Details

Autor(en) / Beteiligte

• Zhou, Weichang
• Liu, Ruibin
• Wan, Qiang
• Zhang, Qinglin
• Pan, A. L
• Guo, Lin
• Zou, Bingsuo

Titel

Bound Exciton and Optical Properties of SnO2 One-Dimensional Nanostructures

Ist Teil von

• Journal of physical chemistry. C, 2009-02, Vol.113 (5), p.1719-1726

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2009

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• One-dimensional nanostructures of direct-forbidden semiconductor SnO2 crystallite have been prepared in large scale via thermal evaporation of tin monoxide at 1100 °C. The anomalous optical emission even lasing phenomena are observed below the band edge under pulsed laser excitation, which usually does not occur for a direct-forbidden band semiconductor. Scanning electron microscopy, X-ray powder diffraction, transmission electron microscopy, UV−vis reflectance spectroscopy, and Raman scattering spectra were used to characterize the as-synthesized products. The processes of multiphonon coupling with exciton dominate in the exciton transition and lasing. The enhancement of exciton−phonon coupling and bound exciton transition could be mapped in the phonon scattering process. The origin of photoluminescence and lasing of SnO2 nanobelts and nanowires was illustrated.