Revealing composition and structure dependent deep-level defect in antimony trisulfide photovoltaics

Abstract Antimony trisulfide (Sb 2 S 3 ) is a kind of emerging light-harvesting material with excellent stability and abundant elemental storage. Due to the quasi-one-dimensional symmetry, theoretical investigations have pointed out that there exist complicated defect properties. However, no experimental verification on property. Here, we conduct optical deep-level transient spectroscopy investigate properties in Sb show are maximum three kinds defects observed, depending composition . We also find Sb-interstitial i does not critical influence carrier lifetime, indicating high tolerance one-dimensional crystal structure where space 4 6 n ribbons able accommodate impurities certain extent. This study provides basic understanding materials guidance for efficiency improvement solar cells.