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Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance.
- Source :
-
Science (New York, N.Y.) [Science] 2016 Oct 14; Vol. 354 (6309), pp. 206-209. Date of Electronic Publication: 2016 Sep 29. - Publication Year :
- 2016
-
Abstract
- All of the cations currently used in perovskite solar cells abide by the tolerance factor for incorporation into the lattice. We show that the small and oxidation-stable rubidium cation (Rb <superscript>+</superscript> ) can be embedded into a "cation cascade" to create perovskite materials with excellent material properties. We achieved stabilized efficiencies of up to 21.6% (average value, 20.2%) on small areas (and a stabilized 19.0% on a cell 0.5 square centimeters in area) as well as an electroluminescence of 3.8%. The open-circuit voltage of 1.24 volts at a band gap of 1.63 electron volts leads to a loss in potential of 0.39 volts, versus 0.4 volts for commercial silicon cells. Polymer-coated cells maintained 95% of their initial performance at 85°C for 500 hours under full illumination and maximum power point tracking.<br /> (Copyright © 2016, American Association for the Advancement of Science.)
Details
- Language :
- English
- ISSN :
- 1095-9203
- Volume :
- 354
- Issue :
- 6309
- Database :
- MEDLINE
- Journal :
- Science (New York, N.Y.)
- Publication Type :
- Academic Journal
- Accession number :
- 27708053
- Full Text :
- https://doi.org/10.1126/science.aah5557