Structural, stoichiometric and optical constants of crystalline undoped lead iodide films prepared by the flash-evaporation method

Jafar, Mousa M. Abdul-Gader; Saleh, Mahmoud H.; Al-Daraghmeh, Tariq M.; Ahmad, Mais Jamil A.; AbuEid, Maryam A.; Ershaidat, N.; Bulos, Basim N.

doi:10.1007/s00339-019-2945-6

Cited by 3 publications

(2 citation statements)

References 30 publications

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“…This variation may be associated with a reduction in the film’s electronic density with the reduction of Pb as the rf power increases. The values obtained are in line with those reported for crystals and thin films of PbI 2 deposited by different methods, whose values range from 2.9 to 4.5 for the 600 nm wavelength. − …”

Section: Resultssupporting

confidence: 89%

Lead Iodide Thin Films via rf Sputtering

Filho

Borrero

Viana

et al. 2020

Crystal Growth & Design

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Lead iodide (PbI2) is a precursor for the preparation of the organolead iodide perovskite (CH3NH3PbI3), which has been used in the fabrication of highly efficient solar cells. In this work, a novel route for the deposition of PbI2 thin films is performed by rf sputtering a target made from compressed PbI2 powder. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) revealed that the PbI2 films produced were uniform, pinhole-free, polycrystalline, and had low roughness. A small concentration of Pb nanocrystals observed within the films is attributed to differences in the sputtering yield of lead and iodide from the PbI2 target. A dependence of band gap on rf sputtering power was observed, which was associated with a reduction in the concentration of Pb nanocrystals. The PbI2 films were efficiently converted into CH3NH3PbI3 perovskite films through the immersion into a methylammonium iodide (MAI) solution, which also converted the remaining Pb nanocrystals into perovskite. This methodology has the potential to forge the way toward a new method for the fabrication of large-area perovskite solar cells.

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Section: Resultssupporting

confidence: 89%

Lead Iodide Thin Films via rf Sputtering

Filho

Borrero

Viana

et al. 2020

Crystal Growth & Design

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“…Crystal growth kinetics was monitored in situ by collecting photoluminescence (PL) spectra during solution immersion. PbI 2 and α-FAPbI 3 exhibit PL peaks around 500 nm − and 800 nm, , respectively, and are thus easily distinguishable from one another. Figure a,b displays the PL spectra collected on PbI 2 -infiltrated TiO 2 scaffolds after 1, 60, 90, 300, 600, 900, and 1200 s of immersion in FAI and FAI/BAI solutions, respectively (λ ex = 532 nm).…”

Section: Resultsmentioning

confidence: 99%

Scaffold-Guided Crystallization of Oriented α-FAPbI₃ Nanowire Arrays for Solar Cells

Alaei,

Mohajerani,

Schmelmer

et al. 2023

ACS Appl. Mater. Interfaces

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Perovskite nanowire arrays with large surface areas for efficient charge transfer and continuous highly crystalline domains for efficient charge transport exhibit ideal morphologies for solar-cell active layers. Here, we introduce a room temperature two-step method to grow dense, vertical nanowire arrays of formamidinium lead iodide (FAPbI 3 ). PbI 2 nanocrystals embedded in the cylindrical nanopores of anodized titanium dioxide scaffolds were converted to FAPbI 3 by immersion in a FAI solution for a period of 0.5–30 min. During immersion, FAPbI 3 crystals grew vertically from the scaffold surface as nanowires with diameters and densities determined by the underlying scaffold. The presence of butylammonium cations during nanowire growth stabilized the active α polymorph of FAPbI 3 , precluding the need for a thermal annealing step. Solar cells comprising α-FAPbI 3 nanowire arrays exhibited maximum solar conversion efficiencies of >14%. Short-circuit current densities of 22–23 mA cm –2 were achieved, on par with those recorded for the best-performing FAPbI 3 solar cells reported to date. Such large photocurrents are attributed to the single-crystalline, low-defect nature of the nanowires and increased interfacial area for photogenerated charge transfer compared with thin films.

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Structural and Optical Properties of Two-Step Dip-Coated CH3NH3PbI3 Films Based on Underlying Dip-Coated PbI2 Films

AbuEid

Jafar

Hodali

et al. 2022

J. Electron. Mater.

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Structural, stoichiometric and optical constants of crystalline undoped lead iodide films prepared by the flash-evaporation method

Cited by 3 publications

References 30 publications

Lead Iodide Thin Films via rf Sputtering

Lead Iodide Thin Films via rf Sputtering

Scaffold-Guided Crystallization of Oriented α-FAPbI₃ Nanowire Arrays for Solar Cells

Structural and Optical Properties of Two-Step Dip-Coated CH3NH3PbI3 Films Based on Underlying Dip-Coated PbI2 Films

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Structural, stoichiometric and optical constants of crystalline undoped lead iodide films prepared by the flash-evaporation method

Cited by 3 publications

References 30 publications

Lead Iodide Thin Films via rf Sputtering

Lead Iodide Thin Films via rf Sputtering

Scaffold-Guided Crystallization of Oriented α-FAPbI3 Nanowire Arrays for Solar Cells

Structural and Optical Properties of Two-Step Dip-Coated CH3NH3PbI3 Films Based on Underlying Dip-Coated PbI2 Films

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Product

Resources

About

Scaffold-Guided Crystallization of Oriented α-FAPbI₃ Nanowire Arrays for Solar Cells