A high performance PZT ribbon-based nanogenerator using graphene transparent electrodes

• Published in: Energy & environmental science Vol. 5; no. 10; pp. 8970 - 8975
• Main Authors: Kwon, Junggou, Seung, Wanchul, Sharma, Bhupendra K, Kim, Sang-Woo, Ahn, Jong-Hyun
• Format: Journal Article
• Language: English
• Published: 01.10.2012
• Subjects: Current density; Density; Electric potential; Electrodes; Graphene; Lead zirconate titanates; Liquid crystal displays; Nanostructure
• ISSN: 1754-5692; 1754-5706
• DOI: 10.1039/c2ee22251e

We report a simple and effective approach for high performance PbZr sub(0.52)Ti sub(0.48)O sub(3) (PZT) based flexible and semi-transparent NGs that exploit the electrical, mechanical and transparent properties of graphene. PZT NGs are successfully demonstrated for continuous driving of a liquid crystal display screen and a light emitting diode. A good quality PZT film was deposited on Pt/Ti/SiO sub(2)/Si wafer by the sol-gel method, exhibiting a typical hysteresis loop in the low voltage region. A graphene film was used in the interdigitated electrode form to improve the PZT/graphene interface under mechanical stress. Further improvement in NGs performance was realized by p-type doping in graphene, resulting in an increase in current density. NGs showed a high output voltage similar to 2 V, current density similar to 2.2 mu A cm super(-2) and power density similar to 88 mW cm super(-3) at an applying force of 0.9 kgf. This can efficiently run commercially available electronic components in a self-powered mode, without any external electrical supply.