Hard x-ray photoemission spectroscopy of Bi2S3 thin films

Haaf, Sebastian ten; Balke, Benjamin; Felser, Claudia; Jakob, G.

doi:10.1063/1.4748299

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…By plotting (α h ν) 2 versus h ν we extrapolated the linear fitting line with the x -axis and obtained an optical edge of 1.59 eV (Figure a). This value is in good agreement with the reported 1.60 eV for a-Bi 2 S 3 film . As shown in the UPS spectra (Figure b), the Fermi level of a-Bi 2 S 3 , 4.45 eV, was established by subtracting the cutoff value from the excitation source of 21.2 eV.…”

Section: Resultssupporting

confidence: 90%

“…This value is in good agreement with the reported 1.60 eV for a-Bi 2 S 3 film. 34 As shown in the UPS spectra (Figure 2b), the Fermi level of a-Bi 2 S 3 , 4.45 eV, was established by subtracting the cutoff value from the excitation source of 21.2 eV. Here, we would like to discuss the potential effect of a trace amount of metallic Bi in a-Bi 2 S 3 as observed by XPS measurement.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Low-Temperature-Processed Amorphous Bi₂S₃ Film as an Inorganic Electron Transport Layer for Perovskite Solar Cells

Xie

et al. 2016

ACS Photonics

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Organic−inorganic hybrid perovskite solar cells have attracted great attention due to their unique properties and rapid increased power conversion efficiency. Currently, PC 61 BM is widely used as the electron transport layer (ETL) for inverted hybrid perovksite solar cells. Here we propose and demonstrate that Bi 2 S 3 , a ribboned compound with intrinsic high mobility and stability, could be used as the ETL for perovksite solar cells. Through a simple thermal evaporation with the substrate kept at room temperature, we successfully produced a compact and smooth amorphous Bi 2 S 3 ETL with high conductivity. Our NiO/ CH 3 NH 3 PbI 3 /Bi 2 S 3 solar cell achieved a device efficiency of 13%, which is comparable with our counterpart device using PC 61 BM as the ETL. Moreover, our device showed much improved ambient storage stability due to the hydrophobic and hermetic encapsulation of the perovskite layer by the Bi 2 S 3 ETL. We believe thermally evaporated Bi 2 S 3 is a promising ETL for inverted hybrid perovskite solar cells and worthy of further exploration.

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Section: Resultssupporting

confidence: 90%

Section: ■ Results and Discussionmentioning

confidence: 99%

Low-Temperature-Processed Amorphous Bi₂S₃ Film as an Inorganic Electron Transport Layer for Perovskite Solar Cells

Xie

et al. 2016

ACS Photonics

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“…The binding energies for the spin-orbit splitting of the two characteristic Bi 4f 5/2 and Bi 4f 7/2 peaks are observed at 162.3 and 157 eV respectively (Figure 6-b), which present a good agreement with other results reported in the literature. [34][35][36][37][38][39] The binding energy corresponding to the characteristic Bi 5d peak of metallic bismuth is also observed at 26 eV, which coincides with the reported literature value. [27] The binding energy recorded at 531 eV corresponds to the characteristic peak of O1s, indicating the existence of oxide species on the surface of Bi-NPs.…”

Section: Xps and Ftir Analysissupporting

confidence: 89%

Synthesis and Characterization of Mesoporous Bismuth Nanopowders as a Stabilizer of 2‐Aminophenol under Ultraviolet Light

Kellou,

Boudinar,

Souici

et al. 2024

ChemistrySelect

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In this paper, a mesoporous bismuth nanopowders (Bi‐NPWs) were synthesized by chemical method and used as photosbilizer agent. The formation and stability of Bi in the solution was monitored by UV‐Vis analysis, the results shows a strong plasmonic band near 270 nm, which confirms the reduction of bismuth ions to Bi0 in the aqueous phase.Also, after the precipitating process, the optical properties of Bi‐NPWs were measured with UV‐Vis spectroscopy, which showed an absorption peak around 290 and 470 nm, characteristic of the plasmonic response of Bi nanoparticles (Bi‐NPs). X‐ray diffraction (XRD) analysis have revealed a rhombohedral polycrystalline structure with a preferential orientation along the (012) plane for the Bi‐NPs. The surface states of the Bi‐NPs were evidenced by X‐ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR).The plasmonic properties the Bi‐NPWs was evaluated and exploited to photo‐stabilization of 2‐Aminophenol (2AP) in aqueous solutions under UV irradiation (365 nm). It was found that the Bi‐NPWs exhibited a remarkablephoto‐stabilization performance depending on the active surface.In the absence of Bi‐NPWs, a significant variation which increases to about (0.42 %) after 9 h of UV irradiation was noticed, with the presence of 6 and 45 Bi‐NPs the relative variation decreases to about (0.12 %) and to about 0.2 % respectively.

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“…Optical transmission measurements were evaluated also for thickness determination and resulted in consistent values. A full description of the preparation process and the structural and electrical properties of similar films can be found in separate publications .…”

Section: Methodsmentioning

confidence: 99%

Detailed photoluminescence study of vapor deposited films of different surface morphology

Sträter

Haaf

Brüggemann

et al. 2014

Physica Status Solidi (b)

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authorenWe present a temperature‐ and intensity‐dependent photoluminescence (PL) study of the binary semiconductor Bi2S3 on the mm‐scale and a laterally resolved PL measurement with a resolution of x≈900nm. The films can show a rather rough surface with needles and flakes of Bi2S3 with different orientations as well as very flat and smooth surface morphology. Despite a band gap of Eg≈1.3eV the films show a splitting of quasi‐Fermi levels (QFL) of μ≈700meV at room temperature. By means of temperature‐dependent PL we have located several radiative and non‐radiative defect states in the band gap. For a better understanding of this thin film semiconductor a full analysis of the laterally resolved PL measurement including the integrated PL yield, energetic position of the PL maximum, optical band gap, splitting of quasi‐Fermi levels and defect absorption of both sample morphologies is presented to avoid misinterpretation of experimental data.

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Hard x-ray photoemission spectroscopy of Bi2S3 thin films

Cited by 8 publications

References 17 publications

Low-Temperature-Processed Amorphous Bi₂S₃ Film as an Inorganic Electron Transport Layer for Perovskite Solar Cells

Low-Temperature-Processed Amorphous Bi₂S₃ Film as an Inorganic Electron Transport Layer for Perovskite Solar Cells

Synthesis and Characterization of Mesoporous Bismuth Nanopowders as a Stabilizer of 2‐Aminophenol under Ultraviolet Light

Detailed photoluminescence study of vapor deposited films of different surface morphology

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Hard x-ray photoemission spectroscopy of Bi2S3 thin films

Cited by 8 publications

References 17 publications

Low-Temperature-Processed Amorphous Bi2S3 Film as an Inorganic Electron Transport Layer for Perovskite Solar Cells

Low-Temperature-Processed Amorphous Bi2S3 Film as an Inorganic Electron Transport Layer for Perovskite Solar Cells

Synthesis and Characterization of Mesoporous Bismuth Nanopowders as a Stabilizer of 2‐Aminophenol under Ultraviolet Light

Detailed photoluminescence study of vapor deposited films of different surface morphology

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Low-Temperature-Processed Amorphous Bi₂S₃ Film as an Inorganic Electron Transport Layer for Perovskite Solar Cells

Low-Temperature-Processed Amorphous Bi₂S₃ Film as an Inorganic Electron Transport Layer for Perovskite Solar Cells