Sb 2 Se 3 has attracted great research interest very recently as a promising absorber material for thin film photovoltaics due to its suitable bandgap, high absorption coefficient, and non‐toxic, low cost, and earth abundant nature. In this work, a significant efficiency improvement to 4.8% of superstrate cadmium sulfide (CdS)/Sb 2 Se 3 solar cells is obtained by the controlled addition of oxygen during thermal evaporation of Sb 2 Se 3 films. Systematic materials and device physics characterization reveal that oxygen addition during Sb 2 Se 3 film evaporation significantly improves the CdS/Sb 2 Se 3 heterojunction quality through effective passivation of interfacial defect states, resulting in a substantial enhancement in device circuit voltage and short circuit current density. The 4.8% device is the highest efficiency thus far reported for Sb 2 Se 3 thin film solar cells. Copyright © 2015 John Wiley & Sons, Ltd. High efficiency cadmium sulfide (CdS)/Sb 2 Se 3 thin film solar cells are reported by controlled addition of oxygen during thermal evaporation of Sb 2 Se 3 absorber layer. Oxygen passivates defect states at the CdS/Sb 2 Se 3 interface, resulting in a substantial enhancement in heterojunction quality. The 4.8% device efficiency is the highest thus far reported for Sb 2 Se 3 thin film solar cells.
Improving the performance of Sb2Se3 thin film solar cells over 4% by controlled addition of oxygen during film deposition
Progress in photovoltaics ; 23 , 12
2015
Article (Journal)
English
BKL: | 53.36 Energiedirektumwandler, elektrische Energiespeicher |
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