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Spiegelman F, Tarrat N, Cuny J, Dontot L, Posenitskiy E, Martí C, Simon A, Rapacioli M. Density-functional tight-binding: basic concepts and applications to molecules and clusters. Adv Phys X 2020; 5:1710252. [PMID: 33154977 PMCID: PMC7116320 DOI: 10.1080/23746149.2019.1710252] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 12/19/2019] [Indexed: 06/10/2023] Open
Abstract
The scope of this article is to present an overview of the Density Functional based Tight Binding (DFTB) method and its applications. The paper introduces the basics of DFTB and its standard formulation up to second order. It also addresses methodological developments such as third order expansion, inclusion of non-covalent interactions, schemes to solve the self-interaction error, implementation of long-range short-range separation, treatment of excited states via the time-dependent DFTB scheme, inclusion of DFTB in hybrid high-level/low level schemes (DFT/DFTB or DFTB/MM), fragment decomposition of large systems, large scale potential energy landscape exploration with molecular dynamics in ground or excited states, non-adiabatic dynamics. A number of applications are reviewed, focusing on -(i)- the variety of systems that have been studied such as small molecules, large molecules and biomolecules, bare orfunctionalized clusters, supported or embedded systems, and -(ii)- properties and processes, such as vibrational spectroscopy, collisions, fragmentation, thermodynamics or non-adiabatic dynamics. Finally outlines and perspectives are given.
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Affiliation(s)
- Fernand Spiegelman
- Laboratoire de Chimie et Physique Quantiques LCPQ/IRSAMC, UMR5626, Université de Toulouse (UPS)and CNRS, Toulouse, France
| | - Nathalie Tarrat
- CEMES, Université de Toulouse (UPS), CNRS, UPR8011, Toulouse, Toulouse, France
| | - Jérôme Cuny
- Laboratoire de Chimie et Physique Quantiques LCPQ/IRSAMC, UMR5626, Université de Toulouse (UPS)and CNRS, Toulouse, France
| | - Leo Dontot
- Laboratoire de Chimie et Physique Quantiques LCPQ/IRSAMC, UMR5626, Université de Toulouse (UPS)and CNRS, Toulouse, France
| | - Evgeny Posenitskiy
- Laboratoire Collisions Agrégats et Réactivité LCAR/IRSAMC, UMR5589, Université de Toulouse (UPS) and CNRS, Toulouse, France
| | - Carles Martí
- Laboratoire de Chimie et Physique Quantiques LCPQ/IRSAMC, UMR5626, Université de Toulouse (UPS)and CNRS, Toulouse, France
- Laboratoire de Chimie, UMR5182, Ecole Normale Supérieure de Lyon, Université de Lyon and CNRS, Lyon, France
| | - Aude Simon
- Laboratoire de Chimie et Physique Quantiques LCPQ/IRSAMC, UMR5626, Université de Toulouse (UPS)and CNRS, Toulouse, France
| | - Mathias Rapacioli
- Laboratoire de Chimie et Physique Quantiques LCPQ/IRSAMC, UMR5626, Université de Toulouse (UPS)and CNRS, Toulouse, France
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Adamow A, Sznitko L, Chrzumnicka E, Stachera J, Szukalski A, Martynski T, Mysliwiec J. The ultra-photostable and electrically modulated Stimulated Emission in perylene-based dye doped liquid crystal. Sci Rep 2019; 9:2143. [PMID: 30765751 PMCID: PMC6376009 DOI: 10.1038/s41598-019-38484-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 12/17/2018] [Indexed: 11/08/2022] Open
Abstract
One of the most important drawback of organic dyes is their low photo-stability which reduces possibility of their commercial utilization. In this article we employ the strategy of dye re-crystallization from oversaturated matrix in order to enhance material's durability. One of the main advantages of perylene derivative is ability to form emissive j-aggregates, good miscibility and incorporation into liquid crystalline matrix. Investigation of perylene-based dye and LC matrix brought as the result very efficient light amplification modulation by applied external electric field. In our article we show that Stimulated Emission (STE) is possible to achieve from perylene-derivative based system, at typical fluence thresholds for laser dyes: 3.9 mJ/cm2. Moreover, presented system proves ultra-high photostability, showing lack of STE reduction even after 12 000 excitation laser pulses. Furthermore, we proved the possibility of light emission intensity control using external electric field.
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Affiliation(s)
- A Adamow
- The Advanced Materials Engineering and Modelling Group, Wroclaw University of Science and Technology, Wybrzeze Stanislawa Wyspianskiego 27, 50-370, Wroclaw, Poland
| | - L Sznitko
- The Advanced Materials Engineering and Modelling Group, Wroclaw University of Science and Technology, Wybrzeze Stanislawa Wyspianskiego 27, 50-370, Wroclaw, Poland
| | - E Chrzumnicka
- Institute for Materials Research and Quantum Engineering, Faculty of Technical Physic, Poznan University of Technology, Piotrowo 3, 60-965, Poznan, Poland
| | - J Stachera
- Institute for Materials Research and Quantum Engineering, Faculty of Technical Physic, Poznan University of Technology, Piotrowo 3, 60-965, Poznan, Poland
| | - A Szukalski
- The Advanced Materials Engineering and Modelling Group, Wroclaw University of Science and Technology, Wybrzeze Stanislawa Wyspianskiego 27, 50-370, Wroclaw, Poland
| | - T Martynski
- Institute for Materials Research and Quantum Engineering, Faculty of Technical Physic, Poznan University of Technology, Piotrowo 3, 60-965, Poznan, Poland
| | - J Mysliwiec
- The Advanced Materials Engineering and Modelling Group, Wroclaw University of Science and Technology, Wybrzeze Stanislawa Wyspianskiego 27, 50-370, Wroclaw, Poland.
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Plötz PA, Megow J, Niehaus T, Kühn O. All-DFTB Approach to the Parametrization of the System-Bath Hamiltonian Describing Exciton-Vibrational Dynamics of Molecular Assemblies. J Chem Theory Comput 2018; 14:5001-5010. [PMID: 30141929 DOI: 10.1021/acs.jctc.8b00493] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Spectral density functions are central to the simulation of complex many body systems. Their determination requires making approximations not only to the dynamics but also to the underlying electronic structure theory. Here, blending different methods bears the danger of an inconsistent description. To solve this issue we propose an all-DFTB approach to determine spectral densities for the description of Frenkel excitons in molecular assemblies. The protocol is illustrated for a model of a PTCDI crystal, which involves the calculation of monomeric excitation energies and Coulomb couplings between monomer transitions, as well as their spectral distributions due to thermal fluctuations of the nuclei. Using dynamically defined normal modes, a mapping onto the standard harmonic oscillator spectral densities is achieved.
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Affiliation(s)
- Per-Arno Plötz
- Institut für Physik , Universität Rostock , Albert-Einstein-Strasse 23-24 , 18059 Rostock , Germany
| | - Jörg Megow
- Institut für Chemie , Universität Potsdam , Karl-Liebknecht-Strasse 24-25 , 14476 Potsdam , Germany
| | - Thomas Niehaus
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Villeurbanne , France
| | - Oliver Kühn
- Institut für Physik , Universität Rostock , Albert-Einstein-Strasse 23-24 , 18059 Rostock , Germany
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Engels B, Engel V. The dimer-approach to characterize opto-electronic properties of and exciton trapping and diffusion in organic semiconductor aggregates and crystals. Phys Chem Chem Phys 2017; 19:12604-12619. [DOI: 10.1039/c7cp01599b] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We present the recently developed dimer approach which seems to include all main effects determining the photo-physics of organic semiconductor aggregates.
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Affiliation(s)
- Bernd Engels
- Universität Würzburg
- Institut für Physikalische und Theoretische Chemie
- Am Hubland
- 97074 Würzburg
- Germany
| | - Volker Engel
- Universität Würzburg
- Institut für Physikalische und Theoretische Chemie
- Am Hubland
- 97074 Würzburg
- Germany
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