Abstract
Mixed tin (Sn)-lead (Pb) perovskites with high Sn content exhibit low bandgaps suitable for fabricating the bottom cell of perovskite-based tandem solar cells. In this work, we report on the fabrication of efficient mixed Sn-Pb perovskite solar cells using precursors combining formamidinium tin iodide (FASnI3) and methylammonium lead iodide (MAPbI3). The best-performing cell fabricated using a (FASnI3)0.6(MAPbI3)0.4 absorber with an absorption edge of â1.2 eV achieved a power conversion efficiency (PCE) of 15.08 (15.00)% with an open-circuit voltage of 0.795 (0.799) V, a short-circuit current density of 26.86(26.82) mA/cm2, and a fill factor of 70.6(70.0)% when measured under forward (reverse) voltage scan. The average PCE of 50 cells we have fabricated is 14.39 ± 0.33%, indicating good reproducibility.
Original language | American English |
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Pages (from-to) | 12360-12363 |
Number of pages | 4 |
Journal | Journal of the American Chemical Society |
Volume | 138 |
Issue number | 38 |
DOIs | |
State | Published - 28 Sep 2016 |
Bibliographical note
Publisher Copyright:© 2016 American Chemical Society.
NREL Publication Number
- NREL/JA-5900-67260
Keywords
- formamidinium tin iodide
- methylammonium lead iodide
- perovskites solar cells
- precusors