{"id":37118,"date":"2019-06-18T09:28:46","date_gmt":"2019-06-18T07:28:46","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=37118"},"modified":"2019-07-04T09:56:05","modified_gmt":"2019-07-04T07:56:05","slug":"soutenance-de-these-thierno-moussa-bah-developpement-caracterisation-dun-demonstrateur-de-generateur-thermoelectrique-a-base-de-membranes-de-silicium-couplees-a-de-lingenierie-phononique","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/actualites\/soutenance-de-these-thierno-moussa-bah-developpement-caracterisation-dun-demonstrateur-de-generateur-thermoelectrique-a-base-de-membranes-de-silicium-couplees-a-de-lingenierie-phononique.html","title":{"rendered":"Soutenance de Th\u00e8se : Thierno Moussa BAH \u2013 D\u00e9veloppement &amp; caract\u00e9risation d\u2019un d\u00e9monstrateur de g\u00e9n\u00e9rateur thermo\u00e9lectrique \u00e0 base de membranes de silicium coupl\u00e9es \u00e0 de l\u2019ing\u00e9nierie phononique"},"content":{"rendered":"<div id='layer_slider_1'  class='avia-layerslider main_color avia-shadow  avia-builder-el-0  el_before_av_heading  avia-builder-el-first  container_wrap sidebar_right'  style='height: 261px;'  ><div id=\"layerslider_58_sahta8rqk6ab\" data-ls-slug=\"homepageslider\" class=\"ls-wp-container fitvidsignore ls-selectable\" style=\"width:1140px;height:260px;margin:0 auto;margin-bottom: 0px;\"><div class=\"ls-slide\" data-ls=\"duration:6000;transition2d:5;\"><img loading=\"lazy\" decoding=\"async\" width=\"2600\" height=\"270\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg\" class=\"ls-bg\" alt=\"\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1.jpg 2600w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-300x31.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-768x80.jpg 768w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1030x107.jpg 1030w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-1500x156.jpg 1500w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2019\/01\/sliders_news1-705x73.jpg 705w\" sizes=\"auto, (max-width: 2600px) 100vw, 2600px\" \/><ls-layer style=\"font-size:14px;text-align:left;font-style:normal;text-decoration:none;text-transform:none;font-weight:700;letter-spacing:0px;border-style:solid;border-color:#000;background-position:0% 0%;background-repeat:no-repeat;width:180px;height:30px;left:0px;top:231px;line-height:32px;color:#ffffff;border-radius:6px 6px 6px 6px;padding-left:50px;background-color:rgba(0, 0, 0, 0.57);\" class=\"ls-l ls-ib-icon ls-text-layer\" data-ls=\"minfontsize:0;minmobilefontsize:0;\"><i class=\"fa fa-quote-right\" style=\"color:#ffffff;margin-right:0.8em;font-size:1em;transform:translateY( -0.125em );\"><\/i>ACTUALITES<\/ls-layer><\/div><\/div><\/div><div id='after_layer_slider_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-37118'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jx1gi7cx-3ac0be4de80e2d8975ece55686235084\">\n#top .av-special-heading.av-jx1gi7cx-3ac0be4de80e2d8975ece55686235084{\nmargin:0 0 10px 0;\npadding-bottom:4px;\n}\nbody .av-special-heading.av-jx1gi7cx-3ac0be4de80e2d8975ece55686235084 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-jx1gi7cx-3ac0be4de80e2d8975ece55686235084 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-jx1gi7cx-3ac0be4de80e2d8975ece55686235084 av-special-heading-h2  avia-builder-el-1  el_after_av_layerslider  el_before_av_hr  avia-builder-el-first'><h2 class='av-special-heading-tag'  itemprop=\"headline\"  >THESIS: Development <span class='special_amp'>&amp;<\/span> characterisation of a thermoelectric generator demonstrator based on silicon membranes coupled with acoustic engineering <\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-18u73nj-dad6a947580930e400fc42ba200e80f1\">\n#top .hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1{\nmargin-top:5px;\nmargin-bottom:5px;\n}\n.hr.av-18u73nj-dad6a947580930e400fc42ba200e80f1 .hr-inner{\nwidth:100%;\n}\n<\/style>\n<div  class='hr av-18u73nj-dad6a947580930e400fc42ba200e80f1 hr-custom  avia-builder-el-2  el_after_av_heading  el_before_av_textblock  hr-left hr-icon-no'><span class='hr-inner inner-border-av-border-thin'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<section  class='av_textblock_section av-jriy64i8-2f4600354c0449b610997916bbd9b6bc'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" >\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-13ewzjw-68e036126b913e5028f77311dc66b825\">\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825{\ncolor:#bfbfbf;\nborder-color:#bfbfbf;\n}\n.av_font_icon.av-13ewzjw-68e036126b913e5028f77311dc66b825 .av-icon-char{\nfont-size:60px;\nline-height:60px;\n}\n<\/style>\n<span  class='av_font_icon av-13ewzjw-68e036126b913e5028f77311dc66b825 avia_animate_when_visible av-icon-style- avia-icon-pos-left avia-icon-animate'><span class='av-icon-char' aria-hidden='true' data-av_icon='\ue8c9' data-av_iconfont='entypo-fontello' ><\/span><\/span>\n<h5><strong style=\"font-size: 16px;\">Thierno Moussa BAH<\/strong><\/h5>\n<p><strong>Tuesday 3 July 2019 at 10.00 am<br \/>\n<\/strong>IEMN Amphitheatre, Central Laboratory - Villeneuve d'Ascq<\/p>\n<\/div><\/section>\n<section  class='av_textblock_section av-jtefqx33-628129dba2299b2ecd65ebfc92eac29d'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><div  class='hr av-kjh3zw-4dff888f744b728a1aca9b3a0971493a hr-default  avia-builder-el-6  avia-builder-el-no-sibling'><span class='hr-inner'><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<h5><strong><span style=\"color: #800000;\">Jury:<\/span><\/strong><\/h5>\n<ul>\n<li>Emmanuel DUBOIS, Director of Research, University of Lille (Thesis supervisor)<\/li>\n<li>Thomas SKOTNICKI, Professor, Cezamat Warsaw (Thesis co-supervisor)<\/li>\n<li>Jean-Fran\u00e7ois ROBILLARD, Senior Lecturer, IEMN Lille &amp; ISEN Lille (Examiner)<\/li>\n<li>Stephane MONFRAY, Research Engineer, STMicroelectronics Crolles (Examiner)<\/li>\n<li>Olivier BOURGEOIS, Director of Research, Institut N\u00e9el Grenoble (Rapporteur)<\/li>\n<li>Sylvie HEBERT, Research Director, CRISMAT Caen (Rapporteur)<\/li>\n<li>Edith KUSSENER, Senior Lecturer, IM2NP &amp; ISEN Toulon (Examiner)<\/li>\n<li>Guillaume SAVELLI, Research Engineer, CEA Grenoble (Examiner)<\/li>\n<\/ul>\n<h5>Summary:<\/h5>\n<p>The rise of the Internet of Things (IoT) and autonomous, communicating sensors appears to be delayed due to the lack of a reliable, secure and low-cost energy source [Nordrum 2016]. Thermoelectric energy harvesters offer these key advantages. Silicon has the advantages of being highly abundant, less environmentally polluting and having the technological facilities and processes to enable mass production of thermoelectric energy harvesters at low cost compared to conventional materials (bismuth tellurium alloys). However, silicon is a poor thermoelectric material due to its high thermal conductivity (150Wm^(-1) K^(-1)) [Haras et al. 2015]. The ability to reduce thermal conductivity while preserving electrical conductivity and Seebeck coefficient is the key to improving silicon as an efficient thermoelectric material. To this end, efforts are directed towards the phononic part of heat transport, which is the dominant contribution in semiconductors [Jin 2014].<\/p>\n<p>The research carried out during this thesis focused on the integration of nanostructured silicon membranes of phononic arrays [Haras 2016; Lacatena et al. 2014; Tang et al. 2010; Yu et al. 2010] in thermoelectric energy recovery demonstrators and their characterisation with respect to the state of the art. The results of these studies demonstrated the feasibility of a silicon-based thermoelectric energy recuperator with sufficient performance to supply energy to autonomous sensor nodes [Vullers et al. 2009] and performance comparable to that of a state-of-the-art recuperator based on bismuth tellurium [Bottner 2005], depending on the cooling conditions of the latter. In addition to energy recovery, this thesis has demonstrated the possibility of developing silicon-based thermoelectric coolers, paving the way for the possible integration of thermoelectric coolers into silicon-based microelectronic devices.<\/p>\n<h5>Abstract:<\/h5>\n<p>The blooming of the internet of things (IoT) and wireless sensors nodes seems to be delayed owing to the lack of reliable, safe and low-cost source [Nordrum 2016]. Thermoelectric harvesters feature those key advantages. Silicon presents the advantages to be most abundant, environmental less harmful and to benefit from facilities and technological processes for low cost thermoelectric harvesters mass production compared to the conventional materials (bismuth telluride alloys). However, silicon is a poor thermoelectric material due to its high thermal conductivity (150Wm^(-1) K^(-1)) [Haras et al. 2015]. The possibility to reduce the thermal conductivity while preserving electrical conductivity and Seebeck coefficient is the key to upgrade silicon as an efficient thermoelectric material. To that end, efforts are oriented towards the phononic part of heat transport, which is the dominant contribution in semiconductors [Jin 2014]. The researches carried out during this thesis dealt with the integration phonon engineered silicon membranes [Haras 2016; Lacatena et al. 2014; Tang et al. 2010; Yu et al. 2010] into thermoelectric harvester demonstrators and their characterizations with respect to the state of the art.<\/p>\n<p>The studies' results demonstrated the feasibility of a silicon based thermoelectric harvester exhibiting performances sufficient for autonomous sensor nodes' power supplying [Vullers et al. 2009] and comparable performances with the bismuth telluride state of the art harvester [Bottner 2005] according to the harvesters' cooling conditions. Moreover, this thesis demonstrated in addition to the energy harvesting, the possibility of developing silicon based thermoelectric coolers, opening the way to possible integration of thermoelectric coolers in silicon based micro-electronic devices.<\/p>\n<\/div><\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":37120,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[234,237,235,231,229,230,232,233],"class_list":["post-37118","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","tag-energies","tag-energy","tag-engineering","tag-phononic","tag-phononique","tag-silicium","tag-silicon","tag-thermoelectricity"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/37118","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=37118"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/37118\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media\/37120"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=37118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=37118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=37118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}