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URL:https://murmitoyen.com/events/vanille/udem/detail/246876
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:Solution processed inorganic/organic photonic structures of low los
 s  and tunable refractive index for use in optoelectronic devices
DESCRIPTION:Natalie Stingelin\, Reader in Functional Organic Materials\, De
 partment of MaterialsImperial College London\, Exhibition Road\, London\
 , SW7 2AZ\, UKAn ever increasing interest in the development and applicat
 ion of innovative optical and optoelectronic devices places greater emphas
 is for the advancement of new smart and functional materials that are read
 ily processable. Significant progress has already been realised in the fie
 lds of organic light-emitting diodes (OLEDs) and photovoltaic cells (OPVs)
  through development of novel semiconducting materials. Further developmen
 ts in these areas are turning to the deployment of photonic structures to 
 aid and improve light management in these systems\, e.g. input-/output-cou
 pling\, enhanced absorption and waveguiding. In this work\, results from a
  novel class of hybrid material systems that offer an outstanding set of o
 ptical and material properties\, including tunable refractive index\, low 
 optical losses and solution process ability\, are presented. We show that 
 the attributes of these novel hybrid material systems can be controlled an
 d manipulated by a range of means that include ‘alloying’ or suitable 
 post-deposition treatments\, such as thermal annealing and/or irradiation 
 with UV-light. As a consequence\, these hybrid materials can exhibit refra
 ctive indices of up to 2.1 while also being highly transparent over the en
 tire visible\, near- and mid- infrared (N-IR\, M-IR) wavelength regime [1]
 . Furthermore\, the processing properties allow the realisation of solutio
 n-based\, optically low-loss photonic structures that are straightforward 
 to implement in structures\, such as OPVs. Given that the readily achievab
 le nature of high quality optical properties and the exceptionally low los
 s from a single high-index up to several microns thick have already been d
 emonstrated\, the focus is here turned to the further development of this 
 generic class of hybrid materials\, which are based on metal oxide hydrate
 s and bulk commodity polymers such as poly(vinyl alcohol). To this end\, w
 e highlight our recent efforts in introducing different metals\, culminati
 ng in the successful development of mixed-metal oxide hydrate hybrid mater
 ials.[1] M. Russo et al.\, J. Polym. Sci.\, Part B: Polym. Phys. 50(1)\, 6
 5\, (2011).In collaboration with Irene Votta\,1\,2 Andrew Strang\,1\,2 
 George Richardson\,2\,3 Manuela Russo\,2\,3 Walter Caseri\,4 Donal Brad
 ley\,1\,2 and Paul Stavrinou1\,2 Department of Physics\, Blackett Labora
 tory\, Imperial College London\, London\, SW7 2AZ\,UKCentre for Plastic E
 lectronics\, Imperial College London\, London\, SW7 2AZ\, UKDepartment of 
 Materials\, Imperial College London\, London\, SW7 2AZ\, UKDepartment of M
 aterials\, ETH Zurich\, CH-8093 Zürich\, SwitzerlandSite web du groupe de
   Prof. StingelinCette conférence est présentée par le RQMP Versant Nor
 d du Département de physique de l'Université de Montréal et le Départ
 ement de génie physique de Polytechnique Montréal.
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