An efficient approach for controlling the crystallization, strain, and defects of the perovskite film in hybrid perovskite solar cells through antisolvent engineering

Tzoganakis, Nikolaos; Chatzimanolis, Konstantinos; Spiliarotis, Emmanuel; Veisakis, George; Tsikritzis, Dimitris; Kymakis, Emmanuel

doi:10.1039/d3se00435j

Cited by 4 publications

(3 citation statements)

References 90 publications

(104 reference statements)

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“…Previous computational studies have reported that such compressive strain can enhance the coupling between Sn-p (or Pb-p) and I-s orbitals, thereby elevating the valence band maximum in energy and shifting trap states into the bands. Consequently, the bandgap may decrease, and the trap states could be eliminated. , This compressive strain may result from the volume change and the pace of film formation during the application of the blended antisolvent. − Furthermore, we analyzed the full width at half-maximum (FWHM) of the (110) peak, as shown in Figure b. A narrower FWHM signifies superior crystallinity, i.e., fewer defects and less strains within the crystal lattice.…”

Section: Resultsmentioning

confidence: 99%

Enhancing Photovoltaic Performance through Optimized Antisolvent Strategy for Low-Bandgap Pb–Sn Perovskites

Yolthida,

Long,

Jang

et al. 2023

ACS Appl. Energy Mater.

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Section: Resultsmentioning

confidence: 99%

Enhancing Photovoltaic Performance through Optimized Antisolvent Strategy for Low-Bandgap Pb–Sn Perovskites

Yolthida,

Long,

Jang

et al. 2023

ACS Appl. Energy Mater.

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“…This suggests that the solvents frequently employed to prepare perovskite solutions, particularly DMF, could potentially have detrimental impacts on people's health. Furthermore, by rapidly eliminating the host solvent, antisolvents are frequently utilized to promote the nucleation and crystallization of perovskite films [23,24]. However, the antisolvents that are widely utilized are extremely volatile and hazardous.…”

Section: Introductionmentioning

confidence: 99%

Fabricating Planar Perovskite Solar Cells through a Greener Approach

Sajid,

Alzahmi,

Tabet

et al. 2024

Nanomaterials

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High-quality perovskite thin films are typically produced via solvent engineering, which results in efficient perovskite solar cells (PSCs). Nevertheless, the use of hazardous solvents like precursor solvents (N-Methyl-2-pyrrolidone (NMP), dimethyl sulfoxide (DMSO), dimethylformamide (DMF), gamma-butyrolactone (GBL)) and antisolvents (chlorobenzene (CB), dibutyl ether (DEE), diethyl ether (Et2O), etc.) is crucial to the preparation of perovskite solutions and the control of perovskite thin film crystallization. The consumption of hazardous solvents poses an imminent threat to both the health of manufacturers and the environment. Consequently, before PSCs are commercialized, the current concerns about the toxicity of solvents must be addressed. In this study, we fabricated highly efficient planar PSCs using a novel, environmentally friendly method. Initially, we employed a greener solvent engineering approach that substituted the hazardous precursor solvents with an environmentally friendly solvent called triethyl phosphate (TEP). In the following stage, we fabricated perovskite thin films without the use of an antisolvent by employing a two-step procedure. Of all the greener techniques used to fabricate PSCs, the FTO/SnO2/MAFAPbI3/spiro-OMeTAD planar device configuration yielded the highest PCE of 20.98%. Therefore, this work addresses the toxicity of the solvents used in the perovskite film fabrication procedure and provides a promising universal method for producing PSCs with high efficiency. The aforementioned environmentally friendly approach might allow for PSC fabrication on an industrial scale in the future under sustainable conditions.

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“…Previous work has shown that morphological changes in perovskite thin films will change water-based degradation. − We acknowledge that the film formation kinetics and resulting morphology will be altered with the use of an antisolvent bath. To keep the film formation kinetics reasonably similar to the control, the initial tension in the perovskite film was manipulated by using a substrate with a different CTE while using a film formation method identical to that used with glass (Figure A).…”

mentioning

confidence: 99%

Moisture Uptake Relaxes Stress in Metal Halide Perovskites at the Expense of Stability

McAndrews,

Guo,

Kaczaral

et al. 2024

ACS Energy Lett.

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Previous studies have shown that the degradation rate of metal halide perovskites in an ambient atmosphere increases with the amount of tensile stress, which primarily arises from the coefficient of thermal expansion mismatch with the substrate. In this work, we show the first evidence of tensile stress relaxation in perovskite films resulting from moisture uptake. Indeed, for multiple perovskite compositions we observe that tension relaxes rapidly in ambient conditions, as compared to inert conditions, with quartz crystal microbalance measurements showing a mass density increase on a similar time scale indicative of moisture uptake. The uptake of moisture at free surfaces, including grain boundaries, can reduce tension in a constrained film, similar to how adatom diffusion reduces residual stress following thin film formation. Unfortunately, the uptake of moisture can catalyze other degradation mechanisms such as PbI 2 formation or a transition to a nonperovskite structural phase. Stress-induced uptake of moisture is an especially important problem for all-inorganic perovskites because they are annealed at much higher temperatures, causing high tensile stress. It explains the unusually poor ambient stability of these perovskites. Using a diethyl ether antisolvent bath to attach CsPbI 2 Br to the substrate at a much lower temperature, we reduced the initial tensile strain from 0.43 ± 0.04% to 0.12 ± 0.05%, thus reducing the driving force for moisture uptake and improving its ambient phase stability by over a factor of 15.

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An efficient approach for controlling the crystallization, strain, and defects of the perovskite film in hybrid perovskite solar cells through antisolvent engineering

Abstract: Antisolvent engineering with the octylammonium salt OABr improves the quality of the perovskite film and suppresses nonradiative losses by 43.6%, resulting in high performance and stable inverted perovskite solar cells.

Cited by 4 publications

References 90 publications

Enhancing Photovoltaic Performance through Optimized Antisolvent Strategy for Low-Bandgap Pb–Sn Perovskites

Enhancing Photovoltaic Performance through Optimized Antisolvent Strategy for Low-Bandgap Pb–Sn Perovskites

Fabricating Planar Perovskite Solar Cells through a Greener Approach

Moisture Uptake Relaxes Stress in Metal Halide Perovskites at the Expense of Stability

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