Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

Investigating the Effect of Phosphorus Concentration on the Performance of Porous Silicon Solid State Solar Cells

Document Type : Original Reaearch Article

Authors
Shirin Mahmoudi 1
Mohamad Javad Eshraghi 2
Benyamin Yarmand 3
Nima Naderi 2
1 Semiconductor Department, Materials and Energy Research Center, Karaj.Iran
2 Semiconductor Department, Materials and Energy Research Center, Karaj, Iran
3 Nanotechnology and Advanced Materials Department, Materials and Energy Research Center, Karaj, Iran
10.30501/jamt.2019.88951
Abstract
In this study, the effect of phosphorous concentration has been investigated on performance of porous silicon solar cells. For this purpose, silicon substrates were etched into aqueous etching solution containing hydrofluoric acid / hydrogen peroxide with molar ratios 0.82, 0.87 and 0.89 via metal-assisted chemical etching. Surface characteristics were studied by optical microscopy, field-emission electron microscopy and antireflection analysis. In the following, solar cells were fabricated by phosphorous diffusion into optimized porous silicon substrate which phosphorous concentrations had values of 3%, 9%, and 15%. The result presented that in 0.82 molar ratio, the etched silicon had uniform porosities whose sizes were nearly to Ag nano-particles. The reflectance of this substrate was decreased to 11% and was the best substrate for absorbing incident light. Survey of fabricated solar cell performance showed 98% increasing of short circuit current in the solar cell which was made by P2O5 3%. This concentration due to is near the solubility of phosphorous in silicon, caused the increasing efficiency to 10.6%.
Keywords
Porous silicon
Phosphorous
Metal-Assisted Chemical Etching
Solid State Solar Cells
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  • Receive Date 10 June 2017
  • Revise Date 18 June 2018
  • Accept Date 09 January 2019