| Literature DB >> 27856902 |
Giles E Eperon1,2, Tomas Leijtens3, Kevin A Bush3, Rohit Prasanna3, Thomas Green1, Jacob Tse-Wei Wang1, David P McMeekin1, George Volonakis4, Rebecca L Milot1, Richard May2, Axel Palmstrom5, Daniel J Slotcavage3, Rebecca A Belisle3, Jay B Patel1, Elizabeth S Parrott1, Rebecca J Sutton1, Wen Ma6, Farhad Moghadam6, Bert Conings1,7, Aslihan Babayigit1,7, Hans-Gerd Boyen7, Stacey Bent5, Feliciano Giustino4, Laura M Herz1, Michael B Johnston1, Michael D McGehee8, Henry J Snaith9.
Abstract
We demonstrate four- and two-terminal perovskite-perovskite tandem solar cells with ideally matched band gaps. We develop an infrared-absorbing 1.2-electron volt band-gap perovskite, FA0.75Cs0.25Sn0.5Pb0.5I3, that can deliver 14.8% efficiency. By combining this material with a wider-band gap FA0.83Cs0.17Pb(I0.5Br0.5)3 material, we achieve monolithic two-terminal tandem efficiencies of 17.0% with >1.65-volt open-circuit voltage. We also make mechanically stacked four-terminal tandem cells and obtain 20.3% efficiency. Notably, we find that our infrared-absorbing perovskite cells exhibit excellent thermal and atmospheric stability, not previously achieved for Sn-based perovskites. This device architecture and materials set will enable "all-perovskite" thin-film solar cells to reach the highest efficiencies in the long term at the lowest costs.Entities:
Year: 2016 PMID： 27856902 DOI： 10.1126/science.aaf9717
Source DB: PubMed Journal: Science ISSN： 0036-8075 Impact factor: 47.728