High-efficient Sb2Se3 solar cell using Zn<i>x</i>Cd1-<i>x</i>S n-type layer
Chao Chen, Xinxing Liu, Kanghua Li, Shuaicheng Lu, Siyu Wang, Sen Li, Yue Lu, Jungang He, Jiajia Zheng, Xuetian Lin, Jiang Tang
Abstract
Sb2Se3 has drawn wide attention in thin-film solar cells in recent years because of its advantages of low-cost, low-toxic, and physicochemically stable properties. The most efficient Sb2Se3 solar cells are based on a CdS/Sb2Se3 heterojunction, but the cliff-like conduction band offset at the CdS/Sb2Se3 interface causes detrimental interface recombination. In this Letter, we apply the ZnxCd1-xS to tune the interface band alignment. When x is equal to 0.163, the flatband results in an optimal efficiency of 7.02%, which is absolutely 0.6% higher than the control device with pure CdS.
Topics & Concepts
HeterojunctionConduction bandBand offsetSolar cellOptoelectronicsThin film solar cellLayer (electronics)Materials scienceOffset (computer science)Thin filmInterface (matter)NanotechnologyValence bandComputer scienceBand gapElectronPhysicsComposite materialQuantum mechanicsCapillary actionCapillary numberProgramming languageChalcogenide Semiconductor Thin FilmsQuantum Dots Synthesis And PropertiesPerovskite Materials and Applications