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dc.contributor.authorChen, Ruien
dc.contributor.authorSun, Handongen
dc.contributor.authorDong, Zhilien
dc.contributor.authorLing, Boen
dc.contributor.authorSun, Xiaoweien
dc.contributor.authorZhao, Jun Liangen
dc.contributor.authorKe, Changen
dc.contributor.authorTan, Swee Tiamen
dc.identifier.citationLing, B., Sun, X., Zhao, J. L., Ke, C., Tan, S. T., Chen, R., & et al. (2010). A SnO2 Nanoparticle/Nanobelt and Si Heterojunction Light-Emitting Diode. Journal of Physical Chemistry C, 114 (43), 18390–18395.en
dc.description.abstractSingle-crystalline zero-dimensional tin dioxide (SnO2) nanoparticles and one-dimensional SnO2 nanobelts were synthesized on silicon (Si) substrates with different seed layer coatings by simple vapor-phase transport method. The crystal structure and morphology of the as-synthesized products were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Raman scattering spectroscopy. Both geometrically different nanostructures were further employed to fabricate the light-emitting diodes and showed dominant red and green emission bands at room temperature, which were ascribed to the deep defect states in SnO2. However, SnO2-nanobelts-based light-emitting diodes showed another violet emission peaking at ca. 400 nm which was attributed to the shallow defect state related to the surface states/defects. The different emission performance between nanoparticle and nanobelts devices was attributed to the larger surface-to-volume ratio of the nanobelts, which was confirmed by the Raman and photoluminescence analysis. A thin SiO2 intermediate layer was found to be crucial in achieving light emission from a n-SnO2/p-Si heterojunction with large valence band offset (ca. 2.96 eV), by which sufficient potential-energy difference can be maintained between SnO2 and Si, thus facilitating the tunneling injection of holes.en
dc.relation.ispartofseriesJournal of physical chemistry Cen
dc.rights© 2010 American Chemical Societyen
dc.subjectDRNTU::Engineering::Materials::Nanostructured materialsen
dc.titleA SnO2 nanoparticle/nanobelt and Si heterojunction light-emitting diodeen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science & Engineeringen
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