Electronic energy levels of CsCdCl3

Demirbilek, R.; Bozdoğan, A. Çelik; Çalışkan, Murat; Asan, G.; Özen, G.

doi:10.1016/j.jlumin.2011.05.003

Cited by 22 publications

(34 citation statements)

References 13 publications

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“…Figure c shows the absorption spectra of samples with increasing Sb doping amount. Both undoped RbCdCl 3 and Sb-doped RbCdCl 3 powders have absorption peaks in the range of 265 nm, which are related to the intrinsic absorption band of RbCdCl 3 that comes from the CT transition in [CdCl 6 ] 4– . − With increasing Sb 3+ concentration, clear peak profiles were observed in the 300–350 nm range, and their absorption coefficient increased with increasing Sb 3+ concentration, which should be caused by the incorporation of Sb 3+ ions into the host lattice, and the latter Sb–Cl charge transfer absorption had a larger absorption coefficient in this range with a double band. This phenomenon is common in other Sb 3+ -doped halide perovskites. , In Figure d and Table S3, we haved used a single-exponential fitting method to get the PL decay process of the samples with different doping ratios with the PL peak at 596 nm under 322 nm excitation.…”

Section: Resultsmentioning

confidence: 99%

Efficient Yellow Self-Trapped Exciton Emission in Sb³⁺-Doped RbCdCl₃ Metal Halides

et al. 2022

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Metal halide perovskites have flexible crystal and electronic structures and adjustable emission characteristics, which have very broad applications in the optoelectronic field. Among them, all-inorganic perovskites have attracted more attention than others in recent years because of their characteristics of large diffusion length, high luminescence efficiency, and good stability. In this work, Sb 3+ -doped RbCdCl 3 crystalline powder was synthesized by a simple hydrothermal method, and its luminescence properties were studied, which showed a broad emission band with a large Stokes shift and efficient yellow light emission at about 596 nm at room temperature with a photoluminescence quantum yield of 91.7%. The emission came from the transition of the selftrapped exciton 1 (STE1) out of 3 P n (n = 0, 1, and 2) to S 0 due to strong electron−phonon coupling, which scaled with increasing temperature. Moreover, its emission color became white at low temperatures due to the occurrence of transition of other self-trapped exciton 0 (STE0) state emission out of the 1 S states of Sb ions to S 0 in the lattice. These emission color changes may be used for temperature sensing, and this Sb 3+ -doped RbCdCl 3 material expands the knowledge of the efficient luminescent inorganic material family for further applications of allinorganic perovskites.

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Section: Resultsmentioning

confidence: 99%

Efficient Yellow Self-Trapped Exciton Emission in Sb³⁺-Doped RbCdCl₃ Metal Halides

et al. 2022

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“…CsCdCl 3 , which had been previously synthesized as single crystals, was found in several studies to have a band gap that is on the order of 5 eV, , which places it in a rare category of ultrawide-band-gap materials. Anticipating that the different Cs–Cd–Cl phases would have different band gaps, we used diffuse reflectance UV–vis spectroscopy to determine the optical band gaps of our nanoscopic CsCdCl 3 , Cs 2 CdCl 4 , and Cs 3 Cd 2 Cl 7 materials.…”

Section: Resultsmentioning

confidence: 99%

“…CsCdCl 3 , which had been previously synthesized as single crystals, was found in several studies to have a band gap that is on the order of 5 eV, 48,49 1 The larger band gaps of the cadmium vs lead compounds are attributed to the larger Cd−Cl vs Pb−Cl electronegativity differences. The experimental band gap for CsCdCl 3 , determined here to be 5.13 eV, falls within the previously reported range of band gaps for this material.…”

Section: ■ Introductionmentioning

confidence: 99%

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Phase-Selective Solution Synthesis of Perovskite-Related Cesium Cadmium Chloride Nanoparticles

et al. 2020

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All-inorganic metal halide perovskite-related phases are semiconducting materials that are of significant interest for a wide range of applications. Nanoparticles of these materials are particularly useful because they permit solution processing while offering unique and tunable properties. Of the many metal halide systems that have been studied extensively, cesium cadmium chlorides remain underexplored, and synthetic routes to access them as nanoscale materials have not been established. Here we demonstrate that a simple solution-phase reaction involving the injection of a cesium oleate solution into a cadmium chloride solution produces three distinct cesium cadmium chlorides: hexagonal CsCdCl3 and the Ruddlesden–Popper layered perovskites Cs2CdCl4 and Cs3Cd2Cl7. The phase-selective synthesis emerges from differences in reagent concentrations, temperature, and injection rates. A key variable is the rate at which the cesium oleate solution is injected into the cadmium chloride solution, which is believed to influence the local Cs:Cd concentration during precipitation, leading to control over the phase that forms. Band structure calculations indicate that hexagonal CsCdCl3 is a direct band gap semiconductor while Cs2CdCl4 and Cs3Cd2Cl7 have indirect band gaps. The experimentally determined band gap values for CsCdCl3, Cs2CdCl4, and Cs3Cd2Cl7 are 5.13, 4.91, and 4.70 eV, respectively, which places them in a rare category of ultrawide-band-gap semiconductors.

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“…CsCdCl 3 has the prerequisite for a promising optoelectronic material with excellent structural stability due to its tolerance factor ( t ) of 0.89 (0.87 for CsPbCl 3 ). Most notably, the unique bonding mode for CsCdCl 3 leads to a strong structural distortion, which is prone to induce the formation of STEs that have a great luminescence potential . However, the research of CsCdCl 3 has mainly focused on theoretical calculations, Raman spectra, and electron paramagnetic resonance (EPR) and studies are lacking on its luminescence properties, which is due to the easy formation of impurity phases such as Cs 2 CdCl 4 and Cs 3 Cd 2 Cl 7 during the synthesis process. − Therefore, it will be meaningful if pure CsCdCl 3 can be synthesized using a simple synthesis method and an effective method is proposed to improve its luminescence performance …”

Section: Introductionmentioning

confidence: 99%

Realizing Efficient Emission in Three-Dimensional CsCdCl₃ Single Crystals by Introducing Separated Emitting Centers

Zhang

Zhou

et al. 2022

Inorg. Chem.

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Hitherto, three-dimensional (3D) perovskite single crystals with a low exciton binding energy generally possess inferior photoluminescence (PL) performance due to the spatially unconfined nature of excitons. In this work, 3D CsCdCl3 single crystals with multiple emissions from self-trapped excitons (STEs) have been developed, which unsurprisingly exhibit a discouraging PL quantum yield (PLQY) of ∼4.8%. To improve the luminescence efficiency, Mn2+ and Sn2+ are introduced into the lattice as dopants, respectively. By embedding Mn2+ ion into CsCdCl3, the long Mn–Mn distance enables the resultant material to produce an intense orange emission (∼100% PLQY) from the d–d orbital transition (4T1–6A1) of Mn2+. Intriguingly, the embedded Sn2+ triggers the formation of Jahn–Teller-like STEs that induces a subsequent deep red emission with a PLQY of ∼28.22%, which is quite high for 3D bulk perovskites. Such a remarkable PL efficiency is attributed to the distinctive bonding mode of CsCdCl3 that encourages the expression of the Sn 5s2 lone pair. Furthermore, a white-light-emitting diode (WLED) is also fabricated with Mn2+-doped CsCdCl3 to show its potential in lighting application. This work paves a new avenue to improve the luminescence performance of bulk 3D perovskite materials.

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Electronic energy levels of CsCdCl3

Cited by 22 publications

References 13 publications

Efficient Yellow Self-Trapped Exciton Emission in Sb³⁺-Doped RbCdCl₃ Metal Halides

Efficient Yellow Self-Trapped Exciton Emission in Sb³⁺-Doped RbCdCl₃ Metal Halides

Phase-Selective Solution Synthesis of Perovskite-Related Cesium Cadmium Chloride Nanoparticles

Realizing Efficient Emission in Three-Dimensional CsCdCl₃ Single Crystals by Introducing Separated Emitting Centers

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Electronic energy levels of CsCdCl3

Cited by 22 publications

References 13 publications

Efficient Yellow Self-Trapped Exciton Emission in Sb3+-Doped RbCdCl3 Metal Halides

Efficient Yellow Self-Trapped Exciton Emission in Sb3+-Doped RbCdCl3 Metal Halides

Phase-Selective Solution Synthesis of Perovskite-Related Cesium Cadmium Chloride Nanoparticles

Realizing Efficient Emission in Three-Dimensional CsCdCl3 Single Crystals by Introducing Separated Emitting Centers

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Efficient Yellow Self-Trapped Exciton Emission in Sb³⁺-Doped RbCdCl₃ Metal Halides

Efficient Yellow Self-Trapped Exciton Emission in Sb³⁺-Doped RbCdCl₃ Metal Halides

Realizing Efficient Emission in Three-Dimensional CsCdCl₃ Single Crystals by Introducing Separated Emitting Centers