Figure 1
From: Transient Photoinduced Absorption in Ultrathin As-grown Nanocrystalline Silicon Films
(Left) Bright field images from cross-section specimens from the films with nominal thicknesses: (a) 5 nm, (b) 15 nm, and (c) 30 nm, respectively, revealing the evolution of the columnar structure as the thickness increases. The scale in the (c) holds for all the images. The real thicknesses are larger than the nominal ones by about 15%. (Right) A high resolution TEM image from the 30-nm film is shown. It is obvious the bigger size of nanocrystals in this case