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Bedel Pereira E, Bassaler J, Laval H, Holec J, Monflier R, Mesnilgrente F, Salvagnac L, Daran E, Duployer B, Tenailleau C, Gourdon A, Jancarik A, Séguy I. Benzohexacene guide in accurate determination of field effect carrier mobilities in long acenes. RSC Adv 2022; 12:671-680. [PMID: 35425115 PMCID: PMC8697683 DOI: 10.1039/d1ra07808a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 10/22/2021] [Accepted: 12/09/2021] [Indexed: 11/21/2022] Open
Abstract
Oligoacenes are promising materials in the field of electronic devices since they exhibit high charge carrier mobility and more particularly as a semiconductor in thin film transistors. Herein, we investigate the field effect charge carrier mobility of benzohexacene, recently obtained by cheletropic decarbonylation at moderate temperature. Initially, high performance bottom contact organic thin-film transistors (OTFTs) were fabricated using tetracene to validate the fabrication process. For easier comparison, the geometries and channel sizes of the fabricated devices are the same for the two acenes. The charge transport in OTFTs being closely related to the organic thin film at the dielectric/organic semiconductor interface, the structural and morphological features of the thin films of both materials are therefore studied according to deposition conditions. Finally, by extracting relevant device parameters the benzohexacene based OTFT shows a four-probe contact-corrected hole mobility value of up to 0.2 cm2 V−1 s−1. Four-probes mobility vs. VGS in the linear regime (VDS = −10 V) for benzohexacene based transistor.![]()
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Affiliation(s)
| | - J. Bassaler
- LAAS-CNRS, Université de Toulouse, UPS, 31031 Toulouse, France
| | - H. Laval
- LAAS-CNRS, Université de Toulouse, UPS, 31031 Toulouse, France
| | - J. Holec
- CEMES-CNRS, 29 Rue J. Marvig, 31055 Toulouse, France
| | - R. Monflier
- LAAS-CNRS, Université de Toulouse, UPS, 31031 Toulouse, France
| | - F. Mesnilgrente
- LAAS-CNRS, Université de Toulouse, UPS, 31031 Toulouse, France
| | - L. Salvagnac
- LAAS-CNRS, Université de Toulouse, UPS, 31031 Toulouse, France
| | - E. Daran
- LAAS-CNRS, Université de Toulouse, UPS, 31031 Toulouse, France
| | - B. Duployer
- CIRIMAT, Université de Toulouse, CNRS, Université Toulouse 3 – Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
| | - C. Tenailleau
- CIRIMAT, Université de Toulouse, CNRS, Université Toulouse 3 – Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
| | - A. Gourdon
- CEMES-CNRS, 29 Rue J. Marvig, 31055 Toulouse, France
| | - A. Jancarik
- CEMES-CNRS, 29 Rue J. Marvig, 31055 Toulouse, France
- CRPP, UMR CNRS 5031, Université de Bordeaux, 33600 Pessac, France
| | - I. Séguy
- LAAS-CNRS, Université de Toulouse, UPS, 31031 Toulouse, France
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Sadek D, Dhungana DS, Coratger R, Durand C, Proietti A, Gravelier Q, Reig B, Daran E, Fazzini PF, Cristiano F, Arnoult A, Plissard SR. Integration of the Rhombohedral BiSb(0001) Topological Insulator on a Cubic GaAs(001) Substrate. ACS Appl Mater Interfaces 2021; 13:36492-36498. [PMID: 34296846 DOI: 10.1021/acsami.1c08477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Bismuth-antimony alloy (Bi1 - xSbx) is the first reported 3D topological insulator (TI). Among many TIs reported to date, it remains the most promising for spintronic applications thanks to its large conductivity, its colossal spin Hall angle, and the possibility to build low-current spin-orbit-torque magnetoresistive random access memories. Nevertheless, the 2D integration of TIs on industrial standards is lacking. In this work, we report the integration of high-quality rhombohedral BiSb(0001) topological insulators on a cubic GaAs(001) substrate. We demonstrate a clear epitaxial relationship at the interface, a fully relaxed TI layer, and the growth of a rhombohedral matrix on top of the cubic substrate. The antimony composition of the Bi1 - xSbx layer is perfectly controlled and covers almost the whole TI window. For optimized growth conditions, the sample generates a semiconductor band structure at room temperature in the bulk and exhibits metallic surface states at 77 K.
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Affiliation(s)
- Dima Sadek
- LAAS-CNRS, Université de Toulouse, Toulouse F-31400, France
| | | | - Roland Coratger
- SINANO Group, CEMES-CNRS and Université Paul Sabatier, 29 rue J. Marvig, Toulouse 31055, France
| | - Corentin Durand
- LAAS-CNRS, Université de Toulouse, Toulouse F-31400, France
- SINANO Group, CEMES-CNRS and Université Paul Sabatier, 29 rue J. Marvig, Toulouse 31055, France
| | - Arnaud Proietti
- Centre De Microcaractérisation Raimond Castaing, Espace Clément Ader, 3 Rue Caroline Aigle, Toulouse F-31400, France
| | | | - Benjamin Reig
- LAAS-CNRS, Université de Toulouse, Toulouse F-31400, France
| | | | - Pier Francesco Fazzini
- Laboratoire de Physique et Chimie des Nano-objets, Institut National des Sciences Appliquées, 135 Avenue de Rangueil, Toulouse, Cedex 4 F-31077, France
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He Q, Ranchon H, Carrivain P, Viero Y, Lacroix J, Blatché C, Daran E, Victor JM, Bancaud A. Conformational Manipulation of DNA in Nanochannels Using Hydrodynamics. Macromolecules 2013. [DOI: 10.1021/ma400575h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qihao He
- CNRS, LAAS, 7 avenue
du colonel Roche, F-31400 Toulouse, France
- Universite de Toulouse, LAAS, F-31400 Toulouse, France
| | - Hubert Ranchon
- CNRS, LAAS, 7 avenue
du colonel Roche, F-31400 Toulouse, France
- Universite de Toulouse, LAAS, F-31400 Toulouse, France
| | - Pascal Carrivain
- LPTMC UMR 7600, CNRS, Universite Pierre et Marie Curie-Paris 6, 4 place Jussieu, 75252 Paris Cedex 05, France
- CNRS GDR 3536, Universite Pierre et Marie Curie-Paris 6, 4 place Jussieu,
75252 Paris Cedex 05, France
| | - Yannick Viero
- CNRS, LAAS, 7 avenue
du colonel Roche, F-31400 Toulouse, France
- Universite de Toulouse, LAAS, F-31400 Toulouse, France
| | - Joris Lacroix
- CNRS, LAAS, 7 avenue
du colonel Roche, F-31400 Toulouse, France
- Universite de Toulouse, LAAS, F-31400 Toulouse, France
| | - Charline Blatché
- CNRS, LAAS, 7 avenue
du colonel Roche, F-31400 Toulouse, France
- Universite de Toulouse, LAAS, F-31400 Toulouse, France
| | - Emmanuelle Daran
- CNRS, LAAS, 7 avenue
du colonel Roche, F-31400 Toulouse, France
- Universite de Toulouse, LAAS, F-31400 Toulouse, France
| | - Jean-Marc Victor
- LPTMC UMR 7600, CNRS, Universite Pierre et Marie Curie-Paris 6, 4 place Jussieu, 75252 Paris Cedex 05, France
- CNRS GDR 3536, Universite Pierre et Marie Curie-Paris 6, 4 place Jussieu,
75252 Paris Cedex 05, France
| | - Aurélien Bancaud
- CNRS, LAAS, 7 avenue
du colonel Roche, F-31400 Toulouse, France
- Universite de Toulouse, LAAS, F-31400 Toulouse, France
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Barat D, Bardinal V, Dika I, Soppera O, Debernardi P, Rumyantseva A, Reig B, Renault M, Camps T, Bruyant A, Doucet JB, Malval JP, Daran E. Photo-chemical study and optical properties of microtips self- written on vertical laser diodes using NIR photo-polymerization. Opt Express 2012; 20:22922-22933. [PMID: 23037442 DOI: 10.1364/oe.20.022922] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Near infra-red (NIR) self-guided photo-polymerization is investigated in the context of micro-optics photo-fabrication on VCSELs (Vertical-Cavity Surface Emitting Lasers). We present the optimized process we have developed to allow for a collective fabrication on III-V devices wafers under real-time optical monitoring. The influence of photo-chemical parameters on final micro-elements dimensions is studied for two types of single mode 760 nm VCSELs. The difference of the resulting tip shape between the two lasers is due to the strong differences of their emissions, as they are nicely reproduced by the computed near-field profiles. The tip shapes are also compared to those produced by the light emitted by an optical fiber and differences with VCSEL tips are discussed. Also the VCSEL characteristics with fabricated tips are discussed and found in good agreement with optical modeling.
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Affiliation(s)
- D Barat
- CNRS, LAAS, 7 avenue du colonel Roche, F-31400 Toulouse, France
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Buet X, Daran E, Belharet D, Lozes-Dupuy F, Monmayrant A, Gauthier-Lafaye O. High angular tolerance and reflectivity with narrow bandwidth cavity-resonator-integrated guided-mode resonance filter. Opt Express 2012; 20:9322-9327. [PMID: 22513644 DOI: 10.1364/oe.20.009322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Guided mode resonance filters (GMRFs) are a promising new generation of reflective narrow band filters, that combine structural simplicity with high efficiency. However their intrinsic poor angular tolerance and huge area limit their use in real life applications. Cavity-resonator-integrated guided-mode resonance filters (CRIGFs) are a new class of reflective narrow band filters. They offer in theory narrow-band high-reflectivity with a much smaller footprint than GMRF. Here we demonstrate that for tightly focused incident beams adapted to the CRIGF size, we can obtain simultaneously high spectral selecitivity, high reflectivity, high angular acceptance with large alignment tolerances. We demonstrate experimentally reflectivity above 74%, angular acceptance greater than ±4.2° for a narrow-band (1.4 nm wide at 847 nm) CRIGF.
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Affiliation(s)
- X Buet
- CNRS, LAAS, 7 avenue du colonel Roche, F-31400 Toulouse, France
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Bardinal V, Camps T, Reig B, Debernardi P, Soppera O, Barat D, Doucet JB, Daran E. VCSEL beam control with collective and self-aligned polymer technologies. ACTA ACUST UNITED AC 2012. [DOI: 10.1117/12.910719] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Fehrembach AL, Gauthier-Lafaye O, Yu KCS, Monmayrant A, Bonnefont S, Daran E, Arguel P, Lozes-Dupuy F, Sentenac A. Measurement and modeling of 2D hexagonal resonant-grating filter performance. J Opt Soc Am A Opt Image Sci Vis 2010; 27:1535-1540. [PMID: 20596138 DOI: 10.1364/josaa.27.001535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We report the measurement of a polarization-independent guided-mode resonant filter with a Q factor of approximately 2200 functioning near normal incidence in the near infrared (850 nm). Besides this remarkable performance, we provide a detailed optical and structural characterization of the component, which points out the origins of the limitation of the experimental performance. We conclude that the defaults in question can be corrected by improving the lithography process, and we are confident that even greater performance will be obtained in future realizations.
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Affiliation(s)
- A-L Fehrembach
- Institut Fresnel, CNRS, Aix-Marseille Université, Ecole Centrale Marseille, Campus de St-Jérôme,13013 Marseille, France
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Bardinal V, Daran E, Leïchlé T, Vergnenègre C, Levallois C, Camps T, Conedera V, Doucet JB, Carcenac F, Ottevaere H, Thienpont H. Fabrication and characterization of microlens arrays using a cantilever-based spotter. Opt Express 2007; 15:6900-7. [PMID: 19547004 DOI: 10.1364/oe.15.006900] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
We present a quantitative study on the fabrication of microlenses using a low-cost polymer dispending technique. Our method is based on the use of a silicon micro-cantilever robotized spotter system. We first give a detailed description of the technique. In a second part, the fabricated microlenses are fully characterized by means of SEM (Scanning Electron Microscope), AFM (Atomic Force Microscopy) non contact optical profilometry and Mach-Zehnder interferometry. Diameters in the range [25-130mum] are obtained with an average surface roughness of 2.02nm. Curvature radii, focal lengths as well as aberrations are also measured for the first time: the fabricated microlenses present focal lengths in the range [55-181mum] and exhibit high optical quality only limited by diffraction behaviour with RMS aberration lower than lambda/14.
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Doualan J, Camy P, Moncorgé R, Daran E, Couchaud M, Ferrand B. Latest developments of bulk crystals and thin films of rare-earth doped CaF2 for laser applications. J Fluor Chem 2007. [DOI: 10.1016/j.jfluchem.2006.12.017] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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