Alloyed CdTe<sub>0.6</sub>S<sub>0.4</sub> Quantum Dots Sensitized TiO<sub>2</sub> Electrodes for Photovoltaic Applications — Oak Academic Publishing
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Alloyed CdTe<sub>0.6</sub>S<sub>0.4</sub> Quantum Dots Sensitized TiO<sub>2</sub> Electrodes for Photovoltaic Applications
Department of Physics, Faculty of Science, Taif University, Taif, KSA
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Department of Mathematical and Physical Engineering, Faculty of Engineering (Shoubra), Benha University, Cairo, Egypt
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Department of Physics, Faculty of Science, Taif University, Taif, KSA; Department of Physics, Faculty of Science, Aljouf University, Aljouf, KSA
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Department of Physics, Faculty of Science, Taif University, Taif, KSA; Department of Mathematical and Physical Engineering, Faculty of Engineering (Shoubra), Benha University, Cairo, Egypt
1 Department of Physics, Faculty of Science, Taif University, Taif, KSA
2 Department of Mathematical and Physical Engineering, Faculty of Engineering (Shoubra), Benha University, Cairo, Egypt
3 Department of Physics, Faculty of Science, Taif University, Taif, KSA; Department of Physics, Faculty of Science, Aljouf University, Aljouf, KSA
4 Department of Physics, Faculty of Science, Taif University, Taif, KSA; Department of Mathematical and Physical Engineering, Faculty of Engineering (Shoubra), Benha University, Cairo, Egypt
The photovoltaic performance of alloyed CdTe 0.6 S 0.4 quantum dot sensitized solar cells (QDSSCs) is investigated. Fluorine doped Tin Oxide (FTO) substrates were coated with 20 nm-diameter TiO 2 nanoparticles (NPs). Presynthesized colloidal solution of alloyed CdTe 0.6 S 0.4 quantum dots (QDs) of 4.2 nm w as deposited onto TiO 2 NPs substrates using direct adsorption (DA) technique, by dipping for different times at ambient conditions. The FTO counter electrodes were coated with platinum, while the electrolyte containing I - /I -3 redox species was sandwiched between the two electrodes. Compared to pure CdTe QDs and CdS QDs, CdTe 0.6 S 0.4 QDs showed better photovoltaic performance. The J-V characteristic curves of the assembled QDSSCs were measured at AM 1.5 simulated sunlight. The short current density (J sc ) and efficiency ( η ) increase with dipping time. At 24 h dipping time, the open-circuit photovoltage V oc , J sc , fill factor (FF), and η were 0.46 volts, 1.54 mA/cm 2 , 0.43 % and 0.31%, respectively.
KeywordsAlloyed CdTe<sub>0.6</sub>S<sub>0.4</sub>Quantum DotQuantum Dots Sensitized Solar CellPhotovoltaic Cell
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