Title :
Alternative molecular semiconductors for sensitizing nanocrystalline solar cells
Author :
Chevaleevski, Oleg ; Larina, Lioudmila ; Myong, Seung Yeop ; Tsvetkov, Aleksei ; Lim, Koeng Su
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., KAIST Univ., Daejeon, South Korea
Abstract :
The nanocrystalline TiO2 based solar cells sensitized with different metal-phthalocyanines (MePc) have been fabricated and investigated. The energy conversion efficiency of TiO2/MePc system several times exceeds the one obtained for a solid state cell based on the same type of materials. The optical absorption spectra of sensitized nanocrystalline layers were studied. It was shown that condensed dye molecule clusters agglomerated in the vicinity of the TiO2 surface do not contribute to the energy conversion process. We have also investigated the phthalocyanine-fullerene composites promising for the improvement of the conversion efficiency of MePc-sensitized solid-stated and nanocrystalline photovoltaic cells.
Keywords :
dyes; fullerene compounds; nanostructured materials; organic semiconductors; semiconductor device measurement; solar cells; titanium compounds; visible spectra; wide band gap semiconductors; MePc; TiO2; condensed dye molecule clusters; energy conversion efficiency; metal-phthalocyanines; molecular semiconductors; nanocrystalline solar cells; optical absorption spectra; photovoltaic cells; phthalocyanine-fullerene composites; sensitizing; Absorption; Composite materials; Energy conversion; Glass; Nanostructures; Optical materials; Optical sensors; Photoconductivity; Photovoltaic cells; Solid state circuits;
Conference_Titel :
Photovoltaic Specialists Conference, 2002. Conference Record of the Twenty-Ninth IEEE
Print_ISBN :
0-7803-7471-1
DOI :
10.1109/PVSC.2002.1190852
