{"id":3911,"date":"2012-01-02T09:00:14","date_gmt":"2012-01-02T15:00:14","guid":{"rendered":"http:\/\/stateimpact.npr.org\/texas\/?p=3911"},"modified":"2013-11-15T20:34:56","modified_gmt":"2013-11-16T02:34:56","slug":"texas-professor-has-bright-ideas-for-solar-power","status":"publish","type":"post","link":"https:\/\/stateimpact.npr.org\/texas\/2012\/01\/02\/texas-professor-has-bright-ideas-for-solar-power\/","title":{"rendered":"Texas Professor Has Bright Ideas for Solar Power"},"content":{"rendered":"<div id=\"attachment_3912\"  class=\"wp-caption module image right\" style=\"max-width: 300px;\"><a class=\"fancybox\" title=\"Xiaoyang Zhu of the University of Texas has made a surprising breakthrough in solar power.\" href=\"http:\/\/stateimpact.npr.org\/texas\/files\/2011\/12\/photo.jpg\" rel=\"\"><img decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-3912\" title=\"photo\" alt=\"\" src=\"http:\/\/stateimpact.npr.org\/texas\/files\/2011\/12\/photo-300x224.jpg\" width=\"300\" height=\"224\" srcset=\"https:\/\/stateimpact.npr.org\/texas\/files\/2011\/12\/photo-300x224.jpg 300w, https:\/\/stateimpact.npr.org\/texas\/files\/2011\/12\/photo-620x463.jpg 620w, https:\/\/stateimpact.npr.org\/texas\/files\/2011\/12\/photo-220x164.jpg 220w, https:\/\/stateimpact.npr.org\/texas\/files\/2011\/12\/photo-138x103.jpg 138w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><p class=\"wp-media-credit\">Photo by Mose Buchele\/StateImpact Texas<\/p><p class=\"wp-caption-text\">Xiaoyang Zhu of the University of Texas has made a surprising breakthrough in solar power.<\/p><\/div>\n<p>By almost any measure, 2011 was a r<a href=\"http:\/\/online.wsj.com\/article\/SB10001424052970204552304577117140511996840.html\">ough year for solar power in the U.S.<\/a> Federal subsidies to Solyndra became the<a href=\"http:\/\/www.washingtonpost.com\/wp-srv\/special\/politics\/solyndra-scandal-timeline\/\"> focus of a congressional investigation<\/a> after the company went bankrupt. Other solar outfits are feeling pressure on two fronts: low-cost Chinese-manufactured panels are <a href=\"http:\/\/www.huffingtonpost.com\/2011\/12\/20\/china-solar-subsidy-american-manufacturing_n_1160657.html\">driving prices down around the world<\/a>, and electricity from America\u2019s newly unleashed natural gas reserves is <a href=\"http:\/\/stateimpact.npr.org\/texas\/2011\/11\/28\/abundant-natural-gas-spells-trouble-for-renewables\/\">making power from renewable sources seem less economical<\/a>.<\/p>\n<p>But at the end of the year, a scientist in Austin has brought a little sun into the forecast. Meet\u00a0<a href=\"http:\/\/www.cm.utexas.edu\/xiaoyang_zhu\">Xiaoyang Zhu<\/a>, a chemistry professor at the University of Texas, and director of the Energy Frontier Research Center.<\/p>\n\n<p>For the last few years Zhu and his team have been working on a way to dramatically increase the amount of energy harvested from Solar technology. Now, they think they\u2019ve done it. \u00a0<!--more--><\/p>\n<p>\u201cSo our recent discovery is this. If you have a light photon,&#8221; he says to me, then pauses. &#8220;I guess this concept is simple enough, yea?\u201d<\/p>\n<div class=\"related-content alignleft\"><h4 class=\"related-header\">Related<\/h4><div class=\"links\"><h5>Posts<\/h5><ul><li class=\"link\"><a href=\"http:\/\/stateimpact.npr.org\/texas\/2011\/12\/06\/would-you-like-some-solar-with-your-swedish-meatballs\/\">Would You Like Some Solar With Your Swedish Meatballs?<\/a><\/li><li class=\"link\"><a href=\"http:\/\/stateimpact.npr.org\/texas\/2011\/11\/11\/does-the-keystone-pipeline-delay-actually-hurt-green-energy\/\">Does the Keystone Pipeline Delay Actually Hurt Green Energy?<\/a><\/li><li class=\"link\"><a href=\"http:\/\/stateimpact.npr.org\/texas\/2011\/11\/02\/why-so-few-solar-farms-in-texas\/\">Why So Few Solar Farms in\u00a0Texas?<\/a><\/li><li class=\"link\"><a href=\"http:\/\/stateimpact.npr.org\/texas\/2011\/10\/20\/how-to-avoid-another-solyndra\/\">How to Avoid Another Solyndra<\/a><\/li><\/ul><\/div><div class=\"topics\"><h5>Topics<\/h5><p class=\"topic\"><img class=\"alignleft\" src=\"http:\/\/stateimpact.npr.org\/texas\/files\/2011\/09\/Texas_Renewable_Energy-60x60.jpg\" height=\"60\" width=\"60\" \/><a href=\"http:\/\/stateimpact.npr.org\/texas\/topic\/texas-renewable-energy-targets\/\">What Are The Texas Renewable Energy Targets?<\/a><\/p><p class=\"topic\"><img class=\"alignleft\" src=\"http:\/\/stateimpact.npr.org\/texas\/files\/2011\/08\/Solar-Energy-Power-by-Daniel-Reese-01-60x60.jpg\" height=\"60\" width=\"60\" \/><a href=\"http:\/\/stateimpact.npr.org\/texas\/topic\/texas-solar-power\/\">Texas Solar\u00a0Power<\/a><\/p><\/div><\/div>\n<p>Well, maybe not for many of us. Here\u2019s a little background. Solar panels <a href=\"http:\/\/science.howstuffworks.com\/environmental\/energy\/solar-cell.htm\">capture energy from light photons<\/a>. But when the photon is too hot, with energy too high, traditional techniques only capture part of it. Most of the light converts to heat. Zhu\u2019s team has found away to absorb those photons into a plastic. To put them in what scientists call a \u201cdark state.\u201d<\/p>\n<p>\u201cIn this dark state, this one electron hole pair becomes two electrons hole pair,&#8221; Zhu says. &#8220;Of course it\u2019s very difficult to describe in common language. You hear about this thing called quantum weirdness?\u201d<\/p>\n<p>Again, I shake my head no.<\/p>\n<p>It took some explaining \u2013 but here\u2019s the upshot: \u00a0In this \u201cdark state\u201d Zhu was actually able to harvest two electrons of energy from one hot photon.<\/p>\n<p>\u201cSo, the conventional Solar panel. That efficiency theoretically is 31 percent. With our discovery the theoretical efficiency increases to 44 percent.\u201d<\/p>\n<p>That\u2019s a more than 40 percent increase in the amount of energy that can be produced from a solar panel. But you can\u2019t do it with traditional silicone photovoltaic cells. Remember, I said Zhu\u2019s team has been using plastic to capture the energy.<\/p>\n<div id=\"attachment_124\"  class=\"wp-caption module image right\" style=\"max-width: 300px;\"><a class=\"fancybox\" title=\"Solar Energy Panels in Austin, Texas.\" href=\"http:\/\/stateimpact.npr.org\/texas\/files\/2011\/08\/Solar-Energy-Power-by-Daniel-Reese-01.jpg\" rel=\"\"><img decoding=\"async\" loading=\"lazy\" class=\"size-medium wp-image-124\" title=\"Solar Energy Power - by Daniel Reese - 01\" alt=\"\" src=\"http:\/\/stateimpact.npr.org\/texas\/files\/2011\/08\/Solar-Energy-Power-by-Daniel-Reese-01-300x200.jpg\" width=\"300\" height=\"200\" srcset=\"https:\/\/stateimpact.npr.org\/texas\/files\/2011\/08\/Solar-Energy-Power-by-Daniel-Reese-01-300x200.jpg 300w, https:\/\/stateimpact.npr.org\/texas\/files\/2011\/08\/Solar-Energy-Power-by-Daniel-Reese-01-220x146.jpg 220w, https:\/\/stateimpact.npr.org\/texas\/files\/2011\/08\/Solar-Energy-Power-by-Daniel-Reese-01.jpg 580w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><p class=\"wp-media-credit\">Photo by Daniel Reese for KUT News.<\/p><p class=\"wp-caption-text\">Solar Energy Panels in Austin, Texas.<\/p><\/div>\n<p>&#8220;The advantage of course, is obvious when I say plastic,&#8221; he says. &#8220;It\u2019s cheap.\u201d<\/p>\n<p>Engineering the new plastic semiconductor solar cells to the point that they could be commercially viable is Zhu\u2019s next challenge.\u00a0\u201cA friend of mine at MIT, a group at MIT is actually trying to do that,&#8221; he says. &#8220;And the efficiency is not there yet.\u201d<\/p>\n<p>But he\u2019s confident that within a few years, solar cells that can capture more energy than anything we have today will be reality outside the laboratory. And that should do a lot to spark greater interest in solar power.<\/p>\n<p><em>Correction: An earlier version of this story quoted Dr. Zhu as referring to an &#8220;electron whole pair,&#8221; the correct term is &#8220;electron-hole pair.&#8221;<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A new breakthrough on solar technology from a UT professor may mean a sunnier outlook in the future.<\/p>\n","protected":false},"author":51,"featured_media":3912,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[57],"tags":[30,32],"acf":[],"_links":{"self":[{"href":"https:\/\/stateimpact.npr.org\/texas\/wp-json\/wp\/v2\/posts\/3911"}],"collection":[{"href":"https:\/\/stateimpact.npr.org\/texas\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/stateimpact.npr.org\/texas\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/stateimpact.npr.org\/texas\/wp-json\/wp\/v2\/users\/51"}],"replies":[{"embeddable":true,"href":"https:\/\/stateimpact.npr.org\/texas\/wp-json\/wp\/v2\/comments?post=3911"}],"version-history":[{"count":15,"href":"https:\/\/stateimpact.npr.org\/texas\/wp-json\/wp\/v2\/posts\/3911\/revisions"}],"predecessor-version":[{"id":3984,"href":"https:\/\/stateimpact.npr.org\/texas\/wp-json\/wp\/v2\/posts\/3911\/revisions\/3984"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/stateimpact.npr.org\/texas\/wp-json\/wp\/v2\/media\/3912"}],"wp:attachment":[{"href":"https:\/\/stateimpact.npr.org\/texas\/wp-json\/wp\/v2\/media?parent=3911"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/stateimpact.npr.org\/texas\/wp-json\/wp\/v2\/categories?post=3911"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/stateimpact.npr.org\/texas\/wp-json\/wp\/v2\/tags?post=3911"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}