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Organic Electronics

The use of organic conducting materials in electronic applications offers a more eco-friendly and less expensive solution for energy management. Organic small molecules and polymers offers unique properties to electronic devices for light harvesting applications or conversion of electrical energy into light (OLED). Over the last decade, Materia Nova has become more refined in this domain. Nowadays, our activities extend from molecular design of materials to devices fabrication, through molecules and polymers synthesis.

Applications

  • Organic Light Emitting Diode : OLED and hybrid devices (HYLED) based on a rigid (glass, metal) or flexible (plastic, textile) transparent or opaque substrates.  

  • Thin-film Photovoltaics : Third generation PVs include Dye-Sensitized Solar Cells (DSSC), Organic Solar Cells (OPV), and perovskite PV  

  • Surface functionnalization  for tailoring the physico-chemical properties of solid surfaces

  • Patterned, Transparent and Flexible electrodes 

  • Barrier films and thin films encapsulation (Atomic Layer Deposition)
  • Expertises

  • Mutliscale modeling of materials and processes : Materials Design and modeling, modeling energy and charge transport,  modeling interface processes and transport in molecular junctions (in close collaboration with the Laboratory for Chemistry of Novel Materials)

  • The processing of new materials (polymers, small organic molecules, inorganic semiconductors) as thin films, using solution-processing methods, vacuum evaporation processes or a combination of the two approaches. 

  • The characterization of the microscopic morphology, the optical, electrical and transport properties of thin films. 

  • The complete fabrication of optoelectronic devices (Organic Light Emitting Diodes- OLED’s and Organic Photovoltaics -OPV) consisting of full-evaporated or (partially) solution-processed stacks, both in ambient and glovebox conditions. 

  • The design of optimized device architectures consisting of organic and hybrid stacks through the control of the constitutive layers, control of the matching between the active(s) layer(s), the electron/hole transport and injection layers), optimization of the interfaces in terms of charge balance (p-i-n architectures) and control of the processability. 

  • The optimization/validation of fabrication protocols on new types of substrates: transparent (glass,plastics..), opaque (metal, paper), rigid or flexible, 3D (textiles) for new applications (off-grid, portable or building-integrated applications), optimization of the process for bottom- or top-emitting/harvesting devices. 

  • Study of the ageing processes for bulk heterojunction solar cells. 

  • Strategies towards Indium-free and new solution-processable electrodes. 

  • Encapsulation of the devices for their protection against air and water. 

  • The characterization of the device performances. (1) Oled’s: Current efficiency (Cd/A), power efficiency (lm/Watt), luminance (Cd/m2), spectral properties, Color Rendering Indexes. (2) Performances of Organic Solar cells: Open-circuit Voltage (Voc), Short-circuit Current (Jsc), Fill Factor (FF), Power Conversion efficiency (PCE) under illumination (solar simulator). 
  • Team

    Pascal Viville
    Scientific Leader

    Publications / Patents

    [1]  Chemical and physical effects of the carrier gas on the atmospheric pressure PECVD of fluorinated precursors, Hubert, J., Vandencasteele, N., Mertens, J., Viville, P., Dufour, T., Barroo, C., Visart de Bocarmé, T., Lazzaroni, R., Reniers, F. Plasma Processes and Polymers, (2015)

    [2] Towards a Unified Description of the Charge Transport Mechanisms in Conductive Atomic Force Microscopy Studies of Semiconducting Polymers, D. Moerman, N. Sebaihi, S.E. Kaviyil, P. Leclère, R. Lazzaroni, and O. Douhéret. Nanoscale 6 (2014) 10596-10603.

    [3] Multiscale Modelling of Organic and Hybrid Photovoltaics”, edited by D. Beljonne and J. Cornil, Topics in Current Chemistry, Vol. 352 (Springer, 2014), 400 pages.

    [4] Ageing of organic photovoltaic devices in Benin environment (South-Sudanese climate), M. Agbomahena et al.  Solar Energy Materials and Solar Cells, 117, 2013, 93–97.

    [5] Macrocyclic regioregular poly(3-hexylthiophene): from controlled synthesis to nanotubular assemblies; O. Coulembier, G. Deshayes, M. Surin, J. De Winter, F. Boon, C. Delcourt, Ph. Leclère, R. Lazzaroni, Ph. Dubois; Polym. Chem., 4 (2013) 237-241.

    [6] OLED Light Extraction Improvement with Surface Nano-micro Texturation Based on Speckle Lithography, Loicq, J.; Fleury-Frenette, K.; Viville, P.; Lazzaroni, R.; Kanaan, H.; Guaino., P. in “Physics and Optics of OLEDs“, SPIE Photonics Europe 2012.

    [7] Large white organic light-emitting diode lighting panel on metal foils”, Ph. Guaino et al. Journal of Photonics for Energy, Vol. 1, 2011, 0110151 – 0110158.

    [8] Efficient bulk heterojunction photovoltaic cells with a pre-organized poly(3-hexylthiophene) phase”, D. Moerman et al., APPLIED PHYSICS LETTERS 99, 093303 (2011).

    [9] Substrate-Induced Crystal Plastic Phase of a Discotic Liquid Crystal, Gbabode, G.; Dumont, N.; Quist, F.; Schweicher, G.; Moser, A.; Viville, P.; Lazzaroni, R.; Geerts, Y. H. Adv. Mater. 2012, 24, 658-662.

    [10] Nanoscale investigation of the electrical properties in semiconductor polymer/carbon nanotube hybrid materials, S. Desbief, N Hergué , O. Douhéret , M. Surin , Ph. Dubois, Y. Geerts, R. Lazzaroni, Ph. Leclère; Nanoscale, 4 (2012) 2705-2712.

    [11] Novel regioregular poly(3-hexylthiophene)-based polycationic block copolymers, H. Tran Nguyen, O. Coulembier, K. Gheysen, J.C. Martins, Ph. Dubois; Macromolecules, 45 (2012) 9547–9550.

    [12] Synthesis of fluorine doped zinc oxide by reactive magnetron sputtering, X. Noirfalise, T. Godfroid, G. Guisbiers, R. Snyders, Acta Materialia 59 (2011) 7521

    [13] Solid-State Supramolecular Organization of Polythiophene Chains Containing Thienothiophene Units, P. Brocorens, A. Van Vooren, M.L. Chabinyc, M.F. Toney, M. Shkunov, M. Heeney, I. McCulloch, J. Cornil, R. Lazzaroni; Advanced Materials, 21 (2009) 1193-1198.