期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 509, 期 19, 页码 5843-5847出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2011.02.141
关键词
Nanostructured materials; Semiconductors; Chemical synthesis; Optical properties; Phonons
资金
- SRM University
Tin sulfide nanoparticles were synthesized through wet chemical route. Structure and phase purity were confirmed by powder XRD. Morphology and size were identified from TEM and AFM. The room temperature photoluminescence spectrum shows the band edge emission at 1.57 eV. The direct and indirect band gaps are estimated from UV-vis-NIR absorption spectrum as 1.78 and 1.2 eV, respectively. Blue shift of 0.48 eV observed for direct transition and 0.2 eV for indirect transition as compared to bulk band gap is due to quantum confinement effect. The Raman spectrum of SnS nanoparticles shows all the predicted Raman modes which show shift towards lower wave number side in comparison with those of the SnS single crystal. This is attributed to phonon confinement. (C) 2011 Elsevier B.V. All rights reserved.
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