2024-03-29T14:04:40Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/960732024-01-09T10:08:06Zcom_10234_2507com_10234_9col_10234_6973
00925njm 22002777a 4500
dc
Fabregat-Santiago, Francisco
author
Bisquert, Juan
author
Cevey, Le
author
Chen, Peter
author
Wang, Mingkui
author
Zakeeruddin, Shaik Mohammed
author
Grätzel, Michael
author
2009
We show that electron transport mechanisms in TiO2 solid-state dye-sensitized solar cells (SDSCs) with spiro-OMeTAD as hole conductor are similar to those of high-performance DSCs with liquid electrolytes and ionic liquids. Impedance spectroscopy provides the parameters for transport and recombination at different conditions of steady state in the dark. The recombination rate is much higher in the solid solar cell, this being a main limiting step to obtain high-efficiency SDSCs. Thus, the expected gain in photovoltage, due to a lower hole Fermi level, is prevented by recombination losses. Under low potentials the transport is limited by the electron transport in the TiO2, but at high potentials spiro-OMeTAD transport resistance reduces the fill factor and hence the efficiency on high-current devices.
0002-7863
http://hdl.handle.net/10234/96073
http://dx.doi.org/10.1021/ja805850q
electron transport
solid state
solar cells
Electron Transport and Recombination in Solid-State Dye Solar Cell with Spiro-OMeTAD as Hole Conductor