Impact of CdTe/CdS solar cell size
on photovoltaic working parameters
M. K. Al Turkestani*
Department of Physics, Umm
* Corresponding author. E-mail: firstname.lastname@example.org
Received: 18 February 2013; revised version accepted: 20 October 2013
Increasing the size of solar cells is a crucial step for industrial production of photovoltaics. However, the increase in the series resistance (Rs) is a major obstacle in achieving this, as an increased resistance has a deleterious effect on device performance. A 1 × 1 cm2 CdTe/CdS cell was divided into contact areas of differing sizes to investigate the effect of an increase in Rs. It is shown that Rs is proportional to the area of the cell when the device is tested under light illumination conditions. There is a significant effect on the fill factor (FF), and the results also indicate a possible change in the short-circuit current density (Jsc). The deterioration in both FF and Jsc is shown to influence the conversion efficiency. A comparison between the results obtained in this study and those of work also published in the same issue is presented. Moreover, the effect of the cell size on Rs under dark conditions is discussed.
Keywords: CdTe; Solar cells; TCO.