38 research outputs found
Formula of success : the Singapore Airlines story.
The world airline industry is a highly competitive, albeit lucrative, arena. In this environment, Singapore SIA has emerged as one of the role models of airline success story in recent aviation history. The research looks at the business environment in which the airline operates -in terms of the available opportunities and threats. SIA's impressive profitability record and the success factors that relate to her sustained profitability.Master of Business Administratio
Cofactor F420-Dependent Enzymes: An Under-Explored Resource for Asymmetric Redox Biocatalysis
Development of Nonstoichiometric CuInS<sub>2</sub> as a Light-Harvesting Photoanode and Catalytic Photocathode in a Sensitized Solar Cell
A simple one-pot approach was developed
to obtain nonstoichiometric
CuInS<sub>2</sub> nanocrystals. Using this approach, both In-rich
and Cu-rich CuInS<sub>2</sub> nanocrystals could be reliably synthesized
by tuning stoichiometric combinations of [Cu]/[In] precursor constituents.
By designing Cu-rich CuInS<sub>2</sub> heteronanostructures to serve
as counter electrodes, quantum-dot-sensitized solar cells (QDSSCs)
equipped with In-rich CuInS<sub>2</sub> and CdS cosensitizers delivered
a power conversion efficiency of 2.37%, which is significantly more
efficient than conventional Pt counter electrodes. To the best of
our knowledge, this study represents the first report utilizing nonstoichiometric
CuInS<sub>2</sub> nanocrystals as a photon-harvesting sensitizer comprised
of a photoanode and photocathode in QDSSCs; also unique to this report,
these nonstoichiometric CuInS<sub>2</sub> nanocrystals were formed
by simply changing the cationic molar ratios without complicated precursor
preparation. Impedance spectroscopy and Tafel polarization indicated
that these Cu-rich CuInS<sub>2</sub> heteronanostructures had electrocatalytic
activities (used for reducing S<sup>2–</sup>/S<sub><i>n</i></sub><sup>2–</sup>) that were superior to a Pt catalyst. Moreover, we demonstrated
that Cu-rich CuInS<sub>2</sub> heteronanostructures were also useful
counter electrodes in dye-sensitized solar cells, and this finding
revealed a promising conversion efficiency of 6.11%, which was ∼96%
of the efficiency in a cell with a Pt-based counter electrode (6.32%)