Combining Efficiency and Stability in Mixed Tin–Lead Perovskite Solar Cells by Capping Grains with an Ultrathin 2D Layer

Mingyang Wei; Ke Xiao; Grant Walters; Renxing Lin; Yongbiao Zhao; Makhsud I. Saidaminov; Petar Todorović; Andrew Johnston; Ziru Huang; Haijie Chen; Aidong Li; Jia Zhu; Zhenyu Yang; Ya-Kun Wang; Andrew H. Proppe; Shana O. Kelley; Yi Hou; Oleksandr Voznyy; Hairen Tan; E. Sargent

doi:10.1002/adma.201907058

Combining Efficiency and Stability in Mixed Tin–Lead Perovskite Solar Cells by Capping Grains with an Ultrathin 2D Layer

Mingyang Wei, Ke Xiao, Grant Walters, Renxing Lin, Yongbiao Zhao, Makhsud I. Saidaminov, Petar Todorović, Andrew Johnston, Ziru Huang, Haijie Chen, Aidong Li, Jia Zhu, Zhenyu Yang, Ya-Kun Wang, Andrew H. Proppe, Shana O. Kelley, Yi Hou, Oleksandr Voznyy, Hairen Tan, E. Sargent

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Abstract

The development of narrow-bandgap (Eg ≈ 1.2 eV) mixed tin–lead (Sn–Pb) halide perovskites enables all-perovskite tandem solar cells. Whereas pure-lead halide perovskite solar cells (PSCs) have advanced simultaneously in efficiency and stability, achieving this crucial combination remains a challenge in Sn–Pb PSCs. Here, Sn–Pb perovskite grains are anchored with ultrathin layered perovskites to overcome the efficiency-stability tradeoff. Defect passivation is achieved both on the perovskite film surface and at grain boundaries, an approach implemented by directly introducing phenethylammonium ligands in the antisolvent. This improves device operational stability and also avoids the excess formation of layered perovskites that would otherwise hinder charge transport. Sn–Pb PSCs with fill factors of 79% and a certified power conversion efficiency (PCE) of 18.95% are reported—among the highest for Sn–Pb PSCs. Using this approach, a 200-fold enhancement in device operating lifetime is achieved relative to the nonpassivated Sn–Pb PSCs under full AM1.5G illumination, and a 200 h diurnal operating time without efficiency drop is achieved under filtered AM1.5G illumination.

Original language	English (US)
Pages (from-to)	1907058
Journal	Advanced Materials
Volume	32
Issue number	12
DOIs	https://doi.org/10.1002/adma.201907058
State	Published - Mar 2020
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2021-02-08
Acknowledged KAUST grant number(s): OSR-2017-CPF-3321-03
Acknowledgements: M.W. and K.X. contributed equally to this work. This publication was based in part on work supported by the US Ofﬁce of Naval Research (Grant Award No.: N00014-17-1-2524), by an award (OSR-2017-CPF-3321-03) from the King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. The work of H.T. was supported by National Key R&D Program of China (Grant No. 2018YFB1500102), the National Natural Science Foundation of China (Grant No. 61974063), the Jiangsu Provincial Natural Science Foundation (BK20190315), and the Thousand Talent Program for Young Outstanding Scientists in China. M.I.S. acknowledges the Government of Canada’s Banting Postdoctoral Fellowship Program for ﬁnancial support.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

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10.1002/adma.201907058

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Wei, M., Xiao, K., Walters, G., Lin, R., Zhao, Y., Saidaminov, M. I., Todorović, P., Johnston, A., Huang, Z., Chen, H., Li, A., Zhu, J., Yang, Z., Wang, Y.-K., Proppe, A. H., Kelley, S. O., Hou, Y., Voznyy, O., Tan, H., & Sargent, E. (2020). Combining Efficiency and Stability in Mixed Tin–Lead Perovskite Solar Cells by Capping Grains with an Ultrathin 2D Layer. Advanced Materials, 32(12), 1907058. https://doi.org/10.1002/adma.201907058

@article{539440c8870c440ba7cdd55746ad7322,

title = "Combining Efficiency and Stability in Mixed Tin–Lead Perovskite Solar Cells by Capping Grains with an Ultrathin 2D Layer",

abstract = "The development of narrow-bandgap (Eg ≈ 1.2 eV) mixed tin–lead (Sn–Pb) halide perovskites enables all-perovskite tandem solar cells. Whereas pure-lead halide perovskite solar cells (PSCs) have advanced simultaneously in efficiency and stability, achieving this crucial combination remains a challenge in Sn–Pb PSCs. Here, Sn–Pb perovskite grains are anchored with ultrathin layered perovskites to overcome the efficiency-stability tradeoff. Defect passivation is achieved both on the perovskite film surface and at grain boundaries, an approach implemented by directly introducing phenethylammonium ligands in the antisolvent. This improves device operational stability and also avoids the excess formation of layered perovskites that would otherwise hinder charge transport. Sn–Pb PSCs with fill factors of 79% and a certified power conversion efficiency (PCE) of 18.95% are reported—among the highest for Sn–Pb PSCs. Using this approach, a 200-fold enhancement in device operating lifetime is achieved relative to the nonpassivated Sn–Pb PSCs under full AM1.5G illumination, and a 200 h diurnal operating time without efficiency drop is achieved under filtered AM1.5G illumination.",

author = "Mingyang Wei and Ke Xiao and Grant Walters and Renxing Lin and Yongbiao Zhao and Saidaminov, {Makhsud I.} and Petar Todorovi{\'c} and Andrew Johnston and Ziru Huang and Haijie Chen and Aidong Li and Jia Zhu and Zhenyu Yang and Ya-Kun Wang and Proppe, {Andrew H.} and Kelley, {Shana O.} and Yi Hou and Oleksandr Voznyy and Hairen Tan and E. Sargent",

note = "KAUST Repository Item: Exported on 2021-02-08 Acknowledged KAUST grant number(s): OSR-2017-CPF-3321-03 Acknowledgements: M.W. and K.X. contributed equally to this work. This publication was based in part on work supported by the US Ofﬁce of Naval Research (Grant Award No.: N00014-17-1-2524), by an award (OSR-2017-CPF-3321-03) from the King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. The work of H.T. was supported by National Key R&D Program of China (Grant No. 2018YFB1500102), the National Natural Science Foundation of China (Grant No. 61974063), the Jiangsu Provincial Natural Science Foundation (BK20190315), and the Thousand Talent Program for Young Outstanding Scientists in China. M.I.S. acknowledges the Government of Canada{\textquoteright}s Banting Postdoctoral Fellowship Program for ﬁnancial support. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2020",

month = mar,

doi = "10.1002/adma.201907058",

language = "English (US)",

volume = "32",

pages = "1907058",

journal = "Advanced Materials",

issn = "0935-9648",

publisher = "Wiley",

number = "12",

}

Wei, M, Xiao, K, Walters, G, Lin, R, Zhao, Y, Saidaminov, MI, Todorović, P, Johnston, A, Huang, Z, Chen, H, Li, A, Zhu, J, Yang, Z, Wang, Y-K, Proppe, AH, Kelley, SO, Hou, Y, Voznyy, O, Tan, H & Sargent, E 2020, 'Combining Efficiency and Stability in Mixed Tin–Lead Perovskite Solar Cells by Capping Grains with an Ultrathin 2D Layer', Advanced Materials, vol. 32, no. 12, pp. 1907058. https://doi.org/10.1002/adma.201907058

TY - JOUR

T1 - Combining Efficiency and Stability in Mixed Tin–Lead Perovskite Solar Cells by Capping Grains with an Ultrathin 2D Layer

AU - Wei, Mingyang

AU - Xiao, Ke

AU - Walters, Grant

AU - Lin, Renxing

AU - Zhao, Yongbiao

AU - Saidaminov, Makhsud I.

AU - Todorović, Petar

AU - Johnston, Andrew

AU - Huang, Ziru

AU - Chen, Haijie

AU - Li, Aidong

AU - Zhu, Jia

AU - Yang, Zhenyu

AU - Wang, Ya-Kun

AU - Proppe, Andrew H.

AU - Kelley, Shana O.

AU - Hou, Yi

AU - Voznyy, Oleksandr

AU - Tan, Hairen

AU - Sargent, E.

N1 - KAUST Repository Item: Exported on 2021-02-08 Acknowledged KAUST grant number(s): OSR-2017-CPF-3321-03 Acknowledgements: M.W. and K.X. contributed equally to this work. This publication was based in part on work supported by the US Ofﬁce of Naval Research (Grant Award No.: N00014-17-1-2524), by an award (OSR-2017-CPF-3321-03) from the King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. The work of H.T. was supported by National Key R&D Program of China (Grant No. 2018YFB1500102), the National Natural Science Foundation of China (Grant No. 61974063), the Jiangsu Provincial Natural Science Foundation (BK20190315), and the Thousand Talent Program for Young Outstanding Scientists in China. M.I.S. acknowledges the Government of Canada’s Banting Postdoctoral Fellowship Program for ﬁnancial support. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2020/3

Y1 - 2020/3

N2 - The development of narrow-bandgap (Eg ≈ 1.2 eV) mixed tin–lead (Sn–Pb) halide perovskites enables all-perovskite tandem solar cells. Whereas pure-lead halide perovskite solar cells (PSCs) have advanced simultaneously in efficiency and stability, achieving this crucial combination remains a challenge in Sn–Pb PSCs. Here, Sn–Pb perovskite grains are anchored with ultrathin layered perovskites to overcome the efficiency-stability tradeoff. Defect passivation is achieved both on the perovskite film surface and at grain boundaries, an approach implemented by directly introducing phenethylammonium ligands in the antisolvent. This improves device operational stability and also avoids the excess formation of layered perovskites that would otherwise hinder charge transport. Sn–Pb PSCs with fill factors of 79% and a certified power conversion efficiency (PCE) of 18.95% are reported—among the highest for Sn–Pb PSCs. Using this approach, a 200-fold enhancement in device operating lifetime is achieved relative to the nonpassivated Sn–Pb PSCs under full AM1.5G illumination, and a 200 h diurnal operating time without efficiency drop is achieved under filtered AM1.5G illumination.

AB - The development of narrow-bandgap (Eg ≈ 1.2 eV) mixed tin–lead (Sn–Pb) halide perovskites enables all-perovskite tandem solar cells. Whereas pure-lead halide perovskite solar cells (PSCs) have advanced simultaneously in efficiency and stability, achieving this crucial combination remains a challenge in Sn–Pb PSCs. Here, Sn–Pb perovskite grains are anchored with ultrathin layered perovskites to overcome the efficiency-stability tradeoff. Defect passivation is achieved both on the perovskite film surface and at grain boundaries, an approach implemented by directly introducing phenethylammonium ligands in the antisolvent. This improves device operational stability and also avoids the excess formation of layered perovskites that would otherwise hinder charge transport. Sn–Pb PSCs with fill factors of 79% and a certified power conversion efficiency (PCE) of 18.95% are reported—among the highest for Sn–Pb PSCs. Using this approach, a 200-fold enhancement in device operating lifetime is achieved relative to the nonpassivated Sn–Pb PSCs under full AM1.5G illumination, and a 200 h diurnal operating time without efficiency drop is achieved under filtered AM1.5G illumination.

UR - http://hdl.handle.net/10754/667235

UR - https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201907058

U2 - 10.1002/adma.201907058

DO - 10.1002/adma.201907058

M3 - Article

C2 - 32030824

SN - 0935-9648

VL - 32

SP - 1907058

JO - Advanced Materials

JF - Advanced Materials

IS - 12

ER -

Combining Efficiency and Stability in Mixed Tin–Lead Perovskite Solar Cells by Capping Grains with an Ultrathin 2D Layer

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