{"id":97376,"date":"2019-01-24T00:23:43","date_gmt":"2019-01-24T00:23:43","guid":{"rendered":"https:\/\/\/des-chercheurs-rendent-possibles-des-composants-optoelectroniques-peu-couteux\/"},"modified":"2019-01-24T00:23:43","modified_gmt":"2019-01-24T00:23:43","slug":"des-chercheurs-rendent-possibles-des-composants-optoelectroniques-peu-couteux","status":"publish","type":"post","link":"https:\/\/www.ecinews.fr\/fr\/des-chercheurs-rendent-possibles-des-composants-optoelectroniques-peu-couteux\/","title":{"rendered":"Des chercheurs rendent possibles des composants opto\u00e9lectroniques peu co\u00fbteux"},"content":{"rendered":"<p>En coop\u00e9ration avec des partenaires chinois, des chercheurs de l&rsquo;Universit\u00e9 de M\u00fcnster (WWU) ont mis au point un nouveau concept de phototransistors mol\u00e9culaires permettant de convertir la lumi\u00e8re en signaux \u00e9lectriques avec une efficacit\u00e9 sans pr\u00e9c\u00e9dent.<\/p>\n<p>La conversion efficace de la lumi\u00e8re en signaux \u00e9lectriques est d\u2019une importance capitale pour l\u2019imagerie \u00e9lectronique, les technologies de communication optique et la technologie des capteurs biom\u00e9dicaux. Les phototransistors organiques (OFT) pr\u00e9sentent un int\u00e9r\u00eat pratique particulier pour le d\u00e9veloppement de composants \u00e9lectroniques flexibles et pliables. En plus de leur flexibilit\u00e9 m\u00e9canique, ils sont l\u00e9gers, peu co\u00fbteux et relativement faciles \u00e0 produire sur une grande surface.<\/p>\n<p>Gr\u00e2ce \u00e0 la modification cibl\u00e9e de la structure mol\u00e9culaire, les propri\u00e9t\u00e9s physiques peuvent \u00eatre ajust\u00e9es avec pr\u00e9cision sur une large plage. Les d\u00e9veloppements des OFT organiques connus \u00e0 ce jour ont toujours \u00e9t\u00e9 en retard sur ceux des syst\u00e8mes inorganiques ou hybrides en termes de performances. La principale raison en est la faible mobilit\u00e9 des porteurs de charge dans les mat\u00e9riaux organiques photosensibles.<\/p>\n<hr \/>\n<p>La nouvelle approche repose sur l\u2019utilisation de petites mol\u00e9cules au lieu de longues cha\u00eenes de polym\u00e8res. Ces mol\u00e9cules &#8211; le 2, 6- Diph\u00e9nyl-anthrac\u00e8ne (DPA), poss\u00e8dent une unit\u00e9 anthrac\u00e8ne fortement fluorescente sous forme de noyau semi-conducteur et de groupes ph\u00e9nyle, qui optimisent la mobilit\u00e9 des porteurs de charge et les propri\u00e9t\u00e9s opto\u00e9lectroniques. Les phototransistors ainsi r\u00e9alis\u00e9s, ne comportant aucune mol\u00e9cule, pr\u00e9sentent une photosensibilit\u00e9, une photo-r\u00e9activit\u00e9 et une d\u00e9tectivit\u00e9 \u00e9lev\u00e9es. \u00ab\u00a0Les valeurs obtenues d\u00e9passent celles de tous les autres OFT connus et font partie des meilleurs phototransistors existants \u00e0 ce jour, y compris inorganiques dans de nombreux domaines\u00a0\u00bb, explique le Dr Deyang Ji, qui a fabriqu\u00e9 les nouveaux phototransistors de l&rsquo;institut de physique de la WWU. Saeed Amirjalyer, responsable du groupe CeNTech, ajoute: \u00ab\u00a0En combinant les donn\u00e9es exp\u00e9rimentales avec des simulations, nous avons \u00e9t\u00e9 en mesure de comprendre quantitativement les donn\u00e9es de haute performance des phototransistors d\u00e9velopp\u00e9s. Cela permet une optimisation cibl\u00e9e dans le but d&rsquo;une commercialisation future.<\/p>\n<p>La s\u00e9lection appropri\u00e9e de mol\u00e9cules organiques et la recherche en physique fondamentale ont ainsi permis de jeter un pont important vers des applications technologiques dans le domaine de la technologie des capteurs ou de la transmission de donn\u00e9es. Les nano-physiciens rendent compte de leurs d\u00e9couvertes dans le dernier num\u00e9ro de la revue \u00ab\u00a0Nature Communications\u00a0\u00bb.<\/p>\n<p>&nbsp;<a href=\"https:\/\/www.uni-muenster.de\/Physik.PI\/en\/Institut\/index.html\">Institute of Physics at WWU&nbsp;<\/a><\/p>\n<p><a href=\"https:\/\/www.centech.de\/\">CeNTech<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Des chercheurs de l&rsquo;Universit\u00e9 de M\u00fcnster en Allemagne ont r\u00e9ussi \u00e0 franchir une \u00e9tape majeure dans la mise au point de transistors photo tr\u00e8s efficaces et peu co\u00fbteux. Les scientifiques ont pu am\u00e9liorer consid\u00e9rablement l&rsquo;efficacit\u00e9 des phototransistors mol\u00e9culaires dans la conversion de la lumi\u00e8re en signaux \u00e9lectriques.<\/p>\n","protected":false},"author":11,"featured_media":97377,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[883],"tags":[],"domains":[47],"ppma_author":[1143],"class_list":["post-97376","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologies","domains-electronique-eci"],"acf":[],"yoast_head":"<title>Des chercheurs rendent possibles des composants opto\u00e9lectroniq...<\/title>\n<meta name=\"description\" content=\"Des chercheurs de l&#039;Universit\u00e9 de M\u00fcnster en Allemagne ont r\u00e9ussi \u00e0 franchir une \u00e9tape majeure dans la mise au point de transistors photo tr\u00e8s...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/97376\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Des chercheurs rendent possibles des composants opto\u00e9lectroniques peu co\u00fbteux\" \/>\n<meta property=\"og:description\" content=\"Des chercheurs de l&#039;Universit\u00e9 de M\u00fcnster en Allemagne ont r\u00e9ussi \u00e0 franchir une \u00e9tape majeure dans la mise au point de transistors photo tr\u00e8s efficaces et peu co\u00fbteux. Les scientifiques ont pu am\u00e9liorer consid\u00e9rablement l&#039;efficacit\u00e9 des phototransistors mol\u00e9culaires dans la conversion de la lumi\u00e8re en signaux \u00e9lectriques.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.ecinews.fr\/fr\/wp-json\/wp\/v2\/posts\/97376\/\" \/>\n<meta property=\"og:site_name\" content=\"EENewsEurope\" \/>\n<meta property=\"article:published_time\" content=\"2019-01-24T00:23:43+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.ecinews.fr\/wp-content\/uploads\/import\/default\/files\/sites\/default\/files\/images\/universite_de_munster.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"424\" \/>\n\t<meta property=\"og:image:height\" content=\"283\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Daniel Cardon\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta 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