Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6612858 | Electrochimica Acta | 2014 | 5 Pages |
Abstract
In recent times, Mn doped quantum dot sensitized solar cells (QDSSCs) have shown a lot of interest as it provides a different strategy to improve the photovoltaic performances. In this work, we have systematically studied the effect of Mn2+ dopant concentration on the photovoltaic performances of CdS based QDSSCs. The open circuit potential increases systematically with increase in Mn2+ dopant concentration. The efficiency of the solar cell increases from 1.63% to 2.53% from undoped to 7.5% doped CdS. The role of Mn2+ in enhancing the photovoltaic performances was further probed by open circuit voltage decay and the energy levels were studied using transient absorption spectroscopy. Both spin and orbital forbidden Mn d-d transition (4T1 - 6A1) helps in reducing the recombination inside the solar cell, which improves the overall photovoltaic performances.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Pralay K. Santra, Yong-Siou Chen,