducting polymer poly(3,4-ethylene-dioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) with ZnO nanorods. The second type of junction is an all-inorganic junction between n-type ZnO nanorods and p-type CuSCN. It is shown that both these diodes can be produced on flexible plastic substrates, which generate a voltage output when bent. The voltage output of the ZnO/PEDOT:PSS diodes are measured across a range of resistive loads while bending to find a maximum power point of 12 μWcm-2 at 4 kΩ. It is shown that a voltage output is also generated when this structure is vibrated acoustically. The ZnO/CuSCN diode is sensitized to sunlight with a Ru-based dye to form a photovoltaic device. It is shown that the device efficiency can be increased by application of acoustic vibrations. This is attributed to the electric field generated by the piezoelectric effect in ZnO affecting the charge-carrier recombination at the ZnO surface.

Keywords

piezoelectricZnenergy storage
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1556: Symposium W – Piezoelectric Nanogenerators and Piezotronics , 2013 , mrss13-1556-w04-01
Copyright
Copyright © Materials Research Society 2013 

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