Fabrication and optical properties of conjugated polymer composited multi-arrays of TiO2 nanowires via sequential electrospinning.
We report here a simple method of fabricating multi-layered architectures of cross-aligned inorganic nanowires via sequential electrospinning method equipped with a newly devised collector that is able to prepare aligned inorganic nanowires. The multi-layers of aligned TiO2 nanowires can be deposited in a proportional increment of weight with collecting time and reveal a large reduction of electrical resistance by at least 30% compared to a randomly collected TiO2 nanowire structure. The solar cell performance of the cross-aligned TiO2 nanowire layers composited with a conjugated polymer of poly[2-methoxy, 5-(2'-ethyl-hexyloxy)-1,4-phenylenevinylene] (MEH-PPV) is significantly enhanced by 70% or greater in the organic-inorganic hybrid photovoltaic devices than that fabricated with the randomly-collected TiO2 nanowire photoanode.
Shim
Hee-Sang
HS
Department of Materials Science and Engineering and Program for Integrated Molecular Systems (PIMS), Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-gwagiro, Buk-gu, Gwangju 500-712, Republic of Korea.
Kim
Jeong Won
JW
Kim
Won Bae
WB