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Get Free AccessWe demonstrated the energy harvesting potential and piezotronic effect in vertically aligned CdSe nanowire (NW) arrays for the first time. The CdSe NW arrays were grown on a mica substrate by the vapor-liquid-solid process using a CdSe thin film as seed layer and platinum as catalyst. High-resolution transmission electron microscopy image and selected area electron diffraction pattern indicate that the CdSe NWs have a wurtzite structure and growth direction along (0001). Using conductive atomic force microscopy (AFM), an average output voltage of 30.7 mV and maximum of 137 mV were obtained. To investigate the effect of strain on electron transport, the current-voltage characteristics of the NWs were studied by positioning an AFM tip on top of an individual NW. By applying normal force/stress on the NW, the Schottky barrier between the Pt and CdSe was found to be elevated due to the piezotronic effect. With the change of strain of 0.12%, a current decreased from 84 to 17 pA at 2 V bias. This paper shows that the vertical CdSe NW array is a potential candidate for future piezo-phototronic devices.
Yusheng Zhou, Kai Wang, Weihua Han, Satish Chandra, Yan Zhang, Yong Ding, Caofeng Pan, Fang Zhang, Weilie Zhou, Zhong Lin Wang (2012). Vertically Aligned CdSe Nanowire Arrays for Energy Harvesting and Piezotronic Devices. , 6(7), DOI: https://doi.org/10.1021/nn3022074.
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Type
Article
Year
2012
Authors
10
Datasets
0
Total Files
0
Language
en
DOI
https://doi.org/10.1021/nn3022074
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