23.2% efficient low band gap perovskite solar cells with cyanogen management †

W. Hashini K. Perera; Thomas Webb; Yuliang Xu; Jingwei Zhu; Yundong Zhou; Gustavo F. Trindade; Mateus G. Masteghin; Steven P. Harvey; Sandra Jenatsch; Linjie Dai; Sanjayan Sathasivam; Thomas J. Macdonald; Steven J. Hinder; Yunlong Zhao; Samuel D. Stranks; Dewei Zhao; Wei Zhang; K. D. G. Imalka Jayawardena; Saif A. Haque; S. Ravi P. Silva

doi:10.1039/d4ee03001j

23.2% efficient low band gap perovskite solar cells with cyanogen management †

W. Hashini K. Perera
, Thomas Webb
, Yuliang Xu
, Jingwei Zhu
, Yundong Zhou
, Gustavo F. Trindade
, Mateus G. Masteghin
, Steven P. Harvey
, Sandra Jenatsch
, Linjie Dai
, Sanjayan Sathasivam
, Thomas J. Macdonald
, Steven J. Hinder
, Yunlong Zhao
, Samuel D. Stranks
, Dewei Zhao
, Wei Zhang
, K. D. G. Imalka Jayawardena
, Saif A. Haque
, S. Ravi P. Silva

Advanced Technology Institute, School of Computer Science and Electronic Engineering, University of Surrey, Guildford, Surrey GU2 7XH, UK
Department of Chemistry and Centre for Processable Electronics, Molecular Sciences Research Hub, Imperial College London, London W12 0BZ, U.K.
College of Materials Science and Engineering and Engineering Research Centre of Alternative Energy Materials and Devices, Ministry of Education, Sichuan University, Chengdu 610065, China
National Physical Laboratory, NiCE-MSI, Teddington TW11 0LW, UK
Materials Science Centre, National Renewable Energy Laboratory, Golden, Colorado 80401, USA
Fluxim AG, Katharina-Sulzer-Platz 2, 8406 Winterthur, Switzerland
Department of Physics, Cavendish Laboratory, University of Cambridge
School of Engineering, London South Bank University
University College London, Department of Chemistry, Materials Chemistry Centre
Department of Electronic & Electrical Engineering, University College London, London WC1E 7JE, UK
The Surface Analysis Laboratory, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK
Dyson School of Design Engineering, Imperial College London, London SW7 2BX, UK

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

24 Citations (Scopus)

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Abstract

Managing iodine formation is crucial for realising efficient and stable perovskite photovoltaics. Poly(3,4-ethylenedioxythiophene)polystyrene sulfonate (PEDOT:PSS) is a widely adopted hole transport material, particularly for perovskite solar cells (PSCs). However, improving the performance and stability of PEDOT:PSS based perovskite optoelectronics remains a key challenge. We show that amine-containing organic cations de-dope PEDOT:PSS, causing performance loss, which is partially recovered with thiocyanate additives. However, this comes at the expense of device stability due to cyanogen formation from thiocyanate–iodine interaction which is accelerated in the presence of moisture. To mitigate this degradation pathway, we incorporate an iodine reductant in lead–tin PSCs. The resulting devices show an improved power conversion efficiency of 23.2% which is among the highest reported for lead–tin PSCs, and ∼66% enhancement in the TS80 lifetime under maximum power point tracking and ambient conditions. These findings offer insights for designing next-generation hole extraction materials for more efficient and stable PSCs.

Original language	English
Pages (from-to)	439-453
Number of pages	15
Journal	Energy and Environmental Science
Volume	18
Issue number	1
Early online date	14 Nov 2024
DOIs	https://doi.org/10.1039/d4ee03001j
Publication status	Published - 14 Nov 2024

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Perera, W. H. K., Webb, T., Xu, Y., Zhu, J., Zhou, Y., Trindade, G. F., Masteghin, M. G., Harvey, S. P., Jenatsch, S., Dai, L., Sathasivam, S., Macdonald, T. J., Hinder, S. J., Zhao, Y., Stranks, S. D., Zhao, D., Zhang, W., Jayawardena, K. D. G. I., Haque, S. A., & Silva, S. R. P. (2024). 23.2% efficient low band gap perovskite solar cells with cyanogen management †. Energy and Environmental Science, 18(1), 439-453. https://doi.org/10.1039/d4ee03001j

@article{99b0be598762406391b1ddd5625e5295,

title = "23.2\% efficient low band gap perovskite solar cells with cyanogen management †",

abstract = "Managing iodine formation is crucial for realising efficient and stable perovskite photovoltaics. Poly(3,4-ethylenedioxythiophene)polystyrene sulfonate (PEDOT:PSS) is a widely adopted hole transport material, particularly for perovskite solar cells (PSCs). However, improving the performance and stability of PEDOT:PSS based perovskite optoelectronics remains a key challenge. We show that amine-containing organic cations de-dope PEDOT:PSS, causing performance loss, which is partially recovered with thiocyanate additives. However, this comes at the expense of device stability due to cyanogen formation from thiocyanate{\textendash}iodine interaction which is accelerated in the presence of moisture. To mitigate this degradation pathway, we incorporate an iodine reductant in lead{\textendash}tin PSCs. The resulting devices show an improved power conversion efficiency of 23.2\% which is among the highest reported for lead{\textendash}tin PSCs, and ∼66\% enhancement in the TS80 lifetime under maximum power point tracking and ambient conditions. These findings offer insights for designing next-generation hole extraction materials for more efficient and stable PSCs.",

author = "Perera, \{W. Hashini K.\} and Thomas Webb and Yuliang Xu and Jingwei Zhu and Yundong Zhou and Trindade, \{Gustavo F.\} and Masteghin, \{Mateus G.\} and Harvey, \{Steven P.\} and Sandra Jenatsch and Linjie Dai and Sanjayan Sathasivam and Macdonald, \{Thomas J.\} and Hinder, \{Steven J.\} and Yunlong Zhao and Stranks, \{Samuel D.\} and Dewei Zhao and Wei Zhang and Jayawardena, \{K. D. G. Imalka\} and Haque, \{Saif A.\} and Silva, \{S. Ravi P.\}",

year = "2024",

month = nov,

day = "14",

doi = "10.1039/d4ee03001j",

language = "English",

volume = "18",

pages = "439--453",

journal = "Energy and Environmental Science",

issn = "1754-5692",

publisher = "Royal Society of Chemistry",

number = "1",

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Perera, WHK, Webb, T, Xu, Y, Zhu, J, Zhou, Y, Trindade, GF, Masteghin, MG, Harvey, SP, Jenatsch, S, Dai, L, Sathasivam, S, Macdonald, TJ, Hinder, SJ, Zhao, Y, Stranks, SD, Zhao, D, Zhang, W, Jayawardena, KDGI, Haque, SA & Silva, SRP 2024, '23.2% efficient low band gap perovskite solar cells with cyanogen management †', Energy and Environmental Science, vol. 18, no. 1, pp. 439-453. https://doi.org/10.1039/d4ee03001j

TY - JOUR

T1 - 23.2% efficient low band gap perovskite solar cells with cyanogen management †

AU - Perera, W. Hashini K.

AU - Webb, Thomas

AU - Xu, Yuliang

AU - Zhu, Jingwei

AU - Zhou, Yundong

AU - Trindade, Gustavo F.

AU - Masteghin, Mateus G.

AU - Harvey, Steven P.

AU - Jenatsch, Sandra

AU - Dai, Linjie

AU - Sathasivam, Sanjayan

AU - Macdonald, Thomas J.

AU - Hinder, Steven J.

AU - Zhao, Yunlong

AU - Stranks, Samuel D.

AU - Zhao, Dewei

AU - Zhang, Wei

AU - Jayawardena, K. D. G. Imalka

AU - Haque, Saif A.

AU - Silva, S. Ravi P.

PY - 2024/11/14

Y1 - 2024/11/14

N2 - Managing iodine formation is crucial for realising efficient and stable perovskite photovoltaics. Poly(3,4-ethylenedioxythiophene)polystyrene sulfonate (PEDOT:PSS) is a widely adopted hole transport material, particularly for perovskite solar cells (PSCs). However, improving the performance and stability of PEDOT:PSS based perovskite optoelectronics remains a key challenge. We show that amine-containing organic cations de-dope PEDOT:PSS, causing performance loss, which is partially recovered with thiocyanate additives. However, this comes at the expense of device stability due to cyanogen formation from thiocyanate–iodine interaction which is accelerated in the presence of moisture. To mitigate this degradation pathway, we incorporate an iodine reductant in lead–tin PSCs. The resulting devices show an improved power conversion efficiency of 23.2% which is among the highest reported for lead–tin PSCs, and ∼66% enhancement in the TS80 lifetime under maximum power point tracking and ambient conditions. These findings offer insights for designing next-generation hole extraction materials for more efficient and stable PSCs.

AB - Managing iodine formation is crucial for realising efficient and stable perovskite photovoltaics. Poly(3,4-ethylenedioxythiophene)polystyrene sulfonate (PEDOT:PSS) is a widely adopted hole transport material, particularly for perovskite solar cells (PSCs). However, improving the performance and stability of PEDOT:PSS based perovskite optoelectronics remains a key challenge. We show that amine-containing organic cations de-dope PEDOT:PSS, causing performance loss, which is partially recovered with thiocyanate additives. However, this comes at the expense of device stability due to cyanogen formation from thiocyanate–iodine interaction which is accelerated in the presence of moisture. To mitigate this degradation pathway, we incorporate an iodine reductant in lead–tin PSCs. The resulting devices show an improved power conversion efficiency of 23.2% which is among the highest reported for lead–tin PSCs, and ∼66% enhancement in the TS80 lifetime under maximum power point tracking and ambient conditions. These findings offer insights for designing next-generation hole extraction materials for more efficient and stable PSCs.

UR - https://pubs.rsc.org/en/content/articlelanding/2024/ee/d4ee03001j

U2 - 10.1039/d4ee03001j

DO - 10.1039/d4ee03001j

M3 - Article

SN - 1754-5692

VL - 18

SP - 439

EP - 453

JO - Energy and Environmental Science

JF - Energy and Environmental Science

IS - 1

ER -

23.2% efficient low band gap perovskite solar cells with cyanogen management †

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