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Design of high-efficiency tandem dye-sensitized solar cell with two-photoanodes toward the broader light harvesting
(Inst Materials Physics, 2018) Ali A.K.; Ela S.E.; Hassoon K.I.; Ela C.; Ahmed D.S.
Tandem sensitized solar cell (TDSSCs) with various dyes is a promising device with broader harvesting efficiency of the solar spectrum. In this work, two dye sensitized solar cells (DSSCs) of organic dyes and different absorption regions are stacked together in parallel connection to construct tandem dye-sensitized solar cells with broader and more integrated absorption band. Gold nanorods (GNRs) were utilized as a scattering layer in the back face of the back cell. The results showed that TDSSC exhibited much higher conversion efficiency compared to single DSSCs. Efficiencies up to 11 % can be achieved using TDSSC in parallel connection. Moreover, charge transfer resistance Rct decreased from 95 ? to 54 ? retaining about 76 percent improvement. © 2018, Inst Materials Physics. All rights reserved.