Highly Efficient Perovskite-Perovskite Tandem Solar Cells Reaching 80% of the Theoretical Limit in Photovoltage

Rajagopal, Adharsh; Yang, Zhibin; Jo, Sae Byeok; Braly, Ian L.; Liang, Po-Wei; Hillhouse, Hugh W.; Jen, Alex K. -Y.

doi:10.1002/adma.201702140

Highly Efficient Perovskite-Perovskite Tandem Solar Cells Reaching 80% of the Theoretical Limit in Photovoltage

Journal Article · Mon Jul 10 00:00:00 EDT 2017 · Advanced Materials

DOI:https://doi.org/10.1002/adma.201702140· OSTI ID:1533046

Rajagopal, Adharsh ^[1]; Yang, Zhibin ^[2]; Jo, Sae Byeok ^[2]; Braly, Ian L. ^[3]; Liang, Po-Wei ^[2]; Hillhouse, Hugh W. ^[3]; Jen, Alex K. -Y. ^[4]

Univ. of Washington, Seattle, WA (United States). Dept. of Materials Science and Engineering; DOE/OSTI
Univ. of Washington, Seattle, WA (United States). Dept. of Materials Science and Engineering
Univ. of Washington, Seattle, WA (United States). Dept. of Chemical Engineering. Molecular Engineering and Sciences Inst.
Univ. of Washington, Seattle, WA (United States). Dept. of Materials Science and Engineering; City Univ. of Hong Kong (Hong Kong). Dept. of Biology and Chemistry

Organic–inorganic hybrid perovskite multijunction solar cells have immense potential to realize power conversion efficiencies (PCEs) beyond the Shockley–Queisser limit of single-junction solar cells; however, they are limited by large nonideal photovoltage loss (V _oc,loss) in small- and large-bandgap subcells. Here, an integrated approach is utilized to improve the V _oc of subcells with optimized bandgaps and fabricate perovskite–perovskite tandem solar cells with small V _oc,loss. A fullerene variant, Indene-C₆₀ bis-adduct, is used to achieve optimized interfacial contact in a small-bandgap (≈1.2 eV) subcell, which facilitates higher quasi-Fermi level splitting, reduces nonradiative recombination, alleviates hysteresis instabilities, and improves V _oc to 0.84 V. Compositional engineering of large-bandgap (≈1.8 eV) perovskite is employed to realize a subcell with a transparent top electrode and photostabilized V _oc of 1.22 V. The resultant monolithic perovskite–perovskite tandem solar cell shows a high V _oc of 1.98 V (approaching 80% of the theoretical limit) and a stabilized PCE of 18.5%. The significantly minimized nonideal V _oc,loss is better than state-of-the-art silicon–perovskite tandem solar cells, which highlights the prospects of using perovskite–perovskite tandems for solar-energy generation. It also unlocks opportunities for solar water splitting using hybrid perovskites with solar-to-hydrogen efficiencies beyond 15%.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of Washington, Seattle, WA (United States)

Sponsoring Organization:: Asian Office of Aerospace Research and Development (AOARD) (United States); National Science Foundation (NSF) (United States); Ofﬁce of Naval Research (ONR) (United States); USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

Grant/Contract Number:: EE0006710

OSTI ID:: 1533046

Alternate ID(s):: OSTI ID: 1380026

Journal Information:: Advanced Materials, Journal Name: Advanced Materials Journal Issue: 34 Vol. 29; ISSN 0935-9648

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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A cascade-type electron extraction design for efficient low-bandgap perovskite solar cells based on a conventional structure with suppressed open-circuit voltage loss Liu, Meiyue; Chen, Ziming; Chen, Zhen Materials Chemistry Frontiers, Vol. 3, Issue 3 https://doi.org/10.1039/c8qm00620b	journal	January 2019
Tin–lead halide perovskites with improved thermal and air stability for efficient all-perovskite tandem solar cells Leijtens, Tomas; Prasanna, Rohit; Bush, Kevin A. Sustainable Energy & Fuels, Vol. 2, Issue 11 https://doi.org/10.1039/c8se00314a	journal	January 2018
High performance low-bandgap perovskite solar cells based on a high-quality mixed Sn–Pb perovskite film prepared by vacuum-assisted thermal annealing Liu, Meiyue; Chen, Ziming; Xue, Qifan Journal of Materials Chemistry A, Vol. 6, Issue 34 https://doi.org/10.1039/c8ta05444d	journal	January 2018
Revealing the origin of voltage loss in mixed-halide perovskite solar cells Mahesh, Suhas; Ball, James M.; Oliver, Robert D. J. Energy & Environmental Science, Vol. 13, Issue 1 https://doi.org/10.1039/c9ee02162k	journal	January 2020
Reduced open-circuit voltage loss for highly efficient low-bandgap perovskite solar cells via suppression of silver diffusion Liu, Meiyue; Chen, Ziming; Yang, Yongchao Journal of Materials Chemistry A, Vol. 7, Issue 29 https://doi.org/10.1039/c9ta04366g	journal	January 2019
On understanding bandgap bowing and optoelectronic quality in Pb–Sn alloy hybrid perovskites Rajagopal, Adharsh; Stoddard, Ryan J.; Hillhouse, Hugh W. Journal of Materials Chemistry A, Vol. 7, Issue 27 https://doi.org/10.1039/c9ta05308e	journal	January 2019
Tin( iv ) dopant removal through anti-solvent engineering enabling tin based perovskite solar cells with high charge carrier mobilities Bandara, R. M. I.; Jayawardena, K. D. G. I.; Adeyemo, S. O. Journal of Materials Chemistry C, Vol. 7, Issue 27 https://doi.org/10.1039/c9tc02003a	journal	January 2019
Thin‐film solar cells exceeding 22% solar cell efficiency: An overview on CdTe-, Cu(In,Ga)Se ₂ -, and perovskite-based materials Powalla, Michael; Paetel, Stefan; Ahlswede, Erik Applied Physics Reviews, Vol. 5, Issue 4 https://doi.org/10.1063/1.5061809	journal	December 2018
Wide-bandgap, low-bandgap, and tandem perovskite solar cells Song, Zhaoning; Chen, Cong; Li, Chongwen Semiconductor Science and Technology, Vol. 34, Issue 9 https://doi.org/10.1088/1361-6641/ab27f7	journal	July 2019
Carrier lifetimes of >1 μs in Sn-Pb perovskites enable efficient all-perovskite tandem solar cells Tong, Jinhui; Song, Zhaoning; Kim, Dong Hoe Science, Vol. 364, Issue 6439 https://doi.org/10.1126/science.aav7911	journal	April 2019
Tin(iv) dopant removal through anti-solvent engineering enabling tin based perovskite solar cells with high charge carrier mobilities Bandara, Rmi; Jayawardena, Kdgi; Adeyemo, Stephanie Apollo - University of Cambridge Repository https://doi.org/10.17863/cam.40441	text	January 2019

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