Shining Light on Sulfide Perovskites: LaYS3 Material Properties and Solar Cells

Andrea Crovetto, Rasmus Nielsen, Mohnish Pandey, Lowell Watts, John G. Labram, Mathias Geisler, Nicolas Stenger, Karsten Wedel Jacobsen, Ole Hansen, Brian Seger, Ib Chorkendorff, Peter Christian Kjærgaard Vesborg*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

351 Downloads (Pure)


The sulfide perovskite LaYS3 has been recently identified as a promising wide band gap photoabsorber material by computational screening techniques. In this study, we combine experiment and theory to comprehensively characterize LaYS3 thin films produced by sulfurization of sputter-deposited precursors. An attractive feature of LaYS3 is its optimal band gap (2.0 eV) for application as a wide band gap photoabsorber in tandem solar energy conversion devices. Promisingly, the LaYS3 films are photoconductive, with a grain size in excess of 1 μm and comparable recombination time scales to state-of-the-art hybrid halide perovskite absorbers. Although the fabrication of solar cells based on LaYS3 absorbers is complicated by the high temperature necessary to grow the compound, complete solar cells could be produced in this work by growing LaYS3 on refractory metal back contacts. These are the first reported solar cells based on a sulfide perovskite absorber. A major reason for their poor performance could be the highly localized trap states observed directly by photoluminescence imaging of LaYS3, which may also explain the surprisingly long carrier lifetimes and the low carrier mobility found in this material
Original languageEnglish
JournalChemistry of Materials
Issue number9
Pages (from-to)3359-3369
Number of pages11
Publication statusPublished - 2019


Dive into the research topics of 'Shining Light on Sulfide Perovskites: LaYS3 Material Properties and Solar Cells'. Together they form a unique fingerprint.

Cite this