Air Stable, High Efficiency, Pt‐Based Halide Perovskite Solar Cells with Long Carrier Lifetimes

Dakota Schwartz, Rubaiya Murshed, Harry Larson, Benedikt Usprung, Sina Soltanmohamad, Ramesh Pandey, Edward S. Barnard, Angus Rockett, Thomas Hartmann, Ivano Eligio Castelli, Shubhra Bansal*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The search for Pb‐free perovskite materials continues with limited success to find a suitable replacement for Pb with outstanding optoelectronic properties. Here we report Pb‐free inorganic halide perovskite Cs2PtI6 with excellent absorption coefficient, long minority carrier lifetime and optical bandgap of 1.4 eV. Atmospheric precursor based solution processing results in high quality Cs2PtI6 with absorption coefficient of for photon energies > 1.5 eV and high minority carrier lifetimes of > 2 μs indicating low defect density in the material. Superstrate n‐i‐p solar cells processed with the structure F:SnO2/CdS/Cs2PtI6/carbon/Cu show promising device efficiency of 13.88%. These planar devices processed under atmospheric conditions show low Voc deficit (< 0.3 V) without any hysteresis in forward and reverse scans indicating low trap densities. Pt offers an excellent model system for replacement of Pb due to high atomic number, oxidation resistance and stability. Cs2PtI6 is an atmospherically stable phase under AM1.5G and 65 °C upto 1000 hours.
Original languageEnglish
JournalPhysica Status Solidi. Rapid Research Letters
ISSN1862-6254
DOIs
Publication statusAccepted/In press - 2020

Cite this

Schwartz, D., Murshed, R., Larson, H., Usprung, B., Soltanmohamad, S., Pandey, R., Barnard, E. S., Rockett, A., Hartmann, T., Castelli, I. E., & Bansal, S. (Accepted/In press). Air Stable, High Efficiency, Pt‐Based Halide Perovskite Solar Cells with Long Carrier Lifetimes. Physica Status Solidi. Rapid Research Letters. https://doi.org/10.1002/pssr.202000182