Abstract :
Solid-state dye-sensitized solar cells (DSSCs) were fabricated in which the thin p-CuI film acts as a hole collector. Influences of the
different preparation methods, composition, aging time of the TiO2 pastes and sensitizing time on the performance of the cells were investigated.
Different preparation routes for the TiO2 paste do not obviously affect the performance of the cells. The volume of water, acetic
acid and 2-propanol contained in the TiO2 pastes and the amount of the TiO2 powder were determined. The efficiency of the cells remains
nearly stable when the aging period of the TiO2 pastes is within one week. The favorable dying time is above 2 h. The cells having a
favorable performance deliver a mean short-circuit photocurrent of 10.8 mA cm 2 and mean open-circuit voltage of 0.61 V at
100 mW cm 2 (1.5 AM). The mean fill factor and the mean efficiency of these cells are 0.55% and 3.7%, respectively. The short-circuit
photocurrent rapidly decays after 3 h, and at the same time, the open-circuit voltage slowly decreases when the time increases, and then
remains nearly stable after 24 h.
2006 Elsevier Ltd. All rights reserved
