Blue Emission from Charge-Transfer Excitons in Hybrid Organic–Inorganic Quantum Wires: (ABT) [PbCl3]
| Autor: | Smail Triki, Hamdi Barkaoui, Amira Mahjoubi Samet, Sébastien Pillet, O. Medhioub, Younes Abid |
|---|---|
| Přispěvatelé: | Université de Sfax - University of Sfax, Chimie, Electrochimie Moléculaires et Chimie Analytique (CEMCA), Institut Brestois Santé Agro Matière (IBSAM), Université de Brest (UBO)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Cristallographie, Résonance Magnétique et Modélisations (CRM2), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2019 |
| Předmět: |
[PHYS]Physics [physics]
Work (thermodynamics) Materials science Quantum Wires Exciton Organic/Inorganic Charge (physics) 02 engineering and technology [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Blue emission 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Blue Emission One-dimensional General Energy Chemical physics Organic inorganic [CHIM]Chemical Sciences Physical and Theoretical Chemistry 0210 nano-technology Quantum |
| Zdroj: | Journal of Physical Chemistry C Journal of Physical Chemistry C, American Chemical Society, 2019, 123 (43), pp.26547-26553. ⟨10.1021/acs.jpcc.9b08240⟩ |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.9b08240 |
| Popis: | International audience; Organic-inorganic Hybrid (OIH) materials have the potential of providing synergetic properties and promising novel optical properties. This work focuses on the charge transfer (CT) excitons which play a critical role in a new OIH material, with formula (C7H7N2S) [PbCl3] abbreviated as ABTPbCl3. Its crystal structure is built up from [Pb2Cl8]4- clusters, forming 1D infinite double chains surrounded by 2-aminobenzothiazole (ABT) organic molecules. The density of states calculations demonstrates that ABTPbCl3 has a type-II band alignment, where the Valence Band (VB) and Conduction Band (CB) of the inorganic wires lie upon those of the organic component, respectively. Under UV excitation, the photoluminescence (PL) spectrum of ABTPbCl3 shows a band emission centered at 483 nm. Based on the band alignment, we attribute this bluish emission to CT excitons, which have a lifetime of 3.19 ns. The carriers dynamics is investigated by measuring the luminescence spectra as a function of temperature. At temperature below 210 K, the recombination of carriers is dominated by delocalized excitons, while the mixture of delocalized excitons, electrons and holes are dominating at higher temperature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|