Fibrous nanostructures are proposed for the application of solar cell. Irradiation of silicon surface with a few hundred femtosecond laser pulses of fluence 13 kJ/m2 at 13 MHz pulse frequency in air atmosphere results in the formation of fibrous nanostructure layer on the treated surface that leads to a significant decrease in the reflection of visible radiation. For the visible wavelength, the decreased reflection is a result of the nature of the nanostructure. The Raman peak shift in the irradiated surface confirms that the surface is changed to amorphous silicon due to fibrous nanostructure formation.
A. Salam Mahmood, Sivakumar, M., Venkatakrishnan, K., and Tan, B., “Enhancement in Optical Absorption of Silicon Fibrous Nanostructure Produced Using Femtosecond Laser Ablation”, Applied Physics Letters, vol. 95, pp. 034107-034107-3, 2009.