Chun-Yuan Huang and Chiao-Yang Cheng and Chun-Yem Huang and Yan-Kuin Su and James Chin-Lung Fang
Efficiency Improvements of GaAsbased Solar Cells by Hydrothermallydeposited ZnO Nanostructure Array
657 - 661
2011
5
7
International Journal of Materials and Metallurgical Engineering
https://publications.waset.org/pdf/9135
https://publications.waset.org/vol/55
World Academy of Science, Engineering and Technology
ZnO nanostructures including nanowires, nanorods,
and nanoneedles were successfully deposited on GaAs substrates,
respectively, by simple twostep chemical method for the first time. A
ZnO seed layer was firstly precoated on the O2plasma treated
substrate by solgel process, followed by the nucleation of ZnO
nanostructures through hydrothermal synthesis. Nanostructures with
different average diameter (15250 nm), length (0.91.8 μm), density
(0.916×109 cm2) were obtained via adjusting the growth time and
concentration of precursors. From the reflectivity spectra, we
concluded ordered and taper nanostructures were preferential for
photovoltaic applications. ZnO nanoneedles with an average diameter
of 106 nm, a moderate length of 2.4 μm, and the density of 7.2×109
cm2 could be synthesized in the concentration of 0.04 M for 18 h.
Integrated with the nanoneedle array, the power conversion efficiency
of single junction solar cell was increased from 7.3 to 12.2,
corresponding to a 67 improvement.
Open Science Index 55, 2011