{"id":32430,"date":"2013-04-01T13:35:16","date_gmt":"2013-04-01T10:35:16","guid":{"rendered":"http:\/\/www.fyysika.ee\/uudised\/?p=32430"},"modified":"2013-04-01T13:38:22","modified_gmt":"2013-04-01T10:38:22","slug":"nanotraatidega-kaetud-paiksepaneel","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=32430","title":{"rendered":"Nanotraatidega kaetud p\u00e4iksepaneel"},"content":{"rendered":"<p><strong>Taani Niels Bohri Instituudi Nanoteaduse keskuse ning \u0160veitsi Lausanne\u2019i <em>Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne<\/em> f\u00fc\u00fcsikud n\u00e4itasid, et \u00fcksik nanotraat v\u00f5ib p\u00e4ikesevalguse vihku kuni 15 korda tihedamaks fookustada. \u00dcllatavate, teadusajakirjas <em>Nature Photonics<\/em> ilmunud tulemuste valguses on k\u00e4iku l\u00fckatud uue p\u00f5lvkonna p\u00e4ikesepaneeli arendamine.<\/strong><\/p>\n<div id=\"attachment_32433\" style=\"width: 360px\" class=\"wp-caption alignleft\"><a href=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2013\/04\/nanowiresola.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-32433\" class=\"size-full wp-image-32433 \" src=\"http:\/\/www.fyysika.ee\/uudised\/wp-content\/uploads\/2013\/04\/nanowiresola.jpg\" alt=\"\" width=\"350\" height=\"171\" srcset=\"https:\/\/www.fyysika.ee\/wp-content\/uploads\/2013\/04\/nanowiresola.jpg 500w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2013\/04\/nanowiresola-300x146.jpg 300w, https:\/\/www.fyysika.ee\/wp-content\/uploads\/2013\/04\/nanowiresola-250x122.jpg 250w\" sizes=\"auto, (max-width: 350px) 100vw, 350px\" \/><\/a><p id=\"caption-attachment-32433\" class=\"wp-caption-text\">Nanotraat-kristallidest p\u00e4ikesepaneel. Vasakul on skanneeriva-elektronmikroskoobi pilt r\u00e4nisubstraadile kasvatatud GaAs (galliumarseniid) kristallstruktuurist. Keskmine, \u00fcksikut paneeliharjast kujutav pilt tehti l\u00e4bivalgustava-elektronmikroskoopiaga. Skanneeriv-l\u00e4bivalgustava-elektronmikroskoopia s\u00fcvapilt, paremal, (STEM, Scanning Transmission Electron Microscope) n\u00e4itab krstialli aatomstruktuuri.<\/p><\/div>\n<p>Kopenhaageni \u00dclikooli Niels Bohri Instituudi PhD Peter Krogstrup on viimastel aastatel oma t\u00f6\u00f6r\u00fchma t\u00e4helepanu keskendanud nanotraat-kristallide h\u00f5lpsamale ning kvaliteetsemale valmistamisele. Silinderjas nanotraat on inimese juuksekarvast keskeltl\u00e4bi 10000 korda peenem. Need pisitraadid on lisaks p\u00e4ikesepaneelidele ning laialdastele elektroonikarakendustele tunginud kvantarvutitegi maailma.<\/p>\n<p>\u201eOsutub, et nanotraadid on head optilised l\u00e4\u00e4tsed. Nanotraadi kristall saab interakteeruda valgusega, mille lainepikkus on traadi l\u00e4bim\u00f5\u00f5dust v\u00e4iksem. See t\u00e4hendab, et traadi \u00fcmber ja sees saab tekitada valguse resonantsi. Resonants koondab valguse paneeli piirkonda, milles on v\u00f5imalik senisest k\u00f5rgema efektiivsusega valgust elektriks muundada,\u201c selgitas Krogstrup.<\/p>\n<p>\u00dchekordse siirde ja 1,34 eV laiuse keelutsooniga pooljuhtpaneeli teoreetiline <em>Shockle-Queisser<\/em> efektiivsuspiir on 33,7 %. L\u00f5pmatu-kordse siirde efektiivsuspiir on 86 %. Nanotraatidega saab aga esimest, \u00fchekordse siirde efektiivsuspiiri \u00fcletada.<\/p>\n<p>\u201eTeaduse teoreetilisi piire on p\u00f5nev nihutada. Efektiivsuse t\u00f5stmine paari protsendi v\u00f5rra ei k\u00f5la k\u00fcll m\u00e4rkimisv\u00e4\u00e4rselt, ent p\u00e4ikesepaneelide arengus on see v\u00e4ga suur samm. Nanotraatidest p\u00e4ikesepaneele tootmiseni l\u00e4heb veel m\u00f5ned aastad aega,\u201c \u00fctles Krogstrup.<\/p>\n<p>Allikas: <a href=\"http:\/\/phys.org\/news\/2013-03-nanowire-solar-cells-efficiency-limit.html\">Phys.org<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Taani Niels Bohri Instituudi Nanoteaduse keskuse ning \u0160veitsi Lausanne\u2019i Ecole Polytechnique F\u00e9d\u00e9rale de Lausanne f\u00fc\u00fcsikud n\u00e4itasid, et \u00fcksik nanotraat v\u00f5ib p\u00e4ikesevalguse vihku kuni 15 korda tihedamaks fookustada. \u00dcllatavate, teadusajakirjas Nature Photonics ilmunud tulemuste valguses on k\u00e4iku l\u00fckatud uue p\u00f5lvkonna p\u00e4ikesepaneeli arendamine. Kopenhaageni \u00dclikooli Niels Bohri Instituudi PhD Peter Krogstrup on viimastel aastatel oma t\u00f6\u00f6r\u00fchma t\u00e4helepanu [&hellip;]<\/p>\n","protected":false},"author":449,"featured_media":32433,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[16],"tags":[147],"class_list":{"0":"post-32430","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-teadusuudis","8":"tag-nanotehnoloogia","9":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/32430","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/users\/449"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=32430"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/32430\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/media\/32433"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=32430"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=32430"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=32430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}