Photovoltaic panels 25 years ago
In the 19th century, it was observed that the sunlight striking certain materials generates detectable electric current – the photoelectric effect. This discovery laid the foundation for solar cells. Solar cells have gone on to be used in many applications. They have historically been used in situations where electrical power.
• 1839 -observes the via an electrode in a conductive solution exposed to light.• 1873 -finds thatshows .
• 1932 - Audobert and Stora discover the photovoltaic effect in (CdSe), a photovoltaic material still used today.• 1935 - Anthony H. Lamb receives patent US2000642, "Photoelectric device." • 1946 -files patent US2402662, "Light.
• 1980 - Theat University of Delaware develops the first exceeding 10% efficiency using Cu2S/CdS technology.• 1981 -is founded byin.
2020•ofhave increased from 3.8% in 2009to 25.2% in 2020 in single-junction architectures,and, in silicon-based tandem cells, to 29.1%,exceeding the maximum efficiency.
• 1901 - observes the variation in electron energy with light frequency.• 1904 -makes a semiconductor-junction solar cell ( and ).• 1904 -.
• 1960 - Hoffman Electronics creates a 14% efficient solar cell.• 1961 - "Solar Energy in the Developing World" conference is held by the .• 1962 - The communications satellite is powered by solar cells.
• 2003 - George Bush has a 9 kW PV system and a solar thermal systems installed on grounds keeping building at the White House • 2004 - California Governor Arnold Schwarzenegger proposed Solar Roofs Initiative for one million solar roofs in.
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