1970
DOI: 10.1007/bf01726608
|View full text |Cite
|
Sign up to set email alerts
|

The absorption and luminescence of (PbCl6)4− and (PbBr6)4− complexes

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1

Citation Types

1
15
0
1

Year Published

2017
2017
2021
2021

Publication Types

Select...
8

Relationship

0
8

Authors

Journals

citations
Cited by 16 publications
(17 citation statements)
references
References 2 publications
1
15
0
1
Order By: Relevance
“…3,6,8,9 The decoupled [PbX 6 ] 4– octahedra in Cs 4 PbX 6 , compared to the halide-coupled [PbX 6 ] 4– octahedra in LHP, cause the bandgap of Cs 4 PbX 6 to shift toward values of free [PbX 6 ] 4– clusters in solutions and essentially lead to single molecule-like, excitonic absorption bands. 13,16,29 The fact that Cs 4 PbX 6 phases have bandgap values close to their respective free [PbX 6 ] 4– clusters is also evident from the optical properties of a series of alkali metal halides (AX, A = Na, K, Rb, Cs; X = Cl, Br, I) doped with Pb 2+ . 47 For these materials, the spectral position of the excitonic absorption is almost independent of the alkali metal (NaBr:Pb 2+ = 304 nm, CsBr:Pb 2+ , = 313 nm Cs 4 PbBr 6 = 314 nm), 47,48 while it is strongly dependent on the halide ion.…”
mentioning
confidence: 92%
See 1 more Smart Citation
“…3,6,8,9 The decoupled [PbX 6 ] 4– octahedra in Cs 4 PbX 6 , compared to the halide-coupled [PbX 6 ] 4– octahedra in LHP, cause the bandgap of Cs 4 PbX 6 to shift toward values of free [PbX 6 ] 4– clusters in solutions and essentially lead to single molecule-like, excitonic absorption bands. 13,16,29 The fact that Cs 4 PbX 6 phases have bandgap values close to their respective free [PbX 6 ] 4– clusters is also evident from the optical properties of a series of alkali metal halides (AX, A = Na, K, Rb, Cs; X = Cl, Br, I) doped with Pb 2+ . 47 For these materials, the spectral position of the excitonic absorption is almost independent of the alkali metal (NaBr:Pb 2+ = 304 nm, CsBr:Pb 2+ , = 313 nm Cs 4 PbBr 6 = 314 nm), 47,48 while it is strongly dependent on the halide ion.…”
mentioning
confidence: 92%
“…13 Furthermore, these optical properties were also similar to those of individual [PbBr 6 ] 4– clusters. 16 The proposed origin of the green PL is either intrinsic to Cs 4 PbBr 6 (due to the presence of defects) 11,12,14,1726 or from contamination by CsPbBr 3 NC-like impurities. 13,2742 …”
mentioning
confidence: 99%
“…21 Finally, in the A 4 PbX 6 structure (A = Rb + , Cs + ), the PbX 6 4– octahedra are completely decoupled in all dimensions (Figure 1b), 2226 and the optical properties of such crystals closely resemble those of individual [PbX 6 ] 4– clusters that have been observed experimentally in halide salts doped with Pb 2+ ions. 14,15 This results in insulator band gaps (Cs 4 PbCl 6 = 4.37 eV, Cs 4 PbBr 6 = 3.95 eV, and Cs 4 PbI 6 = 3.38 eV), 2327 and the A 4 PbX 6 phase is thus often referred to as a zero-dimensional (0D) perovskite. While the 3D and 2D phases of LHPs are widely studied and well understood, 0D perovskites are comparatively less explored with only very recent works revisiting the optical properties of Cs 4 PbBr 6 powders and single crystals.…”
mentioning
confidence: 99%
“…As an indirect semiconductor, CsPb 2 Br 5 has a large band gap (ca. 3.4 eV from our UV/Vis absorbance result), which stems from its 2D connectivity character of [PbX 6 ] 4− octahedrons whose band gap Eg≫3.1 eV . In contrast, CsPbBr 3 has a 3D structure, in which [PbX 6 ] 4− octahedrons are connected by sharing the corner, leading to a smaller band gap.…”
Section: Resultsmentioning
confidence: 76%