Effect of acetic acid concentration on optical properties of lead acetate based methylammonium lead iodide perovskite thin film

Uyanga, Kindness A.; Ezike, Sabastine C.; Onyedika, Amadi T.; Kareem, Abdulazeez B.; Chiroma, Timothy Musa

doi:10.1016/j.optmat.2020.110456

Cited by 18 publications

(2 citation statements)

References 56 publications

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“…Nenon et al used the hard and soft acids and bases concept to develop a general ligand passivation scheme and showed that the tail group of carboxylates can be used to selectively coordinate or dissociate the ligands . Several experimental studies have shown that the radiation recombination between charge traps is suppressed after the passivation, resulting in a blue shift in the PL peak. − ,− Huang et al performed a systematic study on how the amount of ligands (oleylamine and oleic acid), the precursor/ligand ratio, and the reaction temperature affect perovskites . Tong et al showed that the size of the perovskites decreased and the emission spectrum blue-shifted by controlling the degree of dilution .…”

Section: Introductionmentioning

confidence: 99%

Varying the Concentration of Organic Acid and Amine Ligands Allows Tuning between Quantum Dots and Magic-Sized Clusters of CH₃NH₃PbBr₃ Perovskite: Implications for Photonics and Energy Conversion

Liu

Vickers

et al. 2020

ACS Appl. Nano Mater.

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Metal halide perovskites, such as methylammonium lead halide (CH 3 NH 3 PbBr 3 ), have recently attracted tremendous attention due to their outstanding properties and promising applications. Here, CH 3 NH 3 PbBr 3 perovskite magic-sized clusters (PMSCs) and perovskite quantum dots (PQDs) are synthesized by surface passivation with various organic acids and amines through a ligand-assisted reprecipitation process (LARP). Their optical properties are investigated with ultraviolet−visible (UV−vis) absorption and photoluminescence (PL) spectroscopy. The structures and optical properties of the PMSCs and PQDs can be controlled by varying the ligand/precursor ratio and type as well as the concentration of ligands. Specifically, a high ligand/precursor ratio and excessive amines favor PMSCs, whereas excessive acids lead to the generation of PQDs over PMSCs. As a result, we can tune between PQDs and PMSCs by changing the amine/acid ligand ratio. Energy-dispersive X-ray (EDS) elemental mapping confirms the presence of the constituent elements of the perovskite, namely, Pb and Br. With the help of Fourier transform infrared (FTIR) results, a model is proposed to explain the mechanism of formation of both PQDs and PMSCs as well as their interconversion in terms of the ligands passivating the surface defect sites. This study provides important insights into the fundamental growth mechanisms of perovskite nanostructures, especially in terms of the interplay between the perovskite precursors and passivating ligands. The work has significant implications in applications of metal halide perovskites in photonics and energy conversion.

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Section: Introductionmentioning

confidence: 99%

Varying the Concentration of Organic Acid and Amine Ligands Allows Tuning between Quantum Dots and Magic-Sized Clusters of CH₃NH₃PbBr₃ Perovskite: Implications for Photonics and Energy Conversion

Liu

Vickers

et al. 2020

ACS Appl. Nano Mater.

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“…The measured transmittance spectra ( Figure 4 a) of glass/ITO/PEDOT/OIHP films show that the transmittance of light is lowered for films with additives, which correlates to the formation of good crystals. 58 This, in turn, enhances the light-harvesting potential of the photoactive layer, which results in the generation of more charge carriers. Moreover, this phenomenon improves the charge collection efficiency of the OIHPSC.…”

Section: Resultsmentioning

confidence: 99%

3-Thiophenemalonic Acid Additive Enhanced Performance in Perovskite Solar Cells

Abicho,

Hailegnaw,

Mayr

et al. 2024

ACS Omega

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The development of ambient-air-processable organic−inorganic halide perovskite solar cells (OIHPSCs) is a challenge necessary for the transfer of laboratory-scale technology to large-scale and low-cost manufacturing of such devices. Different approaches like additives, antisolvents, composition engineering, and different deposition techniques have been employed to improve the morphology of the perovskite films. Additives that can form Lewis acid−base adducts are known to minimize extrinsic impacts that trigger defects in ambient air. In this work, we used the 3-thiophenemalonic acid (3-TMA) additive, which possesses thiol and carboxyl functional groups, to convert PbI 2 , PbCl 2 , and CH 3 NH 3 I to CH 3 NH 3 PbI 3 completely. This strategy is effective in regulating the kinetics of crystallization and improving the crystallinity of the light-absorbing layer under high relative humidity (RH) conditions (30−50%). As a result, the 3-TMA additive increases the yield of the power conversion efficiency (PCE) from 14.9 to 16.5% and its stability under the maximum power point. Finally, we found that the results of this work are highly relevant and provide additional inputs to the ongoing research progress related to additive engineering as one of the efficient strategies to reduce parasitic recombination and enhance the stability of inverted OIHPSCs in ambient environment processing.

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Influence of annealing on stability and regeneration of degraded CH3NH3PbI3 thin films

Mohanty,

Singh,

Jana

et al. 2024

Appl. Phys. A

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Effect of acetic acid concentration on optical properties of lead acetate based methylammonium lead iodide perovskite thin film

Cited by 18 publications

References 56 publications

Varying the Concentration of Organic Acid and Amine Ligands Allows Tuning between Quantum Dots and Magic-Sized Clusters of CH₃NH₃PbBr₃ Perovskite: Implications for Photonics and Energy Conversion

Varying the Concentration of Organic Acid and Amine Ligands Allows Tuning between Quantum Dots and Magic-Sized Clusters of CH₃NH₃PbBr₃ Perovskite: Implications for Photonics and Energy Conversion

3-Thiophenemalonic Acid Additive Enhanced Performance in Perovskite Solar Cells

Influence of annealing on stability and regeneration of degraded CH3NH3PbI3 thin films

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Effect of acetic acid concentration on optical properties of lead acetate based methylammonium lead iodide perovskite thin film

Cited by 18 publications

References 56 publications

Varying the Concentration of Organic Acid and Amine Ligands Allows Tuning between Quantum Dots and Magic-Sized Clusters of CH3NH3PbBr3 Perovskite: Implications for Photonics and Energy Conversion

Varying the Concentration of Organic Acid and Amine Ligands Allows Tuning between Quantum Dots and Magic-Sized Clusters of CH3NH3PbBr3 Perovskite: Implications for Photonics and Energy Conversion

3-Thiophenemalonic Acid Additive Enhanced Performance in Perovskite Solar Cells

Influence of annealing on stability and regeneration of degraded CH3NH3PbI3 thin films

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Varying the Concentration of Organic Acid and Amine Ligands Allows Tuning between Quantum Dots and Magic-Sized Clusters of CH₃NH₃PbBr₃ Perovskite: Implications for Photonics and Energy Conversion

Varying the Concentration of Organic Acid and Amine Ligands Allows Tuning between Quantum Dots and Magic-Sized Clusters of CH₃NH₃PbBr₃ Perovskite: Implications for Photonics and Energy Conversion