Wavelength (nm)

FIGURE 4.1 Typical absorbance, photoluminescence excitation (PLE), and photoluminescence (PL) emission spectra for silicon nanoparticles with orange-red emission, dispersed in chloroform. PLE was measured at an emission wavelength of640 nm. PLwas measured at an excitation wavelength of330 nm. The inset compares the absorbance data to that for a crystalline silicon thin film. (From Dash, W.C. and Newman, R., Phys. Rev., 99, 1151, 1955.)

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