Methylammonium Triiodide for Defect Engineering of High-Efficiency Perovskite Solar Cells

Essa A. Alharbi; Anurag Krishna; Thomas P. Baumeler; Mathias Dankl; George C. Fish; Felix Eickemeyer; Olivier Ouellette; Paramvir Ahlawat; Viktor Škorjanc; Elsa John; Bowen Yang; Lukas Pfeifer; Claudia Esther Avalos; Linfeng Pan; Mounir Mensi; Pascal Alexander Schouwink; Jacques E. Moser; Anders Hagfeldt; Ursula Rothlisberger; Shaik M. Zakeeruddin; Michael Grätzel

doi:10.1021/acsenergylett.1c01754

Methylammonium Triiodide for Defect Engineering of High-Efficiency Perovskite Solar Cells

Essa A. Alharbi, Anurag Krishna, Thomas P. Baumeler, Mathias Dankl, George C. Fish, Felix Eickemeyer, Olivier Ouellette, Paramvir Ahlawat, Viktor Škorjanc, Elsa John, Bowen Yang, Lukas Pfeifer, Claudia Esther Avalos, Linfeng Pan, Mounir Mensi, Pascal Alexander Schouwink, Jacques E. Moser, Anders Hagfeldt, Ursula Rothlisberger, Shaik M. ZakeeruddinMichael Grätzel

Chemistry

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

Abstract

The defects present in metal halide perovskite are deleterious to both the performance and stability of photovoltaic devices. Consequently, there is an intense focus on developing defect mitigation strategies. Herein we report a facile strategy that employs methylammonium triiodide (MAI3) as an additive to the perovskite precursor solution. We examine the effect of MAI3 on the structural and optoelectronic properties by X-ray diffraction, density functional theory calculations, molecular dynamics simulations, solid-state nuclear magnetic resonance, steady-state, time-resolved photoluminescence (TRPL), and time-resolved terahertz spectroscopy (TRTS). Specifically, TRPL and TRTS show that MAI3 suppresses nonradiative recombination and increases the charge carrier mobility. As a result, the champion device shows a power conversion efficiency (PCE) of 23.46% with a high fill factor of >80%. Furthermore, these devices exhibit enhanced operational stability, with the best device retaining ∼90% of its initial PCE under 1 sun illumination with maximum power point tracking for 350 h.

Original language	English (US)
Pages (from-to)	3650-3660
Number of pages	11
Journal	ACS Energy Letters
Volume	6
Issue number	10
DOIs	https://doi.org/10.1021/acsenergylett.1c01754
State	Published - Oct 8 2021

ASJC Scopus subject areas

Chemistry (miscellaneous)
Renewable Energy, Sustainability and the Environment
Fuel Technology
Energy Engineering and Power Technology
Materials Chemistry

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Alharbi, E. A., Krishna, A., Baumeler, T. P., Dankl, M., Fish, G. C., Eickemeyer, F., Ouellette, O., Ahlawat, P., Škorjanc, V., John, E., Yang, B., Pfeifer, L., Avalos, C. E., Pan, L., Mensi, M., Schouwink, P. A., Moser, J. E., Hagfeldt, A., Rothlisberger, U., ... Grätzel, M. (2021). Methylammonium Triiodide for Defect Engineering of High-Efficiency Perovskite Solar Cells. ACS Energy Letters, 6(10), 3650-3660. https://doi.org/10.1021/acsenergylett.1c01754

Alharbi, EA, Krishna, A, Baumeler, TP, Dankl, M, Fish, GC, Eickemeyer, F, Ouellette, O, Ahlawat, P, Škorjanc, V, John, E, Yang, B, Pfeifer, L, Avalos, CE, Pan, L, Mensi, M, Schouwink, PA, Moser, JE, Hagfeldt, A, Rothlisberger, U, Zakeeruddin, SM & Grätzel, M 2021, 'Methylammonium Triiodide for Defect Engineering of High-Efficiency Perovskite Solar Cells', ACS Energy Letters, vol. 6, no. 10, pp. 3650-3660. https://doi.org/10.1021/acsenergylett.1c01754

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abstract = "The defects present in metal halide perovskite are deleterious to both the performance and stability of photovoltaic devices. Consequently, there is an intense focus on developing defect mitigation strategies. Herein we report a facile strategy that employs methylammonium triiodide (MAI3) as an additive to the perovskite precursor solution. We examine the effect of MAI3 on the structural and optoelectronic properties by X-ray diffraction, density functional theory calculations, molecular dynamics simulations, solid-state nuclear magnetic resonance, steady-state, time-resolved photoluminescence (TRPL), and time-resolved terahertz spectroscopy (TRTS). Specifically, TRPL and TRTS show that MAI3 suppresses nonradiative recombination and increases the charge carrier mobility. As a result, the champion device shows a power conversion efficiency (PCE) of 23.46% with a high fill factor of >80%. Furthermore, these devices exhibit enhanced operational stability, with the best device retaining ∼90% of its initial PCE under 1 sun illumination with maximum power point tracking for 350 h.",

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AU - Alharbi, Essa A.

AU - Krishna, Anurag

AU - Baumeler, Thomas P.

AU - Dankl, Mathias

AU - Fish, George C.

AU - Eickemeyer, Felix

AU - Ouellette, Olivier

AU - Ahlawat, Paramvir

AU - Škorjanc, Viktor

AU - John, Elsa

AU - Yang, Bowen

AU - Pfeifer, Lukas

AU - Avalos, Claudia Esther

AU - Pan, Linfeng

AU - Mensi, Mounir

AU - Schouwink, Pascal Alexander

AU - Moser, Jacques E.

AU - Hagfeldt, Anders

AU - Rothlisberger, Ursula

AU - Zakeeruddin, Shaik M.

AU - Grätzel, Michael

PY - 2021/10/8

Y1 - 2021/10/8

N2 - The defects present in metal halide perovskite are deleterious to both the performance and stability of photovoltaic devices. Consequently, there is an intense focus on developing defect mitigation strategies. Herein we report a facile strategy that employs methylammonium triiodide (MAI3) as an additive to the perovskite precursor solution. We examine the effect of MAI3 on the structural and optoelectronic properties by X-ray diffraction, density functional theory calculations, molecular dynamics simulations, solid-state nuclear magnetic resonance, steady-state, time-resolved photoluminescence (TRPL), and time-resolved terahertz spectroscopy (TRTS). Specifically, TRPL and TRTS show that MAI3 suppresses nonradiative recombination and increases the charge carrier mobility. As a result, the champion device shows a power conversion efficiency (PCE) of 23.46% with a high fill factor of >80%. Furthermore, these devices exhibit enhanced operational stability, with the best device retaining ∼90% of its initial PCE under 1 sun illumination with maximum power point tracking for 350 h.

AB - The defects present in metal halide perovskite are deleterious to both the performance and stability of photovoltaic devices. Consequently, there is an intense focus on developing defect mitigation strategies. Herein we report a facile strategy that employs methylammonium triiodide (MAI3) as an additive to the perovskite precursor solution. We examine the effect of MAI3 on the structural and optoelectronic properties by X-ray diffraction, density functional theory calculations, molecular dynamics simulations, solid-state nuclear magnetic resonance, steady-state, time-resolved photoluminescence (TRPL), and time-resolved terahertz spectroscopy (TRTS). Specifically, TRPL and TRTS show that MAI3 suppresses nonradiative recombination and increases the charge carrier mobility. As a result, the champion device shows a power conversion efficiency (PCE) of 23.46% with a high fill factor of >80%. Furthermore, these devices exhibit enhanced operational stability, with the best device retaining ∼90% of its initial PCE under 1 sun illumination with maximum power point tracking for 350 h.

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Methylammonium Triiodide for Defect Engineering of High-Efficiency Perovskite Solar Cells

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