Antimony-Doped Tin Oxide Aerogels as Porous Electron Collectors for Dye-Sensitized Solar Cells

作者：Baena Juan Pablo Correa; Agrios Alexander G^*

来源：Journal of Physical Chemistry C, 2014, 118(30): 17028-17035.

DOI：10.1021/jp500542v

Antimony-doped tin oxide (ATO) aerogels have been prepared as conductive scaffolds for TiO2 in dyesensitized solar cells (DSCs). The high surface area, porosity and particle interconnectivity inherent to aerogels, and the conductivity and transparency of ATO make these structures attractive as porous electron collectors. Aerogels were prepared by sol-gel processing and supercritical drying of ATO containing varying amounts of Sb. These were coated with varying TiO2 layer thicknesses by atomic layer deposition, sensitized with an organic dye (D149), and made into DSC devices using iodide/triiodide (I-/I-3(-)) and ferrocene/ferrocenium (Fc/Fc(+)) electrolytes. Scanning electron microscopy was used to study the morphological characteristics of the aerogel materials. The effect of ALD cycles on the dye adsorption was measured. Current-voltage characteristics were used to study device performance. We found that ATO aerogels with 15% Sb have improved performance over TiO2 and undoped tin oxide aerogel devices. DSC electron kinetics were studied by transient decay measurements to better understand the role of electron transport and lifetime in the performance of the devices.

• 出版日期2014-7-31