Download scientific diagram | X-ray photoelectron spectroscopy (XPS) of PbSe microcubes: a XPS survey spectrum, b high-resolution XPS spectrum of the Pb (4f), and c high-resolution XPS...

2019年12月1日 · According to the X-ray photoelectron spectroscopy (XPS) studies, thin films oxidation accompanied with the formation of PbSO 3 and PbSO 4 compounds on the (100) facets of PbS QDs. Although MAPbI 3 treatment led to the complete passivation of QDs in the air, perovskite shelling partially oxidized to PbO and PbCO 3 compounds.

2022年4月1日 · PbSe-PbS/PbTe nanocomposite is effective in attaining ZT ∼2 at 800 K. This method dramatically reduces thermal conductivity to less than half of pristine PbSe. In PbSe, two valance bands, i.e., light hole L and heavy hole Σ, have a large separation of ∼ 0.26 eV. Thus, the possible high ZT is limited in PbSe [5], [24], [25].

2022年6月5日 · The XPS study shows that samples with KI appear to have a surface coating of PbI 2 and are consistently less susceptible to oxidation in an inert atmosphere (Table 2). The sample without KI exhibited PbSeO 3 and PbO on the surface as a …

2020年10月9日 · In this study, we make a comprehensive effort to chemically deposit PbSe films with the use of ascorbic acid as an inhibitor of oxidation of selenourea. The goal is to analyze the influence of ascorbic acid on the composition, morphology, and structural and photoelectric properties of lead selenide.

2021年4月27日 · New selenates La 2 O 2 SeO 4 and Pr 2 O 2 SeO 4, as well as selenite PbSe 4+ O 3 and selenate PbSe 6+ O 4, have been studied by X-ray photoelectron spectroscopy (XPS). The elemental and ionic compositions of new selenates containing Se 6+, La 3+, and Pr 3+ ions have been confirmed on the basis of XPS parameters of the core and valence electrons.

The XPS Spectra section provides raw and processed survey spectra, chemical state spectra, BE values, FWHM values, and overlays of key spectra. Atom% values from surveys are based on sample, as received, and Scofield cross-sections.

2022年1月13日 · This study shows that a targeted PbSeO 3 layer thickness of 400 nm formed during the oxidation process is necessary to (1) restrict the top PbI 2 layer thickness to less than 200 nm, (2) regulate the iodization process, allowing trace amounts of iodine to diffuse along grain boundaries to recrystallize the PbSe base-layer, and (3) preserve the ...

We provide the carrier transport properties of the polycrystalline PbSe material prepared by iodine concentration manipulation. We discover that the activation energy of the crystallite boundary...

The inorganic part of the film (Pb, S and inorganic ligand shell) can be examined by X-ray photoelectron spectroscopy (XPS), [120,122] ICP-AES [6,123] or energy-dispersive X-ray spectroscopy (EDX...