Silicon gettering: Some novel strategies for performance improvements of silicon solar cells

Silicon Porosification: State of the Art

“…Koker et al 240 have demonstrated that the luminescence associated with a hexafluorosilicate/PSi interface is blue shifted compared with the PL from the pure PSi layer. A similar trend was found by Saadoun et al 241 According to Aouida et al 239 a photoluminescence (PL) band around 1.93 eV is conditioned by the emission from dot-like Si particles with sizes not exceeding 5 nm. The shoulder at 2.09 eV was attributed to an excitonic emission from the energy levels of the SiOx surrounding the smallest Si nanocrystallites.…”

“…As ammonium hexafluorosilicate is water soluble and PSi is soluble in alkaline solutions, CVE can be used to form grooves in Si, which is of interest for the use of PSi in solar cell technology. 228,229,241,242 PL spectra of PSi layers prepared during etching in the flow of O 2 +NO 2 gases and HF vapors are shown in Figure 18.…”

Charge Transfer and Nanostructure Formation During Electroless Etching of Silicon

“…Porous Si (por-Si) and Si nanowires (SiNW) have appeared in numerous energy-related technologies. They are of growing interest to solar technology because of their potential to increase solar cell efficiency through (i) reduced reflectivity, [4][5][6] (ii) lower recombination losses, [7][8][9][10] and (iii) expanded spectral response. [11][12][13] A great deal of interest in por-Si has been in the areas of drug delivery 14,15 and sensors [16][17][18] as well as a variety of electronic and optoelectronic applications 19 and micromachining.…”

Luminescent Properties of Porous Silicon

“…As ammonium hexafluorosilicate is water-soluble and PSi is soluble in alkaline solutions, CVE can be used to form grooves in Si, which is of interest for the use of PSi in solar cell technology (Khedher et al 2004;Ben Rabha et al 2005;Ben Jaballah et al 2005;Hajji et al 2005).…”