Effect of the Preparation Procedure on the Morphology of Thin TiO2 Films and Their Device Performance in Small-Molecule Bilayer Hybrid Solar Cells
作者： Eva L. Unger , Francesca Spadavecchia , Kazuteru Nonomura , Pål Palmgren , Giuseppe Cappelletti
DOI: 10.1021/AM301604X
关键词: Anatase 、 Materials science 、 Surface roughness 、 Nanoporous 、 Spin casting 、 Titanium dioxide 、 Bilayer 、 Chemical engineering 、 Nanotechnology 、 Layer (electronics) 、 Hybrid solar cell
摘要: Flat titanium dioxide films, to be used as the acceptor layer in bilayer hybrid solar cell devices, were prepared by spray-pyrolysis and spin-casting. Both preparation methods resulted anatase titania films with similar optical electronic properties but considerably different film morphologies. Spray pyrolysis dense TiO2 grown onto affected surface roughness of underlying conducting glass substrates. The spin-casting procedure nanoporous films. Hybrid devices varying thickness small-molecule semiconducting dye TDCV-TPA investigated. Devices built spray-pyrolyzed substrates yielded conversion efficiencies up 0.47%. Spin-cast exhibited short circuits for thin thickness. For thicker layers performance these was 0.6% due higher interfacial area charge separation
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