Nonlinear effect of carrier drift on the performance of an n-type ZnO nanowire nanogenerator by coupling piezoelectric effect and semiconduction.

Beilstein Journal of Nanotechnology
Yuxing LiangYuantai Hu

Abstract

In piezoelectric semiconductors, electric fields drive carriers into motion/redistribution, and in turn the carrier motion/redistribution has an opposite effect on the electric field itself. Thus, carrier drift in a piezoelectric semiconducting structure is essentially nonlinear unless the induced fluctuation of carrier concentration is very small. In this paper, the nonlinear governing equation of carrier concentration was established by coupling both piezoelectric effect and semiconduction. A nonlinear carrier-drift effect on the performance of a ZnO nanogenerator was investigated in detail and it was elucidated that carrier motion/redistribution occurs in the ZnO nanowire (ZNW) cross section while there is no carrier motion in the axial direction. At the same time, we noted that the amplitude of boundary electric charge grows with increasing deformation, but the peaks of boundary electric charge do not appear at the cross-section endpoints. Thus, in order to effectively improve the performance of the ZNW nanogenerator, the effect of electrode configuration on the piezoelectric potential difference and output power was analyzed in detail. The electrode size for the optimal performance of a ZnO nanowire generator was proposed....Continue Reading

References

Jun 22, 2002·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Jiashi S Yang, Huiyu Y Fang
Apr 15, 2006·Science·Zhong Lin Wang, Jinhui Song
Feb 15, 2008·Nature·Yong QinZhong Lin Wang
Jan 3, 2009·Nature Nanotechnology·Rusen YangZhong Lin Wang
Mar 30, 2010·Nature Nanotechnology·Sheng XuZhong Lin Wang
Aug 12, 2010·Nano Letters·Guang ZhuZhong Lin Wang
May 12, 2011·Advanced Materials·Yan ZhangZhong Lin Wang
May 23, 2014·Nano Letters·Rinaldo TrottaArmando Rastelli
Jul 9, 2014·Scientific Reports·Vikrant J Gokhale, Mina Rais-Zadeh

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Methods Mentioned

BETA
atomic force microscopy
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