Highly efficient and transparent counter electrode for application in bifacial solar cells

Triton X-100, DMSO and TiO2 were blended with PEDOT:PSS to produce a PEDOT:PSS/DMSO/TX100/TiO2 CE. A bifacial DSSC based on the PEDOT:PSS/DMSO/TX100/TiO2 CE was fabricated, and its photovoltaic characteristics were obtained under simulated solar light of 100 mWcm(-2). Under bifacial illumination, the DSSC with the Pt CE achieved a current density (Jsc) of 16.16 mAcm(-2) and system efficiency (E-sys) of 8.67% while the DSSC with the PEDOT:PSS/DMSO/TX100/TiO2 CE achieved a J(sc) of 17.72 mAcm(-2) and a E-sys of 9.14%. PEDOT:PSS/DMSO/TX100/TiO2 CE is very stable, has a high transmittance, exhibits high electro-catalytic activity, and is an excellent substitute for the Pt CE.

Automated summary

The bifacial DSSC fabricated with PEDOT:PSS/DMSO/TX100/TiO2 counter electrode showed higher photovoltaic performance, with higher current density and system efficiency compared to Pt electrode. PEDOT:PSS/DMSO/TX100/TiO2 counter electrode exhibits advantages of high stability, transparency, and electro-catalytic activity.