Carrier lifetimes of >1 μs in Sn-Pb perovskites enable efficient all-perovskite tandem solar cells.

Autor: Tong J; National Renewable Energy Laboratory, Golden, CO 80401, USA.; Renewable and Sustainable Energy Institute, University of Colorado, Boulder, CO 80309, USA., Song Z; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, University of Toledo, Toledo, OH 43606, USA., Kim DH; National Renewable Energy Laboratory, Golden, CO 80401, USA., Chen X; National Renewable Energy Laboratory, Golden, CO 80401, USA., Chen C; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, University of Toledo, Toledo, OH 43606, USA., Palmstrom AF; National Renewable Energy Laboratory, Golden, CO 80401, USA., Ndione PF; National Renewable Energy Laboratory, Golden, CO 80401, USA., Reese MO; National Renewable Energy Laboratory, Golden, CO 80401, USA., Dunfield SP; National Renewable Energy Laboratory, Golden, CO 80401, USA.; Renewable and Sustainable Energy Institute, University of Colorado, Boulder, CO 80309, USA.; Materials Science and Engineering Program, University of Colorado, Boulder, CO 80309, USA., Reid OG; National Renewable Energy Laboratory, Golden, CO 80401, USA.; Renewable and Sustainable Energy Institute, University of Colorado, Boulder, CO 80309, USA., Liu J; National Renewable Energy Laboratory, Golden, CO 80401, USA., Zhang F; National Renewable Energy Laboratory, Golden, CO 80401, USA., Harvey SP; National Renewable Energy Laboratory, Golden, CO 80401, USA., Li Z; National Renewable Energy Laboratory, Golden, CO 80401, USA., Christensen ST; National Renewable Energy Laboratory, Golden, CO 80401, USA., Teeter G; National Renewable Energy Laboratory, Golden, CO 80401, USA., Zhao D; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, University of Toledo, Toledo, OH 43606, USA., Al-Jassim MM; National Renewable Energy Laboratory, Golden, CO 80401, USA., van Hest MFAM; National Renewable Energy Laboratory, Golden, CO 80401, USA., Beard MC; National Renewable Energy Laboratory, Golden, CO 80401, USA., Shaheen SE; Renewable and Sustainable Energy Institute, University of Colorado, Boulder, CO 80309, USA.; Department of Electrical, Computer and Energy Engineering, University of Colorado, Boulder, CO 80309, USA., Berry JJ; National Renewable Energy Laboratory, Golden, CO 80401, USA. kai.zhu@nrel.gov joe.berry@nrel.gov yanfa.yan@utoledo.edu., Yan Y; Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization, University of Toledo, Toledo, OH 43606, USA. kai.zhu@nrel.gov joe.berry@nrel.gov yanfa.yan@utoledo.edu., Zhu K; National Renewable Energy Laboratory, Golden, CO 80401, USA. kai.zhu@nrel.gov joe.berry@nrel.gov yanfa.yan@utoledo.edu.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2019 May 03; Vol. 364 (6439), pp. 475-479. Date of Electronic Publication: 2019 Apr 18.
DOI: 10.1126/science.aav7911
Abstrakt: All-perovskite-based polycrystalline thin-film tandem solar cells have the potential to deliver efficiencies of >30%. However, the performance of all-perovskite-based tandem devices has been limited by the lack of high-efficiency, low-band gap tin-lead (Sn-Pb) mixed-perovskite solar cells (PSCs). We found that the addition of guanidinium thiocyanate (GuaSCN) resulted in marked improvements in the structural and optoelectronic properties of Sn-Pb mixed, low-band gap (~1.25 electron volt) perovskite films. The films have defect densities that are lower by a factor of 10, leading to carrier lifetimes of greater than 1 microsecond and diffusion lengths of 2.5 micrometers. These improved properties enable our demonstration of >20% efficient low-band gap PSCs. When combined with wider-band gap PSCs, we achieve 25% efficient four-terminal and 23.1% efficient two-terminal all-perovskite-based polycrystalline thin-film tandem solar cells.
(Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje