Trap passivation and suppressed electrochemical dynamics in perovskite solar cells with C60 interlayers

Tulus; Loreta A. Muscarella; Yulia Galagan; Simon Christian Boehme; Elizabeth von Hauff

doi:10.1016/j.electacta.2022.141215

Trap passivation and suppressed electrochemical dynamics in perovskite solar cells with C₆₀ interlayers

Tulus, Loreta A. Muscarella, Yulia Galagan, Simon Christian Boehme, Elizabeth von Hauff^*

^*Corresponding author for this work

Research output: Contribution to Journal › Article › Academic › peer-review

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Abstract

In this study, we quantify the impact of C₆₀-passivation layers in Cs_0.15FA_0.85PbI_2.75Br_0.25 double-cation perovskite solar cells. We apply a combination of impedance spectroscopy, photoluminescence (PL) spectroscopy, and X-ray diffraction (XRD) to identify the origin for the increase in power conversion efficiencies and operational stability for solar cells fabricated with C₆₀/ZnO electron transport layer (ETL) versus reference cells with a ZnO ETL. XRD reveals an increase in PbI₂ while PL spectroscopy reveals an increase in Br-rich regions in the perovskite bulk in devices containing C₆₀ interlayers. We apply impedance spectroscopy to quantify the electrochemical dynamics in both solar cell architectures. Solar cells with C₆₀/ZnO ETL demonstrate less pronounced and slower electrochemical dynamics in the impedance spectra than solar cells with ZnO ETL. We conclude that C₆₀ leads to the formation of PbI₂-rich and Br-rich domains in the perovskite absorber layer, resulting in reduced recombination losses and improved operational stability.

Original language	English
Article number	141215
Pages (from-to)	1-10
Number of pages	10
Journal	Electrochimica Acta
Volume	433
Early online date	20 Sept 2022
DOIs	https://doi.org/10.1016/j.electacta.2022.141215
Publication status	Published - 20 Nov 2022

Bibliographical note

Funding Information:
The Authors thank Damian Glowienka, Isabelli Fabiano, Andreas Peukert and Nadine Tchamba Yimga for assistance with the experiments. Tulus acknowledges the National Research and Innovation Agency (BRIN), the Republic of Indonesia for the scholarship Program for Research and Innovation in Science and Technology (RISET-Pro) World Bank Loan No. 8245-ID . Tulus, Elizabeth von Hauff and Yulia Galagan acknowledge the COST Action Stable Next Generation Photovoltaics (Grant No. MP1307 ) for support. Yulia Galagan acknowledges the Ministry of Science and Technology of Taiwan (MOST) for supporting the project 110-2222-E-002-001-MY . Simon C. Boehme acknowledges The Netherlands Organization of Scientific Research (NWO) for financial support through the Innovational Research Incentives (Veni) Scheme (Grant No. 722.017.011 ).

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

C
Equivalent circuit model
Impedance spectroscopy
Perovskite
Solar cell
Transport layer
ZnO

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10.1016/j.electacta.2022.141215

Trap passivation and suppressed electrochemical dynamics in perovskite solar cells with C60 interlayersFinal published version, 5.31 MBLicence: Article 25fa Dutch Copyright Act

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title = "Trap passivation and suppressed electrochemical dynamics in perovskite solar cells with C60 interlayers",

abstract = "In this study, we quantify the impact of C60-passivation layers in Cs0.15FA0.85PbI2.75Br0.25 double-cation perovskite solar cells. We apply a combination of impedance spectroscopy, photoluminescence (PL) spectroscopy, and X-ray diffraction (XRD) to identify the origin for the increase in power conversion efficiencies and operational stability for solar cells fabricated with C60/ZnO electron transport layer (ETL) versus reference cells with a ZnO ETL. XRD reveals an increase in PbI2 while PL spectroscopy reveals an increase in Br-rich regions in the perovskite bulk in devices containing C60 interlayers. We apply impedance spectroscopy to quantify the electrochemical dynamics in both solar cell architectures. Solar cells with C60/ZnO ETL demonstrate less pronounced and slower electrochemical dynamics in the impedance spectra than solar cells with ZnO ETL. We conclude that C60 leads to the formation of PbI2-rich and Br-rich domains in the perovskite absorber layer, resulting in reduced recombination losses and improved operational stability.",

keywords = "C, Equivalent circuit model, Impedance spectroscopy, Perovskite, Solar cell, Transport layer, ZnO",

author = "Tulus and Muscarella, {Loreta A.} and Yulia Galagan and Boehme, {Simon Christian} and {von Hauff}, Elizabeth",

note = "Funding Information: The Authors thank Damian Glowienka, Isabelli Fabiano, Andreas Peukert and Nadine Tchamba Yimga for assistance with the experiments. Tulus acknowledges the National Research and Innovation Agency (BRIN), the Republic of Indonesia for the scholarship Program for Research and Innovation in Science and Technology (RISET-Pro) World Bank Loan No. 8245-ID . Tulus, Elizabeth von Hauff and Yulia Galagan acknowledge the COST Action Stable Next Generation Photovoltaics (Grant No. MP1307 ) for support. Yulia Galagan acknowledges the Ministry of Science and Technology of Taiwan (MOST) for supporting the project 110-2222-E-002-001-MY . Simon C. Boehme acknowledges The Netherlands Organization of Scientific Research (NWO) for financial support through the Innovational Research Incentives (Veni) Scheme (Grant No. 722.017.011 ). Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

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AU - Tulus,

AU - Muscarella, Loreta A.

AU - Galagan, Yulia

AU - Boehme, Simon Christian

AU - von Hauff, Elizabeth

N1 - Funding Information: The Authors thank Damian Glowienka, Isabelli Fabiano, Andreas Peukert and Nadine Tchamba Yimga for assistance with the experiments. Tulus acknowledges the National Research and Innovation Agency (BRIN), the Republic of Indonesia for the scholarship Program for Research and Innovation in Science and Technology (RISET-Pro) World Bank Loan No. 8245-ID . Tulus, Elizabeth von Hauff and Yulia Galagan acknowledge the COST Action Stable Next Generation Photovoltaics (Grant No. MP1307 ) for support. Yulia Galagan acknowledges the Ministry of Science and Technology of Taiwan (MOST) for supporting the project 110-2222-E-002-001-MY . Simon C. Boehme acknowledges The Netherlands Organization of Scientific Research (NWO) for financial support through the Innovational Research Incentives (Veni) Scheme (Grant No. 722.017.011 ). Publisher Copyright: © 2022 Elsevier Ltd

PY - 2022/11/20

Y1 - 2022/11/20

N2 - In this study, we quantify the impact of C60-passivation layers in Cs0.15FA0.85PbI2.75Br0.25 double-cation perovskite solar cells. We apply a combination of impedance spectroscopy, photoluminescence (PL) spectroscopy, and X-ray diffraction (XRD) to identify the origin for the increase in power conversion efficiencies and operational stability for solar cells fabricated with C60/ZnO electron transport layer (ETL) versus reference cells with a ZnO ETL. XRD reveals an increase in PbI2 while PL spectroscopy reveals an increase in Br-rich regions in the perovskite bulk in devices containing C60 interlayers. We apply impedance spectroscopy to quantify the electrochemical dynamics in both solar cell architectures. Solar cells with C60/ZnO ETL demonstrate less pronounced and slower electrochemical dynamics in the impedance spectra than solar cells with ZnO ETL. We conclude that C60 leads to the formation of PbI2-rich and Br-rich domains in the perovskite absorber layer, resulting in reduced recombination losses and improved operational stability.

AB - In this study, we quantify the impact of C60-passivation layers in Cs0.15FA0.85PbI2.75Br0.25 double-cation perovskite solar cells. We apply a combination of impedance spectroscopy, photoluminescence (PL) spectroscopy, and X-ray diffraction (XRD) to identify the origin for the increase in power conversion efficiencies and operational stability for solar cells fabricated with C60/ZnO electron transport layer (ETL) versus reference cells with a ZnO ETL. XRD reveals an increase in PbI2 while PL spectroscopy reveals an increase in Br-rich regions in the perovskite bulk in devices containing C60 interlayers. We apply impedance spectroscopy to quantify the electrochemical dynamics in both solar cell architectures. Solar cells with C60/ZnO ETL demonstrate less pronounced and slower electrochemical dynamics in the impedance spectra than solar cells with ZnO ETL. We conclude that C60 leads to the formation of PbI2-rich and Br-rich domains in the perovskite absorber layer, resulting in reduced recombination losses and improved operational stability.

KW - C

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KW - Impedance spectroscopy

KW - Perovskite

KW - Solar cell

KW - Transport layer

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