Excitonic luminescence in the self assembled organic–inorganic quantum well crystal: (C4H3SC2H4–NH3)2[PbI4]

Dammak, Hajer; Triki, Smaı̈l; Mlayah, Adnen; Féki, H.; Abid, Y.

doi:10.1016/j.jlumin.2015.11.008

Cited by 9 publications

(7 citation statements)

References 34 publications

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“…[56] However, in our case, the value obtained for Γ ac is very low (10 −12 meV K −1 ) comparing to other homologous materials. [57,58] On the other hand, we obtained Γ op = 40 (2) meV, which is in the same order of magnitude as the values obtained for other white-light emitting compounds. [43,45] Therefore, we can deduce that even at low temperatures, optical phonon coupling dominates over acoustic phonon coupling, thus indicating the strong nature of exciton-optical phonon coupling in TETAPb 2 Br 8 in this range of temperature.…”

Section: Temperature Dependence Of the Optical Propertiessupporting

confidence: 87%

“…It is well known that at low temperatures, acoustic phonon coupling dominates over optical phonon coupling in polar semiconductors . However, in our case, the value obtained for Γ ac is very low (10 −12 meV K −1 ) comparing to other homologous materials . On the other hand, we obtained Γ op = 40 meV, which is in the same order of magnitude as the values obtained for other white‐light emitting compounds .…”

Section: Resultssupporting

confidence: 71%

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Negative Thermal Quenching of Efficient White‐Light Emission in a 1D Ladder‐Like Organic/Inorganic Hybrid Material

Barkaoui

Abid

Zelewski

et al. 2019

Advanced Optical Materials

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semiconducting properties as well as their ability to process materials using low temperature techniques. [6][7][8][9] Their crystal structures generally consist of layered metal halide sheets alternating with organic cations. The inorganic and organic components are linked by hydrogen bonds to form the perovskite-like structure. [10][11][12] White-light emission has been recently discovered in several 2D OIH layered perovskites and has been attributed to the self-trapping of excitons within the hybrid material. [13][14][15][16][17][18][19][20][21][22] This important discovery sets the stage for exploring white-light emitting diodes (WLEDs) based on such materials which exhibit a photoluminescence (PL) quantum yield (QY) that can reach 32.5%. [23] However, since the first reports of 1D OIH compounds in 1995 by Papavassiliou et al. and Mitzi et al.,[24,25] investigations of these low-dimensional materials have remained scarcely reported, despite their many benefits such as high exciton stability, strong quantum confinement, and their ability to combine various types of sharing metal halide octahedral within a single chain. Yet, it can be denoted that 1D materials have regained an increasing interest for the last 2 years The synthesis and the optical properties of a new organic-inorganic hybrid material (C 6 H 22 N 4 )[Pb 2 Br 8 ] (abbreviated as TETAPb 2 Br 8 ) is reported here.Its ladder-like crystal structure is built up from infinite 1D chains of cornersharing [Pb 2 Br 8 ] 4− bi-octahedra surrounded by tetra-protonated triethylenetetramine (abbreviated as TETA 4+ ) organic cations. Under UV excitation, this hybrid organic-inorganic compound emits white light due to radiative recombinations of self-trapped excitons associated with a structural distortion of the PbBr 6 octahedra. Thin films of TETAPb 2 Br 8 show a photoluminescence (PL) quantum yield of ≈11% and exhibit a Commission Internationale de l'Eclairage coordinates of (0.32, 0.37). In the low-temperature range, the PL intensity increases with increasing temperature. This negative thermal quenching of white-light emission is interpreted in terms of transitions between excitonic states involving an exciton-phonon interaction. The interpretations are supported by the temperature dependence of the resonant Raman scattering and by density functional theory calculations.

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Section: Temperature Dependence Of the Optical Propertiessupporting

confidence: 87%

Section: Resultssupporting

confidence: 71%

Negative Thermal Quenching of Efficient White‐Light Emission in a 1D Ladder‐Like Organic/Inorganic Hybrid Material

Barkaoui

Abid

Zelewski

et al. 2019

Advanced Optical Materials

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“…4 and 5. This phenomenon has also been observed in some 2D-OI compounds 15 , but the mechanism remains unclear. Duration curves of the PL of single-crystalline and OIiG samples are shown in Fig.…”

Section: Resultsmentioning

confidence: 72%

Rapid Synthesis of Quantum-Sized Organic–Inorganic Perovskite Nanocrystals in Glass

Shinozaki

Kawano

2020

Sci Rep

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A bulk sample of an organic-inorganic (oi) perovskite crystal of (c 6 H 5 c 2 H 4 nH 3 ) 2 pbBr 4 with a layered structure showing excellent luminescent properties was rapidly synthesised. the raw materials of oi crystal were impregnated into nanoporous glass having 4-nm pores and dried, obtaining a translucent sample of oi nanocrystals in glass (oiiG). An absorbance shoulder was observed at E = 3.04 eV for OIiG, which was attributed to exciton bands, and photoluminescence (PL) duration times of τ 1 = 2.8 ns and τ 2 = 8.6 ns were recorded for OIiG. In contrast, for a single-crystal sample, E = 2.94 eV, τ 1 = 4.1 ns, τ 2 = 11.0 ns. Compared to those of the single-crystal sample, the OIiG has a higher absorbance energy, and the duration time was shorter. The exciton activation energy was 195 meV for OIiG, in contrast with 121 meV for single crystal. We propose that these changes are due to the size effect because the particle size (3-4 nm in diameter) in the OIiG is close to the Bohr radius of layer-structured OI crystals. open Scientific RepoRtS | (2020) 10:1237 | https://doi.

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“…Single crystals of AQPbCl 4 were synthesized by slow solvent evaporation at room temperature. , First, the 3-aminiquimoline ammonium salt (C 9 H 8 N 2 )·2HCl (abbreviated as AQ(HCl) 2 ) was obtained using the reaction between 3-aminiquimoline C 9 H 8 N 2 with an aqueous solution of HCl (37%). Then, 1 mmol of the resulting AQ(HCl) 2 and 1 mmol of PbCl 2 with excess aqueous HCl solution (37%) were well stirred and kept in the dark at ambient temperature .…”

Section: Experimental Methodsmentioning

confidence: 99%

Yellowish White-Light Emission Involving Resonant Energy Transfer in a New One-Dimensional Hybrid Material: (C₉H₁₀N₂)PbCl₄

et al. 2018

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The present work deals with a new one-dimensional (1D) organic–inorganic hybrid material, namely (C9H10N2)PbCl4 (abbreviated as AQPbCl4). Its crystal structure is built up from the infinite 1D chain of edge-sharing PbCl6 octahedra surrounded by 3-aminoquinoline (abbreviated as AQ) organic molecules. Contrary to the most organic–inorganic hybrid materials, where the organic moieties act as barriers and the inorganic parts play the role of quantum wells, both inorganic and organic parts in AQPbCl4 are optically active, giving rise to optical properties involving the competition and the interaction of two organic and inorganic emitting entities. Under UV excitation, this hybrid compound shows a strong yellowish white-light emission that can be seen even with the naked eye and at room temperature. The photoluminescence spectrum is composed of a strong and broad yellow band at 538 nm associated with π–π* transition localized within the AQ organic molecule and a less intense band in the UV region at 340 nm associated with an inorganic Wannier exciton confined in the PbCl4 inorganic wires. These attributions were made possible thanks to comparisons with homologous materials, and they were supported by theoretical band structure calculations. In addition, both theoretical and experimental investigations suggest that emission involves a resonant energy transfer mechanism in which the inorganic PbCl4 wires act as donor, and the organic cations act as acceptor. Moreover, the temperature dependence study of photoluminescence led to an estimation of the binding energies of interacting excitons and showed that the energy transfer mechanism is characterized by a remarkable enhancement of the emission band intensity.

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Excitonic luminescence in the self assembled organic–inorganic quantum well crystal: (C4H3SC2H4–NH3)2[PbI4]

Cited by 9 publications

References 34 publications

Negative Thermal Quenching of Efficient White‐Light Emission in a 1D Ladder‐Like Organic/Inorganic Hybrid Material

Negative Thermal Quenching of Efficient White‐Light Emission in a 1D Ladder‐Like Organic/Inorganic Hybrid Material

Rapid Synthesis of Quantum-Sized Organic–Inorganic Perovskite Nanocrystals in Glass

Yellowish White-Light Emission Involving Resonant Energy Transfer in a New One-Dimensional Hybrid Material: (C₉H₁₀N₂)PbCl₄

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Excitonic luminescence in the self assembled organic–inorganic quantum well crystal: (C4H3SC2H4–NH3)2[PbI4]

Cited by 9 publications

References 34 publications

Negative Thermal Quenching of Efficient White‐Light Emission in a 1D Ladder‐Like Organic/Inorganic Hybrid Material

Negative Thermal Quenching of Efficient White‐Light Emission in a 1D Ladder‐Like Organic/Inorganic Hybrid Material

Rapid Synthesis of Quantum-Sized Organic–Inorganic Perovskite Nanocrystals in Glass

Yellowish White-Light Emission Involving Resonant Energy Transfer in a New One-Dimensional Hybrid Material: (C9H10N2)PbCl4

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Yellowish White-Light Emission Involving Resonant Energy Transfer in a New One-Dimensional Hybrid Material: (C₉H₁₀N₂)PbCl₄