Stress-induced stabilization of the photoactive FAPbI<sub>3</sub> phase under ambient conditions without using an additive approach

Porwal, Shivam; Bansal, Nitin Kumar; Ghosh, Subrata; Singh, Trilok

doi:10.1039/d4ya00092g

Energy Adv.

2024

DOI: 10.1039/d4ya00092g

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Stress-induced stabilization of the photoactive FAPbI₃ phase under ambient conditions without using an additive approach

Shivam Porwal,

Nitin Kumar Bansal,

Subrata Ghosh

et al.

Abstract: Formamidinium lead iodide (FAPbI3) as the absorber material has garnered significant interest due to its suitable bandgap for perovskite solar cell applications. Herein, a novel fabrication process is developed to...

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2024

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Cited by 3 publications

References 53 publications

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Effect of Interfacial Ionic Defects in Perovskite Solar Cells and their Mitigation Mechanism: A Comprehensive Theoretical Analysis with Experimental Validation

Porwal,

Bansal,

Dey

et al. 2024

Advcd Theory and Sims

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Interfacial ionic defects in perovskite solar cells (PSCs) significantly influence the efficiency and long‐term stability. In this study, primarily simulation‐assisted analyses are conducted to explore the capacitive effect of these defects on the performance of PSCs through impedance analysis. Simulated data indicate a decrease in capacitance with increasing frequency, leading to a higher built‐in potential (ΔVbi = 150 mV). Moreover, an increase in capacitance with increasing light intensity is observed. Additionally, reducing the ionic defect concentration at the interfaces (from 1019 to 1016 cm−3) results in more significant band bending and a higher Vbi. Potential solutions to mitigate interfacial ionic defects, including doping at transport layer interfaces are proposed. Doping at both interfaces introduces an energy spike (valence band offset) of 0.21 eV and a cliff (conduction band offset) of 0.16 eV, respectively, for holes and electrons, leading to an improvement in the open circuit voltage (VOC). Finally, experimental results demonstrate a notable enhancement in VOC of 0.04 V with the introduction of Li+ doping at the electron transport layer/perovskite interface. These findings provide essential perceptions for effectively mitigating the effect of interfacial ionic defects on the performance of PSCs and enhance their overall performance.

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Effect of Interfacial Ionic Defects in Perovskite Solar Cells and their Mitigation Mechanism: A Comprehensive Theoretical Analysis with Experimental Validation

Porwal,

Bansal,

Dey

et al. 2024

Advcd Theory and Sims

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Why Perovskite Thermal Stress is Unaffected by Thin Contact Layers

McAndrews,

Ahmad,

Guo

et al. 2024

Advanced Energy Materials

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Metal halide perovskite photovoltaics have emerged as a high efficiency, low‐cost alternative that can potentially rival or enhance conventional silicon technology. Despite exceptional initial power conversion efficiencies, achieving compliance with international standards and widespread adoption requires further enhancements to their operational stability. Notably, addressing mechanical strain and stress in brittle perovskites has emerged as a pivotal approach to mitigate chemical degradation and improve reliability during thermal cycling. In this study, a popularized strain engineering strategy is investigated in which a high coefficient of thermal expansion (CTE) hole transport layer (i.e., PDCBT) is cast onto inorganic perovskite (CsPbI2Br) at 100 °C. Contrary to previously published results, the X‐ray diffraction (XRD):Sin2ψ and substrate curvature measurement techniques show that the hole transport layer has no discernible impact on perovskite strain. The accuracy of the XRD:Sin2ψ method for measuring strain is highlighted in contrast to an analysis based on shifts of single XRD peaks which can be influenced by multiple artifacts. The findings in this study are in accordance with mechanics theory: thin layers are unable to induce significant strain changes in perovskite thin films as the force they apply is negligible compared to that applied by a thick and stiff substrate.

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Enhancing the efficiency and stability of inverted perovskite solar cells by using 6-(trifluoromethyl)nicotinic acid as a potent defect passivator

Yadav,

Das Adhikari,

Baishya

et al. 2024

J. Mater. Chem. C

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Stress-induced stabilization of the photoactive FAPbI₃ phase under ambient conditions without using an additive approach

Abstract: Formamidinium lead iodide (FAPbI3) as the absorber material has garnered significant interest due to its suitable bandgap for perovskite solar cell applications. Herein, a novel fabrication process is developed to...

Cited by 3 publications

References 53 publications

Effect of Interfacial Ionic Defects in Perovskite Solar Cells and their Mitigation Mechanism: A Comprehensive Theoretical Analysis with Experimental Validation

Effect of Interfacial Ionic Defects in Perovskite Solar Cells and their Mitigation Mechanism: A Comprehensive Theoretical Analysis with Experimental Validation

Why Perovskite Thermal Stress is Unaffected by Thin Contact Layers

Enhancing the efficiency and stability of inverted perovskite solar cells by using 6-(trifluoromethyl)nicotinic acid as a potent defect passivator

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Stress-induced stabilization of the photoactive FAPbI3 phase under ambient conditions without using an additive approach

Abstract: Formamidinium lead iodide (FAPbI3) as the absorber material has garnered significant interest due to its suitable bandgap for perovskite solar cell applications. Herein, a novel fabrication process is developed to...

Cited by 3 publications

References 53 publications

Effect of Interfacial Ionic Defects in Perovskite Solar Cells and their Mitigation Mechanism: A Comprehensive Theoretical Analysis with Experimental Validation

Effect of Interfacial Ionic Defects in Perovskite Solar Cells and their Mitigation Mechanism: A Comprehensive Theoretical Analysis with Experimental Validation

Why Perovskite Thermal Stress is Unaffected by Thin Contact Layers

Enhancing the efficiency and stability of inverted perovskite solar cells by using 6-(trifluoromethyl)nicotinic acid as a potent defect passivator

Contact Info

Product

Resources

About

Stress-induced stabilization of the photoactive FAPbI₃ phase under ambient conditions without using an additive approach