{"id":84179,"date":"2016-11-15T07:12:27","date_gmt":"2016-11-15T05:12:27","guid":{"rendered":"https:\/\/www.technion.ac.il\/blog\/photovoltaic-cells-70-efficiency\/"},"modified":"2016-11-15T07:12:27","modified_gmt":"2016-11-15T05:12:27","slug":"photovoltaic-cells-70-efficiency","status":"publish","type":"post","link":"https:\/\/www.technion.ac.il\/en\/blog\/photovoltaic-cells-70-efficiency\/","title":{"rendered":"Photovoltaic Cells – 70% Efficiency"},"content":{"rendered":"

New Technology Aims to Makes Photovoltaic Cells 70% More Effective<\/b><\/span><\/p>\n

Technion researchers have developed a technology that could improve the efficiency of photovoltaic cells by nearly 70 percent. The study was conducted at the Excitonics Lab, headed by Assistant Professor Carmel Rotschild at the Faculty of Mechanical Engineering, with the assistance of the Grand Technion Energy Program (GTEP) and the Russell Berrie Nanotechnology Institute (RBNI) at the Technion, and as part of the lab\u2019s ERC project on new thermodynamic tools for solar cells.<\/p>\n

The sun is a powerful source of renewable energy. In fact, it is currently the only energy source capable of supplying the energy consumption of the human race, so it\u2019s no wonder that the use of solar energy is increasing. But there are currently a number of technological limitations when it comes to photovoltaic cell efficiency.<\/span><\/p>\n

Photovoltaic cells optimally utilize a very narrow range of the solar spectrum – the broad light supplied by the sun; radiation not within this narrow range merely warms these cells and is not utilized. \u00a0This energy loss limits the maximum efficiency of current solar cells to around 30%.<\/span><\/p>\n

The Technion team\u2019s method is based on an intermediate process that occurs between sunlight and the photovoltaic cell. The photoluminescence material they created absorbs the radiation from the sun, and converts the heat and light from the sun into an \u201cideal\u201d radiation, which illuminates the photovoltaic cell, enabling higher conversion efficiency. As a result, the device\u2019s efficiency is increased from 30% (the conventional value for photovoltaic devices), to 50%.<\/span><\/p>\n

The inspiration for the breakthrough comes from optical refrigeration, where the absorbed light is re-emitted at higher energy, thereby cooling the emitter. The researchers developed a technology that works similarly, but with sunlight.<\/span><\/p>\n

\u201cSolar radiation, on its way to the photovoltaic cells, hits a dedicated material that we developed for this purpose, the material is heated by the unused part of the spectrum,\u201d says graduate student Assaf Manor, who led the study as part of his PhD work. \u201cIn addition, the solar radiation in the optimal spectrum is absorbed and re-emitted at a blue-shifted spectrum. This radiation is then harvested by the solar cell. This way both the heat and the light are converted to electricity.\u201d <\/span><\/p>\n

The group hopes to demonstrate a full operating device with record efficiency within 5 years\u2019 time. If they are successful, they feel could become a disruptive technology in solar energy. \u00a0<\/span><\/p>\n

To the paper in Nature Communications <\/span>click here<\/a><\/strong><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

New Technology Aims to Makes Photovoltaic Cells 70% More Effective Technion researchers have developed a technology that could improve the efficiency of photovoltaic cells by nearly 70 percent. The study was conducted at the Excitonics Lab, headed by Assistant Professor Carmel Rotschild at the Faculty of Mechanical Engineering, with the assistance of the Grand Technion… Continue Reading Photovoltaic Cells – 70% Efficiency<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[24],"tags":[],"class_list":["post-84179","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"yoast_head":"\nPhotovoltaic Cells - 70% Efficiency - \u05d4\u05d8\u05db\u05e0\u05d9\u05d5\u05df-\u05de\u05db\u05d5\u05df \u05d8\u05db\u05e0\u05d5\u05dc\u05d5\u05d2\u05d9 \u05dc\u05d9\u05e9\u05e8\u05d0\u05dc<\/title>\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.technion.ac.il\/en\/blog\/photovoltaic-cells-70-efficiency\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Photovoltaic Cells - 70% Efficiency - \u05d4\u05d8\u05db\u05e0\u05d9\u05d5\u05df-\u05de\u05db\u05d5\u05df \u05d8\u05db\u05e0\u05d5\u05dc\u05d5\u05d2\u05d9 \u05dc\u05d9\u05e9\u05e8\u05d0\u05dc\" \/>\n<meta property=\"og:description\" content=\"New Technology Aims to Makes Photovoltaic Cells 70% More Effective Technion researchers have developed a technology that could improve the efficiency of photovoltaic cells by nearly 70 percent. 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