Suppressed deprotonation enables a durable buried interface in tin-lead perovskite for all-perovskite tandem solar cells

Sheng Fu; Nannan Sun; Yeming Xian; Lei Chen; You Li; Chongwen Li; Abasi Abudulimu; Prabodika N. Kaluarachchi; Zixu Huang; Xiaoming Wang; Kshitiz Dolia; David S. Ginger; Michael J. Heben; Randy J. Ellingson; Bin Chen; Edward H. Sargent; Zhaoning Song; Yanfa Yan

doi:10.1016/j.joule.2024.05.007

Suppressed deprotonation enables a durable buried interface in tin-lead perovskite for all-perovskite tandem solar cells

Sheng Fu^*
, Nannan Sun
, Yeming Xian
, Lei Chen
, You Li
, Chongwen Li
, Abasi Abudulimu
, Prabodika N. Kaluarachchi
, Zixu Huang
, Xiaoming Wang
, Kshitiz Dolia
, David S. Ginger
, Michael J. Heben
, Randy J. Ellingson
, Bin Chen
, Edward H. Sargent
, Zhaoning Song^*
, Yanfa Yan^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

60 Scopus citations

Abstract

Low-band-gap tin (Sn)-lead (Pb) perovskites are a critical component in all-perovskite tandem solar cells (APTSCs). Current state-of-the-art Sn-Pb perovskite devices exclusively use poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) as the hole-transport layer (HTL) but suffer from undesired buried-interface degradation. Here, we show that the deprotonation of the –SO₃H group in PSS is the root cause of the interface degradation due to its low acid dissociation constant (pK_a), leading to acidic erosion and iodine volatilization in Sn-Pb perovskites. We identify that HTL featuring the carboxyl (–COOH) group with a higher pK_a, such as poly[3-(4-carboxybutyl)thiophene-2,5-diyl] (P3CT), can suppress deprotonation and strengthen the interface, mitigating the buried-interface degradation. Motivated by established P3CT modification, we introduce Pb doping to P3CT to increase its work function and reduce interfacial energy loss. We fabricate APTSCs with a champion efficiency of 27.8% and an operational lifetime of over 1,000 h, with 97% retaining efficiency under maximum power point tracking.

Original language	English
Pages (from-to)	2220-2237
Number of pages	18
Journal	Joule
Volume	8
Issue number	8
DOIs	https://doi.org/10.1016/j.joule.2024.05.007
State	Published - 21 Aug 2024
Externally published	Yes

Keywords

P3CT
acid dissociation
all-perovskite tandem solar cells
buried-interface degradation
hole-transport layer

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10.1016/j.joule.2024.05.007

Cite this

Fu, S., Sun, N., Xian, Y., Chen, L., Li, Y., Li, C., Abudulimu, A., Kaluarachchi, P. N., Huang, Z., Wang, X., Dolia, K., Ginger, D. S., Heben, M. J., Ellingson, R. J., Chen, B., Sargent, E. H., Song, Z., & Yan, Y. (2024). Suppressed deprotonation enables a durable buried interface in tin-lead perovskite for all-perovskite tandem solar cells. Joule, 8(8), 2220-2237. https://doi.org/10.1016/j.joule.2024.05.007

@article{ace0366a043048d3b703e5aa51f91998,

title = "Suppressed deprotonation enables a durable buried interface in tin-lead perovskite for all-perovskite tandem solar cells",

abstract = "Low-band-gap tin (Sn)-lead (Pb) perovskites are a critical component in all-perovskite tandem solar cells (APTSCs). Current state-of-the-art Sn-Pb perovskite devices exclusively use poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) as the hole-transport layer (HTL) but suffer from undesired buried-interface degradation. Here, we show that the deprotonation of the –SO3H group in PSS is the root cause of the interface degradation due to its low acid dissociation constant (pKa), leading to acidic erosion and iodine volatilization in Sn-Pb perovskites. We identify that HTL featuring the carboxyl (–COOH) group with a higher pKa, such as poly[3-(4-carboxybutyl)thiophene-2,5-diyl] (P3CT), can suppress deprotonation and strengthen the interface, mitigating the buried-interface degradation. Motivated by established P3CT modification, we introduce Pb doping to P3CT to increase its work function and reduce interfacial energy loss. We fabricate APTSCs with a champion efficiency of 27.8\% and an operational lifetime of over 1,000 h, with 97\% retaining efficiency under maximum power point tracking.",

keywords = "P3CT, acid dissociation, all-perovskite tandem solar cells, buried-interface degradation, hole-transport layer",

author = "Sheng Fu and Nannan Sun and Yeming Xian and Lei Chen and You Li and Chongwen Li and Abasi Abudulimu and Kaluarachchi, \{Prabodika N.\} and Zixu Huang and Xiaoming Wang and Kshitiz Dolia and Ginger, \{David S.\} and Heben, \{Michael J.\} and Ellingson, \{Randy J.\} and Bin Chen and Sargent, \{Edward H.\} and Zhaoning Song and Yanfa Yan",

note = "Publisher Copyright: {\textcopyright} 2024 Elsevier Inc.",

year = "2024",

month = aug,

day = "21",

doi = "10.1016/j.joule.2024.05.007",

language = "英语",

volume = "8",

pages = "2220--2237",

journal = "Joule",

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}

Fu, S, Sun, N, Xian, Y, Chen, L, Li, Y, Li, C, Abudulimu, A, Kaluarachchi, PN, Huang, Z, Wang, X, Dolia, K, Ginger, DS, Heben, MJ, Ellingson, RJ, Chen, B, Sargent, EH, Song, Z & Yan, Y 2024, 'Suppressed deprotonation enables a durable buried interface in tin-lead perovskite for all-perovskite tandem solar cells', Joule, vol. 8, no. 8, pp. 2220-2237. https://doi.org/10.1016/j.joule.2024.05.007

TY - JOUR

T1 - Suppressed deprotonation enables a durable buried interface in tin-lead perovskite for all-perovskite tandem solar cells

AU - Fu, Sheng

AU - Sun, Nannan

AU - Xian, Yeming

AU - Chen, Lei

AU - Li, You

AU - Li, Chongwen

AU - Abudulimu, Abasi

AU - Kaluarachchi, Prabodika N.

AU - Huang, Zixu

AU - Wang, Xiaoming

AU - Dolia, Kshitiz

AU - Ginger, David S.

AU - Heben, Michael J.

AU - Ellingson, Randy J.

AU - Chen, Bin

AU - Sargent, Edward H.

AU - Song, Zhaoning

AU - Yan, Yanfa

PY - 2024/8/21

Y1 - 2024/8/21

N2 - Low-band-gap tin (Sn)-lead (Pb) perovskites are a critical component in all-perovskite tandem solar cells (APTSCs). Current state-of-the-art Sn-Pb perovskite devices exclusively use poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) as the hole-transport layer (HTL) but suffer from undesired buried-interface degradation. Here, we show that the deprotonation of the –SO3H group in PSS is the root cause of the interface degradation due to its low acid dissociation constant (pKa), leading to acidic erosion and iodine volatilization in Sn-Pb perovskites. We identify that HTL featuring the carboxyl (–COOH) group with a higher pKa, such as poly[3-(4-carboxybutyl)thiophene-2,5-diyl] (P3CT), can suppress deprotonation and strengthen the interface, mitigating the buried-interface degradation. Motivated by established P3CT modification, we introduce Pb doping to P3CT to increase its work function and reduce interfacial energy loss. We fabricate APTSCs with a champion efficiency of 27.8% and an operational lifetime of over 1,000 h, with 97% retaining efficiency under maximum power point tracking.

AB - Low-band-gap tin (Sn)-lead (Pb) perovskites are a critical component in all-perovskite tandem solar cells (APTSCs). Current state-of-the-art Sn-Pb perovskite devices exclusively use poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) as the hole-transport layer (HTL) but suffer from undesired buried-interface degradation. Here, we show that the deprotonation of the –SO3H group in PSS is the root cause of the interface degradation due to its low acid dissociation constant (pKa), leading to acidic erosion and iodine volatilization in Sn-Pb perovskites. We identify that HTL featuring the carboxyl (–COOH) group with a higher pKa, such as poly[3-(4-carboxybutyl)thiophene-2,5-diyl] (P3CT), can suppress deprotonation and strengthen the interface, mitigating the buried-interface degradation. Motivated by established P3CT modification, we introduce Pb doping to P3CT to increase its work function and reduce interfacial energy loss. We fabricate APTSCs with a champion efficiency of 27.8% and an operational lifetime of over 1,000 h, with 97% retaining efficiency under maximum power point tracking.

KW - P3CT

KW - acid dissociation

KW - all-perovskite tandem solar cells

KW - buried-interface degradation

KW - hole-transport layer

UR - https://www.scopus.com/pages/publications/85197078239

U2 - 10.1016/j.joule.2024.05.007

DO - 10.1016/j.joule.2024.05.007

M3 - 文章

AN - SCOPUS:85197078239

SN - 2542-4351

VL - 8

SP - 2220

EP - 2237

JO - Joule

JF - Joule

IS - 8

ER -

Suppressed deprotonation enables a durable buried interface in tin-lead perovskite for all-perovskite tandem solar cells

Abstract

Keywords

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