Photovoltaic measurements in carbon nanotube - amorphous silicon core/shell nanowire

Carbon nanotube is one of the promising materials for exploring new concepts in solar energy conversion and photon detection. Here, we report the first experimental realization of a single core/shell nanowire photovoltaic device (2-4μm) based on carbon nanotube and amorphous silicon. Specifically, a multi-walled carbon nanotube (MWNTs) was utilized as the metallic core, on which n-type and intrinsic amorphous silicon layers were coated. A Schottky junction was formed by sputtering a transparent conducting indium-tin-oxide layer to wrap the outer shell of the device. The single coaxial nanowire device showed typical diode ratifying properties with turn-on voltage around 1V and a rectification ratio of ~104 when biased at ±2V. Under illumination, it gave an open circuit voltage of ~0.26V. Our study has shown a simple and useful platform for gaining insight into nanowire charge transport and collection properties. Fundamental studies of such nanowire device are important for improving the efficiency of future nanowire solar cells or photo detectors.

[1]  Y. Lan,et al.  Physics and applications of aligned carbon nanotubes , 2011 .

[2]  M. Naughton,et al.  Nanocoax solar cells based on aligned multiwalled carbon nanotube arrays , 2011 .

[3]  Kui‐Qing Peng,et al.  Silicon Nanowires for Photovoltaic Solar Energy Conversion , 2011, Advanced materials.

[4]  Zongfu Yu,et al.  Nanodome solar cells with efficient light management and self-cleaning. , 2010, Nano letters.

[5]  Yang Yang,et al.  Arrays of Parallel Connected Coaxial Multiwall‐Carbon‐ Nanotube–Amorphous‐Silicon Solar Cells , 2009 .

[6]  P. Thony,et al.  Full process for integrating silicon nanowire arrays into solar cells , 2009 .

[7]  Supratik Guha,et al.  Characteristics of vapor–liquid–solid grown silicon nanowire solar cells , 2009 .

[8]  M. Brongersma,et al.  Energy transfer in nanowire solar cells with photon-harvesting shells , 2009 .

[9]  Willem L. Vos,et al.  Broad‐band and Omnidirectional Antireflection Coatings Based on Semiconductor Nanorods , 2009 .

[10]  Zongfu Yu,et al.  Optical absorption enhancement in amorphous silicon nanowire and nanocone arrays. , 2009, Nano letters.

[11]  Kai Wang,et al.  Direct Growth of Highly Mismatched Type II ZnO/ZnSe Core/Shell Nanowire Arrays on Transparent Conducting Oxide Substrates for Solar Cell Applications , 2008 .

[12]  Otto L Muskens,et al.  Design of light scattering in nanowire materials for photovoltaic applications. , 2008, Nano letters.

[13]  Hui Fang,et al.  Fabrication of slantingly-aligned silicon nanowire arrays for solar cell applications , 2008, Nanotechnology.

[14]  Kui‐Qing Peng,et al.  Silicon nanowire array photoelectrochemical solar cells , 2008 .

[15]  Nathan S Lewis,et al.  Photovoltaic measurements in single-nanowire silicon solar cells. , 2008, Nano letters.

[16]  J. Rand,et al.  Silicon Nanowire Solar Cells , 2007 .

[17]  Charles M. Lieber,et al.  Coaxial silicon nanowires as solar cells and nanoelectronic power sources , 2007, Nature.

[18]  Lin-wang Wang,et al.  "Quantum coaxial cables" for solar energy harvesting. , 2007, Nano letters.

[19]  N. Lewis.  Toward Cost-Effective Solar Energy Use , 2007, Science.

[20]  Nathan S. Lewis,et al.  Comparison of the device physics principles of planar and radial p-n junction nanorod solar cells , 2005 .