Transparent conductive oxide layer-less dye-sensitized solar cells consisting of floating electrode with gradient TiO_x blocking layer

摘要

A transparent conductive oxide less dye-sensitized solar cell (TCO-less DSC) consisting of a glass/a floating electrode (FE)/a stained nanoporous titania layer/a gel electrolyte sheet/a Pt layer/a Ti sheet is reported. The FE is composed of a stainless mesh sheet covered with a gradient TiO_x. layer, which suppressed back-electron transfers from the stainless to electrolytes. The efficiency increased from 2.87% to 4.68% by replacing a conventional dense TiO_2 blocking layer with the gradient TiO_x layer. The cell in this architecture gave the efficiency of 5.56% after optimization.