Bifacial dye-sensitized solar cells from transparent RuSe counter electrodes

摘要

Bifacial solar cells that can generate electricity from either front or rear side are regarded as advanced photo-voltaics for markedly increased photoelectric conversion efficiency. We present here the fabrication of transparent RuSe counter electrodes by an alternating electrodeposition method for bifacial dye-sensitized solar cells (DSSCs). The catalytic and photovoltaics performances are maximized by tuning stoichiometric Ru/Se ratio and bilayer number. Upon irradiation by AM1.5 (100 mW cm(-2)), the device yields a maximized front efficiency of 8.72% and a rear efficiency of 5.9%, arising from the 80%-transparency of RuSe electrode in visible light region. This strategy provides new opportunities for fabricating high-performance DSSCs.