Fabrication and Photovoltaic Characteristics of Silicon Nanoscrew and Nanohole Based Solar Cells.
A simple fabrication technology for both nanoscrews and nanoholes by Cesium Chloride (CsCI) self-assembly lithography and dry etching on silicon substrates is demonstrated. The porous Al template ranging from 400 nm to 2 μm average diameter is formed by lift-off the CsCl nanoislands in DI water as the ICP etching masks for nanoholes. Nanoscrews and nanoholes of desired height/depth from 1.2 to 4 μm are obtained by this method. The reflectance of nanoscrew and nanohole structures can achieve below 5% from wavelength of 400 to 1000 nm which is much lower than that of pyramid but the performance of pyramid solar cells is the best. Results show that the performance of nanoscrew and nanohole solar cells is strongly affected by some other factors such as surface passivation and electrode-contact property. Therefore, not only the antireflection advantage but also the surface passivation and improving the electrode-contact property should be considered together to improve nanostructure solar cells photovoltaic performance.
Jing
J
Liu
Xinshuai
X
Zhang
Gangqiang
G
Dong
Yuanxun
Y
Liao
Bo
B
Wang
Tianchong
T
Zhang
Futing
F
Yi