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IPM
30
YEARS OLD

“School of Physics”

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Paper   IPM / P / 15076
School of Physics
  Title:   Supercritical synthesis and characterization of graphene–PbS quantum dots composite with enhanced photovoltaic properties
  Author(s): 
1 . A. Tayyebi
2 . M.M. Tavakoli
3 . M. Outokesh
4 . A. Shafiekhani
5 . A. Simchi
  Status:   Published
  Journal: Ind. Eng. Chem. Res
  Vol.:  54
  Year:  2015
  Pages:   7382-7392
  Supported by:  IPM
  Abstract:
Lead sulfide quantum dots (PbS QDs) were decorated onto a graphene surface in a semi-core–shell structure using supercritical ethanol. The temperature of ethanol played significant role in controlling size and agglomeration of QDs as well as the extent of reduction of graphene. Average size of the QDs was estimated by transmission electron microscopy to be around 3.96 nm and by quantum models to be about 4.34 nm. PbS QDs prepared at 330 °C were of high purity, and the yield was 99

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