of cooling buildings. 2022 30 May - A team at Fraunhofer ISE led by Frank Dimroth developed a 4-junction solar cell with an efficiency of 47.6% - a new world record for solar energy conversion. 13 July – Researchers report the development of semitransparent solar cells that are as large as windows, after team members achieved record efficiency with high transparency in 2020. On 4 July, researchers report the fabrication of solar cells with a record average visible transparency of 79%, being nearly invisible. 9 December – Researchers report the development of 3D-printed flexible paper-thin organic photovoltaics. 19 December – A new world record solar cell efficiency for a silicon-perovskite tandem solar cell is achieved, with scientists in Germany converting 32.5% of sunlight into electrical energy. See also Energy development History of wind power List of energy topics List of solar energy topics Financial incentives for photovoltaics Smart grid#Research Timeline of materials technology Timeline of hydrogen technologies Timeline of sustainable energy research 2020–present List of years in science References External links "Solar Resources". SunPower Corporation, 2004. "History: Photovoltaics Timeline". About, Inc., 2005. Lenardic, Denis, "Photovoltaics - Historical Development". PVResources.com, 2015. Perlin, John, "Making Electricity Directly from Sunlight". Rahus Institute, 2002. Trinkaus, George, "The Lost Inventions of Nikola Tesla". Free Energy Receiver, Chapter 9. Firm ups solar cell forecast for 2006, 2007 Electrical-engineering-related lists Solar cell Solar cells