화학공학소재연구정보센터
Solar Energy Materials and Solar Cells, Vol.123, 249-254, 2014
CdTe solar cell performance under high-intensity light irradiance
Polycrystalline CdTe solar cell performance under high-intensity light irradiance was studied. The short-circuit current density and the open-circuit voltage were increased linearly and the fill factor and the efficiency of CdTe solar cells were decreased with increased light irradiance intensity. Analytical analysis was carried out to analyze the factors which induced the decreased fill factor. It was found that under 1-Sun light irradiation, the series resistance of both the CdTe and the front electrode (F-doped SnO2, FTO, sheet resistance of 14 Omega/sq) films contributed comparably to the series resistance. Under high-intensity irradiance of 25.9 Sun, the resistance of the CdTe layer was decreased to one hundredth value of that under 1-Sun irradiance, while the resistance of FTO remained unchanged. The experimental results clearly demonstrated that the electrical resistance of the FTO electrode was the limiting factor for the CdTe cell efficiency working under concentrated light irradiance. (C) 2014 Elsevier B.V. All rights reserved.