Enhanced photovoltaic performance with co-sensitization of a ruthenium(ii) sensitizer and an organic dye in dye-sensitized solar cells

Umer Mehmood, Ibnelwaleed A. Hussein, Khalil Harrabi, Nouar Tabet, Golibjon Berdiyorov

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13 Citations (Scopus)

Abstract

Co-sensitization is demonstrated to be an effective technique to enhance the efficiency of dye-sensitized solar cells, where an efficiency of 9.23% is achieved by mixing N3 and RK-1 dyes. The assembled solar cells are characterized by UV-vis absorption measurements, current-voltage characteristics, and electrochemical impedance spectroscopy. The co-sensitized solar cell shows an enhanced photovoltaic performance as compared to the devices sensitized by individual dyes. Upon optimization, the device made of 0.3 mM N3 + 0.2 mM RK-1 yielded Jsc = 18.1 mA cm2, Voc = 888 mV, FF = 57.44, and η = 9.23%. This performance is superior to that of solar cells sensitized with either N3 (6.10%) or RK-1 (5.82%) fabricated under the same conditions. The enhanced efficiency can be attributed to the decrease of the competitive light absorption by I-/I3 -, dye aggregation, and charge recombination.

Original languageEnglish
Pages (from-to)7897-7901
Number of pages5
JournalRSC Advances
Volume6
Issue number10
DOIs
Publication statusPublished - 2016

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ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

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