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Pan M.,Xiamen University | Li Y.,Xiamen University | Chen C.,Xiamen University | Chen C.,Fujian Province Semiconductor Illumination Center
Bandaoti Guangdian/Semiconductor Optoelectronics | Year: 2011

After phosphorus gettering pretreatment, the low-cost polycrystalline silicon (poly-Si) wafers are textured by chemical etching solution. The poly-Si surface and its light trapping were analyzed by scanning electron microscope (SEM) and reflection spectrum, respectively. Results show that the surface etched by the acid solution was distributed with uniform earthworm-like etched-pits, and it had a very low reflectance. The reflectivity of the sample can reach 22.75% within the wavelength of 400~1100 nm. After the deposition of SiN x thin films, the reflectivity can be minimized to 8.33%, which is 20.96% lower than the bare Si wafer. Source


Pan M.,Xiamen University | Zhang Y.,Xiamen University | Chen C.,Xiamen University | Chen C.,Fujian Province Semiconductor Illumination Center
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2013

A one-dimensional model for solar cells fabricated on low-cost solar grade polysilicon (SoG poly-Si) material was presented which was produed by physical metallurgical process. The effect of grain size and grain boundary recombination velocity on the photoelectric conversion efficiency were calculated under almost practical case. The simulation results coincided with the experimental data. It is found that in order to attain the best performance of low-cost SoG-Si solar cells, grain sizes greater than 5mm will be needed. It is also found that a small grain size is permitted if the effective grain boundary recombination velocity is low enough. Source


Zhang Y.-B.,Xiamen University | Pan M.,Xiamen University | Cheng X.,Xiamen University | Chen C.,Xiamen University | Chen C.,Fujian Province Semiconductor Illumination Center
Faguang Xuebao/Chinese Journal of Luminescence | Year: 2012

A software for the numerical simulation of crystalline silicon solar cells is developed. Photocarrier continuity equation, effective mobility, effective minority carrier diffusion length and carrier recombination on crystal boundary of multicrystalline silicon are taken into account in the physical model. The software outputs the numerical simulation of crystalline silicon solar cells by numerical results and graphics. As the simulation results close to experimental data, the software can be a good guide for the design and production of crystalline silicon solar cells. Source

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