Raman spectra of CdF<sub>2</sub> and PbF<sub>2</sub>

Krishnamurthy, N.; Soots, V.

doi:10.1139/p70-143

Cited by 19 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For PbF 2 it is about 340 cm À1 and closely agrees with maximum phonon frequency obtained from Raman spectra measured in Ref. [24]. To the best of our knowledge there is no neutron scattering data in the literature for the LaF 3 and the Gd 2 O 2 S and La 2 O 2 S crystals, but taking into account the result for SrF 2 and PbF 2 , the maximal phonon frequencies for the LaF 3 crystal and the Gd 2 O 2 S and La 2 O 2 S ceramic samples were determined from their Raman spectra.…”

Section: Article In Presssupporting

confidence: 89%

Oxysulfide optical ceramics doped by Nd3+ for one micron lasing

Orlovskii¹,

Basiev²,

Pukhov³

et al. 2007

Journal of Luminescence

View full text Add to dashboard Cite

Section: Article In Presssupporting

confidence: 89%

Oxysulfide optical ceramics doped by Nd3+ for one micron lasing

Orlovskii¹,

Basiev²,

Pukhov³

et al. 2007

Journal of Luminescence

View full text Add to dashboard Cite

“…As shown in Figure 3d, we observed a low frequency Raman band at %255 cm À1 , which can be assigned to the vibration of Pb-F bond. [32,33] The combined analysis of XPS, FTIR and Raman show the direct evidence that interaction between the F atoms in PDTBDT-FBTand under-coordinated Pb 2þ ions in the perovskite forms the Pb-F bound which effectively passivate the defects associated with Pb 2þ vacancies.…”

Section: Resultsmentioning

confidence: 99%

Defects Passivation With Dithienobenzodithiophene‐based π‐conjugated Polymer for Enhanced Performance of Perovskite Solar Cells

Yang

et al. 2019

Solar RRL

View full text Add to dashboard Cite

A dithienobenzodithiophene‐based π‐conjugated polymer consisting of fluorinated benzotriazole and benzothiadiazole is successfully applied through anti‐solvent method to passivate the defects of perovskite crystals. The fluorinated polymer interacts with under coordinated Pb2+ ions in the perovskite crystals to form Pb‐F bond which effectively passivates the defects. The trap density is reduced and the charge carrier transfer between the perovskite film and Spiro‐OMeTAD is also improved after passivation with the polymer. As a result, a power conversion efficiency (PCE) of 18.03% is achieved in the champion cell. After storing in an ambient environment with 60% relative humidity for 1000 h, the device still retains 90% of the original PCE. These results demonstrate that dithienobenzodithiophene‐based π‐conjugated polymers are promising materials for passivation of perovskite films to further improve the performance and stability of perovskite solar cells.

show abstract

“…the strongest fundamental stretching band of cotunnite is observed at ~100 cm −1 : Bouchard and Smith, 2003). Raman spectra of fluorocronite, PbF 2 (Krishnamurthy and Soots, 1970) and matlockite, PbFCl (Bouchard and Smith, 2003) contain distinct bands in the range 220–260 cm −1 . These bands are absent in the Raman spectrum of napoliite.…”

Section: Raman Spectroscopymentioning

confidence: 99%

Napoliite, Pb₂OFCl, a new mineral from Vesuvius volcano, and its relationship with dimorphous rumseyite

Kasatkin

Siidra

Nestola

et al. 2023

MinMag

View full text Add to dashboard Cite

Napoliite, ideally Pb2OFCl, is a new fluoroxychloride mineral found in a specimen from a fumarole formed subsequent to the 1944 eruption of Vesuvius volcano, Naples Province, Italy. It occurs as well-shaped lamellar crystals up to 0.25 × 0.25 × 0.01 mm typically forming clusters up to 0.4 × 0.4 mm on the surface of volcanic scoria in association with anglesite, artroeite, atacamite, calcioaravaipaite, cerussite, challacolloite, cotunnite, hephaistosite, manuelarossiite, matlockite and susannite. Napoliite is colourless with white streak and adamantine lustre. It is brittle and has a laminated fracture. Cleavage is perfect on {001}. Dcalc = 7.797 g cm–3. The calculated mean refractive index is 2.10. Chemical composition (wt.%, electron microprobe) is: PbO 91.71, F 3.89, Cl 7.34, –O=(F+Cl) –3.30, total 99.64. The empirical formula calculated on the basis of 3 anions is Pb1.999O0.997F0.996Cl1.007. Raman spectroscopy confirms the absence of OH– groups and H2O molecules in the mineral. Napoliite is tetragonal, space group P42/mcm, a = 5.7418(11), c = 12.524(4) Å, V = 412.9(2) Å3 and Z = 4. The strongest lines of the powder X-ray diffraction pattern [d, Å (I, %) (hkl)] are: 3.860 (85) (111); 3.139 (20) (004); 2.914 (100) (113); 2.866 (63) (200); 2.118 (19) (204); 2.027 (19) (220); 1.665 (20) (313); and 1.642 (23) (117). The crystal structure was refined to R1 = 0.024 for 222 reflections with F > 4σ(F). It is based on lead oxide blocks derived from that of litharge PbO, which alternate with layers of chloride ions. Napoliite represents a new structure type with a unique order/disorder pattern of fluorine and oxygen atoms. The new mineral is dimorphous with rumseyite. It is named after the city of Naples (Napoli in Italian).

show abstract

Raman spectra of CdF₂ and PbF₂

Cited by 19 publications

References 0 publications

Oxysulfide optical ceramics doped by Nd3+ for one micron lasing

Oxysulfide optical ceramics doped by Nd3+ for one micron lasing

Defects Passivation With Dithienobenzodithiophene‐based π‐conjugated Polymer for Enhanced Performance of Perovskite Solar Cells

Napoliite, Pb₂OFCl, a new mineral from Vesuvius volcano, and its relationship with dimorphous rumseyite

Contact Info

Product

Resources

About

Raman spectra of CdF2 and PbF2

Cited by 19 publications

References 0 publications

Oxysulfide optical ceramics doped by Nd3+ for one micron lasing

Oxysulfide optical ceramics doped by Nd3+ for one micron lasing

Defects Passivation With Dithienobenzodithiophene‐based π‐conjugated Polymer for Enhanced Performance of Perovskite Solar Cells

Napoliite, Pb2OFCl, a new mineral from Vesuvius volcano, and its relationship with dimorphous rumseyite

Contact Info

Product

Resources

About

Raman spectra of CdF₂ and PbF₂

Napoliite, Pb₂OFCl, a new mineral from Vesuvius volcano, and its relationship with dimorphous rumseyite