Synthesis of Amorphous Er3+-Yb3+ Co-doped TiO2 and Its Application as a Scattering Layer for Dye-sensitized Solar Cells

다국어 초록 (Multilingual Abstract)

TiO2 doped with Er3+ and Yb3+ was used for fabricating a scattering layer and a nano-crystalline TiO2 electrode layer
to be used in dye-sensitized solar cells. The material was prepared using a new sol-gel combustion hybrid method
with acetylene black as fuel. The Er3+- Yb3+ co-doped titanium oxide powder synthesized at 700oC had embossed
structure morphology with a size between 27 to 54 nm that agglomerated to produce micron size particles, as observed
by the scanning electron micrographs. The XRD patterns showed that the Er3+- Yb3+ co-doped titanium oxide
had an amorphous structure, while using the same method without doping Er3+ or Yb3+, TiO2 was obtained in the
crystallite form with thea dominance of rutile phase. Fabricating a bilayer structure consisting of nano-crystalline
TiO2 and the synthesized Er3+- Yb3+ co-doped titanium oxide showed better scattering property, with an overall increase
of 15.6% in efficiency of the solar cell with respect to a single nano-crystalline TiO2 layer.

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