Recent Development of Dye-sensitized Solid-state Solar Cell

Abstract

The DSSSCs sensitized with indoline dyes afforded fairly good performances. The organic dyes having indoline or coumarine moiety sensitized DSSSC produce overall energy conversion efficiency of 3.6% or 2.0% respectively. The indoline dye (D-149) sensitized DSSSC efficiency is higher than that of the cells of similar configuration sensitized with N3 dye. Another improvement was achieved by using the screen-printed TiO₂ electrode which have larger pore-size than conventional TiO₂ electrode (18NR-TiO₂). Filling the TiO₂ pore with CuI could be improved in the case of TiO₂ film with larger pore size which could becontrolled by the addition of PEG to TiO₂ paste. 18NR-TiO₂/D-149 dye/CuI solar cell efficiency (1.14 %) was appreciably lower than the case of P25 based TiO₂ film (2.95 % for 2 wt% PEG, 3.75 % for 5wt% PEG). These results suggested the porosity of TiO₂ film is crucial factor.