DESIGN OF HIGH-EFFICIENCY TANDEM DYE-SENSITIZED SOLAR CELLWITH TWO-PHOTOANODES TOWARD THE BROADER LIGHTHARVESTING

摘要

Tandem sensitized solar cell (TDSSCs) with various dyes is a promising device withbroader harvesting efficiency of the solar spectrum. In this work, two dye sensitized solarcells (DSSCs) of organic dyes and different absorption regions are stacked together inparallel connection to construct tandem dye-sensitized solar cells with broader and moreintegrated absorption band. Gold nanorods (GNRs) were utilized as a scattering layer inthe back face of the back cell. The results showed that TDSSC exhibited much higherconversion efficiency compared to single DSSCs. Efficiencies up to 11 % can be achievedusing TDSSC in parallel connection. Moreover, charge transfer resistance Rct decreasedfrom 95 Ω to 54 Ω retaining about 76 percent improvement.