Multicomponent Approach for Stable Methylammonium-Free Tin–Lead Perovskite Solar Cells

Turren-Cruz, Silver-Hamill; Pascual, Jorge; Hu, Shuaifeng; Sanchez-Diaz, Jesus; Galve-Lahoz, Sergio; Liu, Wentao; Hempel, Wolfram; Chirvony, Vladimir S.; Martinez-Pastor, Juan P.; Boix, Pablo P.; Wakamiya, Atsushi; Mora-Seró, Iván

doi:10.1021/acsenergylett.3c02426

Cited by 5 publications

(1 citation statement)

References 54 publications

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“…For example, decreasing the MA + cation down to 10% will imply changing the fabrication process with the addition of a crystallization modulator to maintain/improve the film quality . In the MA-free system, ,,, the PCE of the cells is generally lower than the films containing MA + cation. ,, Interestingly, the addition of Rb + cation in the MA-free mixed Sn−Pb perovskite films seems to effectively increase the film quality in terms of defect density and carrier lifetime. , The origin behind this is, however, yet to be fully understood, for example, from the view of solution chemistry, since increasing the content of the inorganics most likely varies the colloidal properties of the precursor solution. We believe that the MA-free mixed Sn−Pb PSCs will ultimately outperform the MA-containing counterparts, while more understanding of the crystallization and the solution chemistry is required.…”

Section: All-perovskite Tandemsmentioning

confidence: 99%

Narrow Bandgap Metal Halide Perovskites for All-Perovskite Tandem Photovoltaics

Hu,

Thiesbrummel,

Pascual

et al. 2024

Chem. Rev.

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All-perovskite tandem solar cells are attracting considerable interest in photovoltaics research, owing to their potential to surpass the theoretical efficiency limit of single-junction cells, in a cost-effective sustainable manner. Thanks to the bandgap-bowing effect, mixed tin−lead (Sn−Pb) perovskites possess a close to ideal narrow bandgap for constructing tandem cells, matched with wide-bandgap neat lead-based counterparts. The performance of all-perovskite tandems, however, has yet to reach its efficiency potential. One of the main obstacles that need to be overcome is theoftentimeslow quality of the mixed Sn−Pb perovskite films, largely caused by the facile oxidation of Sn(II) to Sn(IV), as well as the difficult-to-control film crystallization dynamics. Additional detrimental imperfections are introduced in the perovskite thin film, particularly at its vulnerable surfaces, including the top and bottom interfaces as well as the grain boundaries. Due to these issues, the resultant device performance is distinctly far lower than their theoretically achievable maximum efficiency. Robust modifications and improvements to the surfaces of mixed Sn−Pb perovskite films are therefore critical for the advancement of the field. This Review describes the origins of imperfections in thin films and covers efforts made so far toward reaching a better understanding of mixed Sn−Pb perovskites, in particular with respect to surface modifications that improved the efficiency and stability of the narrow bandgap solar cells. In addition, we also outline the important issues of integrating the narrow bandgap subcells for achieving reliable and efficient all-perovskite double-and multi-junction tandems. Future work should focus on the characterization and visualization of the specific surface defects, as well as tracking their evolution under different external stimuli, guiding in turn the processing for efficient and stable single-junction and tandem solar cell devices.

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Section: All-perovskite Tandemsmentioning

confidence: 99%

Narrow Bandgap Metal Halide Perovskites for All-Perovskite Tandem Photovoltaics

Hu,

Thiesbrummel,

Pascual

et al. 2024

Chem. Rev.

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Significance of Formamidinium Incorporation in Perovskite Composition and Its Impact on Solar Cell Efficiency: A Mini‐Review

Sekar,

Manisekaran,

Nwakanma

et al. 2024

Adv Energy and Sustain Res

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Perovskite solar cells (PSCs) have gained tremendous research interest recently owing to several advantages, including low material cost, facile solution processability, bandgap tunability, and alluring device efficiency. The organic formamidinium (FA) cation‐based perovskites are mainly considered as one of the potential candidates for charge carrier generation due to their excellent properties, such as bandgap and thermal stability than traditional perovskites. However, the inevitable unfavorable polymorphism (i.e., α to δ) at room temperature still forms the basis for numerous research works to allow the fabrication of a high‐quality absorber and enhances the PSCs performance. The studies to resolve the polymorphism and several contemporary techniques (e.g., passivation strategy) with several recent novel fabrication methods presented in this review form the essence of the improvements in PSCs. The absorber morphology also influences the charge‐transfer behavior and the device's lifetime. Therefore, understanding these properties is essential to improve the absorber quality and avoid many defects. This review focuses on the structure and properties of pure and mixed FA perovskites with various halides, mainly the FA cation's role in the absorber composition. And a comprehensive overview of recent FA cation‐based double, triple, and quadrupole PSCs results with proper scientific explanations to understand the device physics.

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Consequences of the Pb−S Bond Formation for Lead Halide Perovskites

Wierzbowska,

Wojtkowiak,

Mikłas

et al. 2024

Chemistry A European J

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Lead halide perovskites are structurally not stable due to their ionic bonds. Using sulfur agents in the crystal growth improves the stability and performance of the photovoltaic and light‐emitting devices. In this theoretical work, we use a small toy S‐radical in place of A cation in the bulk of lead iodide perovskite, and highlight the significance of the Pb‐S covalent‐double‐bond formation for: the charge redistribution on the neighboring bonds that also turn to be covalent, phase transformation to a stable non‐perovskite structure, and superior optoelectronic properties. The chemical analysis was performed with the Quantum Theory of Atoms In Molecules (QTAIM) and Non‐Covalent Interactions (NCI) index. Excitonic properties were obtained from the solution of ab initio Bethe‐Salpeter equation. Presence of the spin‐orbit coupling triggers an interplay between the Frenkel and charge‐transfer multiexcitons, switching between the photovoltaic and laser applications. Multiexcitons obey the exciton‐fission preconditions.

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Multicomponent Approach for Stable Methylammonium-Free Tin–Lead Perovskite Solar Cells

Cited by 5 publications

References 54 publications

Narrow Bandgap Metal Halide Perovskites for All-Perovskite Tandem Photovoltaics

Narrow Bandgap Metal Halide Perovskites for All-Perovskite Tandem Photovoltaics

Significance of Formamidinium Incorporation in Perovskite Composition and Its Impact on Solar Cell Efficiency: A Mini‐Review

Consequences of the Pb−S Bond Formation for Lead Halide Perovskites

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