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Trigui A.,University of Sfax | Mlayah A.,Toulouse 1 University Capitole | Abid Y.,University of Sfax | Zwick A.,Toulouse 1 University Capitole | Boughzala H.,Laboratoire Of Cristallochimie Et Des Materiaux
Journal of Applied Physics | Year: 2012

In this work we investigate the excitonic properties of (4-FC 6H4C2H4NH3) 2PbI4 hybrid organic/inorganic thin films. We first use a standard point-by-point photoluminescence mapping. The maps formed using the photoluminescence intensity, line width, and broadening reveal the presence of structural defects. Using a statistical treatment of the data we found that the spatial fluctuations of the photoluminescence peak wavelengths are rather small compared to the photoluminescence line width. Moreover, we report the first direct observation of spatially resolved excitonic photoluminescence in this type of materials using dark-field imaging of white-light pumped photoluminescence. Owing to the rapid acquisition time of the dark-field images, their temperature dependence was studied, and the thermal behavior of the photoluminescence was investigated using this technique. We show that photoluminescence mapping combined with dark-field imaging and spectroscopy provides valuable information on the excitonic properties of hybrid organic/inorganic thin films. © 2012 American Institute of Physics.


Trigui A.,University of Sfax | Boughzala H.,Laboratoire Of Cristallochimie Et Des Materiaux | Driss A.,Laboratoire Of Cristallochimie Et Des Materiaux | Abid Y.,University of Sfax
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

The organic-inorganic hybrid, {(C6H13N 3)2[Pb3I10]}n, was obtained by the reaction of 1-(3-ammonio-prop-yl)imidazolium triiodide and PbI2 at room temperature. The structure contains one-dimensional {[Pb3I10]4-}n polymeric anions spreading parallel to [001], resulting from face-face-edge association of PbI6 distorted octa-hedra. One of the PbII cations is imposed at an inversion centre, whereas the second occupies a general position. N - H⋯I hydrogen bonds connect the organic cations and inorganic anions.


Dammak T.,University of Sfax | Boughzala H.,Laboratoire Of Cristallochimie Et Des Materiaux | Mlayah A.,Toulouse 1 University Capitole | Abid Y.,University of Sfax
Journal of Luminescence | Year: 2016

Single crystals of a hybrid organic/inorganic material with the formula (C4N3H16)Cl[CuCl4] were elaborated and studied by X-ray diffraction, and photoluminescence. The crystals consist of a self-assembled multilayer structure with a Pnam space group. The structure is built up from the staking of infinite two-dimensional layers of CuCl6 corner-sharing octahedra, separated by organic (C4N3H16)3+ chains. Such a structure may be regarded as a multi quantum well system, in which CuCl6 layers act as semiconductor wells and the organic molecules act as insulator barriers Furthermore, the room temperature IR and Raman spectra of the title compound were recorded and analyzed. For optical investigations, thin films have been prepared by spin-coating method from the ethanol solution of the material. Optical absorption spectra shows characteristic absorptions of CuCl-based layered perovskite centered at 300 and 380 nm, whereas the photoluminescence spectra shows a bleu intense emission around 420 nm, associated to radiative recombination of confined excitons in the CuCl6 Quantum wells. © 2016 Elsevier B.V. All rights reserved.


Ferjani H.,Laboratoire Of Cristallochimie Et Des Materiaux | Boughzala H.,Laboratoire Of Cristallochimie Et Des Materiaux | Driss A.,Laboratoire Of Cristallochimie Et Des Materiaux
Acta Crystallographica Section E: Structure Reports Online | Year: 2012

The structure of the title organic-inorganic hybrid compound, {(C 2H7N4O)2[BiCl5]} n , consists of corrugated chains parallel to [100] of corner-joined [BiCl6] octa-hedra, separated by layers of organic 1-carbamoylguanidinum cations. The crystal cohesion is achieved by N - H⋯O and N - H⋯Cl hydrogen bonds, which link the organic and inorganic parts of the structure. © Ferjani et al. 2012.


PubMed | Laboratoire Of Cristallochimie Et Des Materiaux
Type: Journal Article | Journal: Acta crystallographica. Section E, Structure reports online | Year: 2012

The structure of the title organic-inorganic hybrid compound, {(C(2)H(7)N(4)O)(2)[BiCl(5)]}(n), consists of corrugated chains parallel to [100] of corner-joined [BiCl(6)] octa-hedra, separated by layers of organic 1-carbamoylguanidinum cations. The crystal cohesion is achieved by N-HO and N-HCl hydrogen bonds, which link the organic and inorganic parts of the structure.

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