Figure 3From: Efficient visible luminescence of nanocrystalline silicon prepared from amorphous silicon films by thermal annealing and stain etching Photoluminescence spectra of a-Si:H film and samples #1 (triangles), #2 (squares), and #3 (solid line) after SE. The spectrum of porous Si prepared by electrochemical etching (anodization) is also shown for comparison.Back to article page