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Title: Low-bandgap mixed tin–lead iodide perovskite absorbers with long carrier lifetimes for all-perovskite tandem solar cells

Tandem solar cells using only metal-halide perovskite sub-cells are an attractive choice for next-generation solar cells. However, the progress in developing efficient all-perovskite tandem solar cells has been hindered by the lack of high-performance low-bandgap perovskite solar cells. Here in this paper, we report efficient mixed tin-lead iodide low-bandgap (~1.25 eV) perovskite solar cells with open-circuit voltages up to 0.85 V and over 70% external quantum efficiencies in the infrared wavelength range of 700-900 nm, delivering a short-circuit current density of over 29 mA cm -2 and demonstrating suitability for bottom-cell applications in all-perovskite tandem solar cells. Our low-bandgap perovskite solar cells achieve a maximum power conversion efficiency of 17.6% and a certified efficiency of 17.01% with a negligible current-voltage hysteresis. Finally, when mechanically stacked with a ~1.58 eV bandgap perovskite top cell, our best all-perovskite 4-terminal tandem solar cell shows a steady-state efficiency of 21.0%.
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [4] ;  [5] ;  [6] ;  [1]
  1. Univ. of Toledo, OH (United States). Wright Center for Photovoltaics Innovation and Commercialization (PVIC)
  2. Univ. of Toledo, OH (United States). Wright Center for Photovoltaics Innovation and Commercialization (PVIC); Wuhan Univ. (China). Key Laboratory of Artificial Micro/Nano Structures of Ministry of Education, School of Physics and Technology
  3. Univ. of Toledo, OH (United States). Wright Center for Photovoltaics Innovation and Commercialization (PVIC); Southeast Univ., Nanjing (China). Ordered Matter Science Research Center
  4. National Renewable Energy Lab. (NREL), Golden, CO (United States). Chemistry and Nanoscience Center
  5. Wuhan Univ. (China). Key Laboratory of Artificial Micro/Nano Structures of Ministry of Education, School of Physics and Technology
  6. Southeast Univ., Nanjing (China). Ordered Matter Science Research Center
Publication Date:
Report Number(s):
NREL/JA-5900-68901
Journal ID: ISSN 2058-7546
Grant/Contract Number:
AC36-08GO28308; FOA-0000990; AC02-05CH11231
Type:
Accepted Manuscript
Journal Name:
Nature Energy
Additional Journal Information:
Journal Volume: 2; Journal Issue: 4; Journal ID: ISSN 2058-7546
Publisher:
Nature Publishing Group
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S). SunShot Initiative; USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE; perovskite solar cells; tandem solar cells
OSTI Identifier:
1371834

Zhao, Dewei, Yu, Yue, Wang, Changlei, Liao, Weiqiang, Shrestha, Niraj, Grice, Corey R., Cimaroli, Alexander J., Guan, Lei, Ellingson, Randy J., Zhu, Kai, Zhao, Xingzhong, Xiong, Ren-Gen, and Yan, Yanfa. Low-bandgap mixed tin–lead iodide perovskite absorbers with long carrier lifetimes for all-perovskite tandem solar cells. United States: N. p., Web. doi:10.1038/nenergy.2017.18.
Zhao, Dewei, Yu, Yue, Wang, Changlei, Liao, Weiqiang, Shrestha, Niraj, Grice, Corey R., Cimaroli, Alexander J., Guan, Lei, Ellingson, Randy J., Zhu, Kai, Zhao, Xingzhong, Xiong, Ren-Gen, & Yan, Yanfa. Low-bandgap mixed tin–lead iodide perovskite absorbers with long carrier lifetimes for all-perovskite tandem solar cells. United States. doi:10.1038/nenergy.2017.18.
Zhao, Dewei, Yu, Yue, Wang, Changlei, Liao, Weiqiang, Shrestha, Niraj, Grice, Corey R., Cimaroli, Alexander J., Guan, Lei, Ellingson, Randy J., Zhu, Kai, Zhao, Xingzhong, Xiong, Ren-Gen, and Yan, Yanfa. 2017. "Low-bandgap mixed tin–lead iodide perovskite absorbers with long carrier lifetimes for all-perovskite tandem solar cells". United States. doi:10.1038/nenergy.2017.18. https://www.osti.gov/servlets/purl/1371834.
@article{osti_1371834,
title = {Low-bandgap mixed tin–lead iodide perovskite absorbers with long carrier lifetimes for all-perovskite tandem solar cells},
author = {Zhao, Dewei and Yu, Yue and Wang, Changlei and Liao, Weiqiang and Shrestha, Niraj and Grice, Corey R. and Cimaroli, Alexander J. and Guan, Lei and Ellingson, Randy J. and Zhu, Kai and Zhao, Xingzhong and Xiong, Ren-Gen and Yan, Yanfa},
abstractNote = {Tandem solar cells using only metal-halide perovskite sub-cells are an attractive choice for next-generation solar cells. However, the progress in developing efficient all-perovskite tandem solar cells has been hindered by the lack of high-performance low-bandgap perovskite solar cells. Here in this paper, we report efficient mixed tin-lead iodide low-bandgap (~1.25 eV) perovskite solar cells with open-circuit voltages up to 0.85 V and over 70% external quantum efficiencies in the infrared wavelength range of 700-900 nm, delivering a short-circuit current density of over 29 mA cm-2 and demonstrating suitability for bottom-cell applications in all-perovskite tandem solar cells. Our low-bandgap perovskite solar cells achieve a maximum power conversion efficiency of 17.6% and a certified efficiency of 17.01% with a negligible current-voltage hysteresis. Finally, when mechanically stacked with a ~1.58 eV bandgap perovskite top cell, our best all-perovskite 4-terminal tandem solar cell shows a steady-state efficiency of 21.0%.},
doi = {10.1038/nenergy.2017.18},
journal = {Nature Energy},
number = 4,
volume = 2,
place = {United States},
year = {2017},
month = {3}
}

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