Nano-silver arrays assisted chemical etching and catalysed texturing of silicon wafers for solar cells
by Zongcun Liang; Haifeng Zhang; Senrong Chen
International Journal of Nanomanufacturing (IJNM), Vol. 9, No. 3/4, 2013

Abstract: Metal assisted chemical etching (MACE) is a neoteric method for texturing treatment of silicon surface. In this paper, a low-cost method used for preparing nano-silver particles for catalysing to form texturing of silicon wafers is introduced. Polyethylene glycol is utilised as reductant in the AgNO₃ solution to prepare nano-silver particles and then the nano-silver particles are transferred to the p-type (1 0 0) silicon surface. After immersing the samples in the etchant consisted of HF and H₂O₂, the reflectivity of the silicon wafers could reduce to 5.79% throughout the spectrum of the wavelength from 400 to 1,000 nm. The optimal ratio of each constituent of the etchant is HF (49%): H₂O₂ (30%): H₂O = 1:2:10 in volume, and the optimal etching time is 3 min.

Online publication date: Mon, 31-Mar-2014

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