Journal
PHYSICA E
Volume 8, Issue 2, Pages 174-178Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1386-9477(99)00260-X
Keywords
CdSe; CdSe/CdS; nanoclusters
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CdSe nanoclusters overcoated with CdS shell were prepared with macapoacetic acid as stabilizer. The optical properties of CdSe nanoclusters and the influence of CdS shell on the electronic structures of CdSe cores were studied by optical absorption, photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopies. Based on PL and PLE results and the theoretical calculation on fine structure of bandedge exciton, a model of formation of excimer within the small clusters was proposed to explain the large Stokes shift of luminescence from absorption edge observed in PL results. (C) 2000 Elsevier Science B.V. All rights reserved.
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