study the effect of silicon nanowire length on characteristics of silicon nanowire based solar cells by using impedance spectroscopy
Authors
abstract
silicon nanowire (sinw) arrays were produced by electroless method on polycrystalline si substrate, in hf/ agno3 solution. although the monocrystalline silicon wafer is commonly utilized as a perfect substrate, polycrystalline silicon as a low cost substrate was used in this work for photovoltaic applications. in order to study the influence of etching time (which affects the sinws length) on different elements in ac equivalent circuit of the fabricated solar cells, impedance spectroscopy was accomplished for the first time in forward bias direction and under illumination. measurements indicated a growth of recombination with increase in etching time that may be attributed to enhancement in the number of defects on nanowires surfaces as a result of increase in the length of sinws. this trend reduces recombination resistance in device equivalent ac circuit and reduces the efficiency of solar cells. impedance spectra and fitting curves also showed that the effective carrier lifetime decreases with increase in etching time.
similar resources
Study the Effect of Silicon Nanowire Length on Characteristics of Silicon Nanowire Based Solar Cells by Using Impedance Spectroscopy
Silicon nanowire (SiNW) arrays were produced by electroless method on polycrystalline Si substrate, in HF/ AgNO3 solution. Although the monocrystalline silicon wafer is commonly utilized as a perfect substrate, polycrystalline silicon as a low cost substrate was used in this work for photovoltaic applications. In order to study the influence of etching time (which affects the SiNWs length) on d...
full textEffect of Silicon Nanowire on Crystalline Silicon Solar Cell Characteristics
Nanowires (NWs) are recently used in several sensor or actuator devices to improve their ordered characteristics. Silicon nanowire (Si NW) is one of the most attractive one-dimensional nanostructures semiconductors because of its unique electrical and optical properties. In this paper, silicon nanowire (Si NW), is synthesized and characterized for application in photovoltaic device. Si NWs are ...
full textSilicon nanowire solar cells
Silicon nanowire-based solar cells on metal foil are described. The key benefits of such devices are discussed, followed by optical reflectance, current-voltage, and external quantum efficiency data for a cell design employing a thin amorphous silicon layer deposited on the nanowire array to form the p-n junction. A promising current density of 1.6 mA /cm2 for 1.8 cm2 cells was obtained, and a ...
full textCore-shell silicon nanowire solar cells
Silicon nanowires can enhance broadband optical absorption and reduce radial carrier collection distances in solar cell devices. Arrays of disordered nanowires grown by vapor-liquid-solid method are attractive because they can be grown on low-cost substrates such as glass, and are large area compatible. Here, we experimentally demonstrate that an array of disordered silicon nanowires surrounded...
full textLight trapping in silicon nanowire solar cells.
Thin-film structures can reduce the cost of solar power by using inexpensive substrates and a lower quantity and quality of semiconductor material. However, the resulting short optical path length and minority carrier diffusion length necessitates either a high absorption coefficient or excellent light trapping. Semiconducting nanowire arrays have already been shown to have low reflective losse...
full textAmorphous Silicon Core-shell Nanowire Solar Cells
Nanostructures such as nanoparticles and nanowires have been demonstrated as powerful tools to improve light absorption[1-4], to enable low temperature process[5], to demonstrate multi-exciton generation[6], and to decouple the absorption depth and carrier diffusion length[7, 8]. Here we demonstrated the first amorphous silicon coreshell nanowire solar cells, which can be fabricated through a l...
full textMy Resources
Save resource for easier access later
Journal title:
international journal of nanoscience and nanotechnologyPublisher: iranian nano society
ISSN 1735-7004
volume 9
issue 2 2013
Hosted on Doprax cloud platform doprax.com
copyright © 2015-2023