Photoluminescence of CsMI<sub>3</sub>:Eu<sup>2+</sup> (M = Mg, Ca, and Sr) – a spectroscopic probe on structural distortions

Suta, Markus; Wickleder, Claudia

doi:10.1039/c5tc00515a

Cited by 47 publications

(77 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The study of photoluminescence properties of Eu 2+ ‐doped CsMI 3 [M‐Mg, Ca, Sr] perovskite has revealed that the Eu 2+ ‐doped CsMgI 3 and CsSrI 3 displayed a redshift emission with respect to Eu 2+ ‐doped CsCaI 3 perovskite. Eu 2+ ‐doped CsMgI 3 crystallizes in a distorted hexagonal CsNiCl 3 structure whereas CsCaI 3 crystallizes in an orthorhombic GdFeO 3 structure and CsSrI 3 crystallizes in a filled PuBr 3 structure …”

Section: Lead‐free Perovskitesmentioning

confidence: 99%

“…The divalent rare earth Eu 2+ ‐based perovskite (C 4 H 9 NH 3 ) 2 EuI 4 has been synthesized through low‐temperature solid‐state reactions . The effect of doping of rare earth metal ions such as Eu 2+ , Tm 2+ , and Yb 2+ in CsAX 3 (A‐Ca,Mg,Sr) perovskite has been investigated extensively . Another transition metal gold has been investigated for its potential in a perovskite framework.…”

Section: Lead‐free Perovskitesmentioning

confidence: 99%

“…whereas CsCaI 3 crystallizes in an orthorhombic GdFeO 3 structure and CsSrI 3 crystallizes in a filled PuBr 3 structure. [280] The divalent Ca 2+ has an ionic radius (100 pm) comparable to that of Pb 2+ (119 pm) [281,282] whereas Sr 2+ (118 pm) has a similar ionic radii to Pb 2+ (119 pm). [283] The divalent Ba 2+ has an ionic radii of 135 pm larger than that of Pb 2+ (119 pm).…”

Section: Other Potential Candidates For Lead-free Perovskitesmentioning

confidence: 99%

“…[290] The effect of doping of rare earth metal ions such as Eu 2+ , Tm 2+ , and Yb 2+ in CsAX 3 (A-Ca,Mg,Sr) perovskite has been investigated extensively. [280,291,292] Another transition metal gold has been investigated for its potential in a perovskite framework. The optical properties of gold-based 2D organic mixed Au I /Au III [293] Another transition metal tellurium-based vacancy order perovskite Cs 2 TeI 6 has been reported that consists of a face-centered lattice of [TeI 6 ] 4− units with Cs 2+ cations occupying the cuboctahedral position.…”

Section: Other Potential Candidates For Lead-free Perovskitesmentioning

confidence: 99%

See 3 more Smart Citations

Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review

Kour¹,

et al. 2019

View full text Add to dashboard Cite

Lead halide perovskites have displayed the highest solar power conversion efficiencies of 23% but the toxicity issues of these materials need to be addressed. Lead‐free perovskites have emerged as viable candidates for potential use as light harvesters to ensure clean and green photovoltaic technology. The substitution of lead by Sn, Ge, Bi, Sb, Cu and other potential candidates have reported efficiencies of up to 9%, but there is still a dire need to enhance their efficiencies and stability within the air. A comprehensive review is given on potential substitutes for lead‐free perovskites and their characteristic features like energy bandgaps and optical absorption as well as photovoltaic parameters like open‐circuit voltage (VOC), fill factor, short‐circuit current density (J SC), and the device architecture for their efficient use. Lead‐free perovskites do possess a suitable bandgap but have low efficiency. The use of additives has a significant effect on their efficiency and stability. The incorporation of cations like diethylammonium, phenylethyl ammonium, phenylethyl ammonium iodide, etc., or mixed cations at different compositions at the A‐site is reported with engineered bandgaps having significant efficiency and stability. Recent work on the advancement of lead‐free perovskites is also reviewed.

show abstract

Section: Lead‐free Perovskitesmentioning

confidence: 99%

Section: Lead‐free Perovskitesmentioning

confidence: 99%

Section: Other Potential Candidates For Lead-free Perovskitesmentioning

confidence: 99%

Section: Other Potential Candidates For Lead-free Perovskitesmentioning

confidence: 99%

See 2 more Smart Citations

Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review

Kour¹,

et al. 2019

View full text Add to dashboard Cite

show abstract

“…These compounds may be interesting as an experimental standard for theoretical models of the electronic structure of Yb 2+ and as potential novel scintillators in accordance with the respective Eu 2+ -doped compounds. [44][45][46][47][48][49] The photoluminescence properties of Eu 2+ have already been reported in these compounds [44][45][46][47][48][49][50][51][52] which also allows a comparison between the spectroscopic properties of both divalent lanthanides. All starting materials were pre-dried in a dynamic vacuum at 200 1C overnight, respectively, to remove all water contents.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence properties of Yb²⁺ ions doped in the perovskites CsCaX₃ and CsSrX₃ (X = Cl, Br, and I) – a comparative study

Suta

Urland

Daul

et al. 2016

Phys. Chem. Chem. Phys.

Self Cite

View full text Add to dashboard Cite

The Yb(2+)-doped perovskite derivatives CsMX3 (M = Ca and Sr; X = Cl, Br, and I) are ideal systems for obtaining a detailed insight into the structure-luminescence relationship of divalent lanthanides. The investigation of the respective photoluminescence properties yielded two emission bands in the violet and blue spectral range for all compounds, which are assigned to the spin-allowed and spin-forbidden 5d-4f transitions, respectively. The impact on their energetic positions is dependent on both the covalency of the Yb(2+)-halide bond and the corresponding bond length in agreement with expectations. The excitation spectra provide a detailed fine structure at low temperatures and can be partly interpreted separating the 4f(13) core from the 5d electron in the excited state. The local crystal field in CsSrI3:Yb(2+) provides a special case due to the trigonal distortion induced by the crystal structure that is clearly evident in the luminescence features of Yb(2+). The structure-property relationship of several spectroscopic key quantities of Yb(2+) in this series of halides is analyzed in detail and parallels the properties of Eu(2+) ions doped in the given perovskites.

show abstract

Spin Crossover of Yb²⁺ in CsCaX₃ and CsSrX₃ (X = Cl, Br, I) – A Guideline to Novel Halide‐Based Scintillators

Suta

Wickleder

2016

Adv Funct Materials

View full text Add to dashboard Cite

In this paper, the temperature dependence of the photoluminescence of Yb2+ doped into the halidoperovskites CsMX3 (M = Ca, Sr; X = Cl, Br, I) is presented. Yb2+ shows spin‐forbidden high‐spin (HS) and spin‐allowed low‐spin (LS) emission bands in all compounds. Upon excitation of the higher energetic LS transition, very different behaviors of the interplay of the two emissive transitions are observed. In the chlorides, the HS‐based emission becomes already dominant at higher temperatures than 50 K; in the bromides, a temperature‐dependent population of the HS state is observed at higher temperatures than 200 K, whereas in the iodides, the LS emission remains dominant even above 300 K. A vibrational relaxation model is attempted for the explanation of this behavior that reveals a very delicate dependence on the mode energies of the [YbX6]4− octahedra. FIR spectra of the pure Yb2+‐based compounds CsYbX3 are also presented to experimentally verify the estimated average mode energies from the model. Finally, the relevance for novel Yb2+‐based scintillators is discussed.

show abstract

Photoluminescence of CsMI₃:Eu²⁺ (M = Mg, Ca, and Sr) – a spectroscopic probe on structural distortions

Abstract: The delicate dependence of the photoluminescence properties of Eu2+ on the structure of the perovskite-analogue iodides CsMI3 (M = Mg, Ca, Sr) is discussed.

Cited by 47 publications

References 44 publications

Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review

Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review

Photoluminescence properties of Yb²⁺ ions doped in the perovskites CsCaX₃ and CsSrX₃ (X = Cl, Br, and I) – a comparative study

Spin Crossover of Yb²⁺ in CsCaX₃ and CsSrX₃ (X = Cl, Br, I) – A Guideline to Novel Halide‐Based Scintillators

Contact Info

Product

Resources

About

Photoluminescence of CsMI3:Eu2+ (M = Mg, Ca, and Sr) – a spectroscopic probe on structural distortions

Abstract: The delicate dependence of the photoluminescence properties of Eu2+ on the structure of the perovskite-analogue iodides CsMI3 (M = Mg, Ca, Sr) is discussed.

Cited by 47 publications

References 44 publications

Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review

Potential Substitutes for Replacement of Lead in Perovskite Solar Cells: A Review

Photoluminescence properties of Yb2+ ions doped in the perovskites CsCaX3 and CsSrX3 (X = Cl, Br, and I) – a comparative study

Spin Crossover of Yb2+ in CsCaX3 and CsSrX3 (X = Cl, Br, I) – A Guideline to Novel Halide‐Based Scintillators

Contact Info

Product

Resources

About

Photoluminescence of CsMI₃:Eu²⁺ (M = Mg, Ca, and Sr) – a spectroscopic probe on structural distortions

Photoluminescence properties of Yb²⁺ ions doped in the perovskites CsCaX₃ and CsSrX₃ (X = Cl, Br, and I) – a comparative study

Spin Crossover of Yb²⁺ in CsCaX₃ and CsSrX₃ (X = Cl, Br, I) – A Guideline to Novel Halide‐Based Scintillators