Which of the following components is not used in the fabrication of QD – sensitized solar cell?

Which of the following components is not used in the fabrication of QD – sensitized solar cell? Correct Answer Aspartic acid

A QD-sensitized solar cell has capped single-crystal ZnO nanowires with CdSe quantum dots immersed in mercaptopropionic acid that acts as hole transport medium. The electrons have a direct pathway to the photoanode owing to the nanowire morphology. This leads to 50-60% internal quantum efficiency of the solar cells.
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