Quantum confinement of PbS microcrystals in glass

Abstract A microcrystalline PbS phase has been thermally produced from an oxide glass host. X-ray linewidth measurements have shown that the average particle size can be controlled in the range 8–30 nm, depending on the thermal development schedule. Quantum confinement behavior has been observed based on the measurement of sub-band structure of the absorption edge. Spectral shifts of the sub-bands were found to be consistent with the inverse square of the particle size, consistent with a quantum confinement origin. A lower-concentration PbSe phase has also been obtained from the same base-glass composition showing similar optical effects.

[1]  T. Elsaesser,et al.  Picosecond optical nonlinearities in lead chalcogenide semiconductors , 1991 .

[2]  L. Brus,et al.  Picosecond resonance Raman scattering study of methylviologen reduction on the surface of photoexcited colloidal cadmium sulfide crystallites , 1986 .

[3]  D. W. Hall,et al.  Quantum confinement effects of semiconducting microcrystallites in glass , 1987 .

[4]  Masayuki Nogami,et al.  CdS microcrystal-doped silica glass prepared by the sol-gel process , 1990 .

[5]  Louis E. Brus,et al.  Electron-electron and electron-hole interactions in small semiconductor crystallites : The size dependence of the lowest excited electronic state , 1984 .

[6]  Tijana Rajh,et al.  Size quantization in small semiconductor particles , 1985 .

[7]  David A. B. Miller,et al.  Theory of the linear and nonlinear optical properties of semiconductor microcrystallites. , 1987, Physical review. B, Condensed matter.

[8]  B. Cullity,et al.  Elements of X-ray diffraction , 1957 .

[9]  Ying Wang,et al.  PbS in polymers. From molecules to bulk solids , 1987 .

[10]  A. I. Ekimov,et al.  Quantum size effect in semiconductor microcrystals , 1985 .

[11]  Masayuki Nogami,et al.  Preparation of Small‐Particle‐Size, Semiconductor CdS‐Doped Silica Glasses by the Sol–Gel Process , 1990 .

[12]  Masayuki Nogami,et al.  Microcrystalline PbS doped silica glasses prepared by the sol-gel process , 1990 .

[13]  Louis E. Brus,et al.  Electronic wave functions in semiconductor clusters: experiment and theory , 1986 .