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American researchers experimented with unconventional solar-energy designs, such as this thermoelectric panel. (Universal History Archive / Universal Images Group / Getty) You wouldn’t know it today, but the silicon photovoltaic solar cell the standard, black-and-copper solar panel you can find on suburban rooftops and solar farms was born and raised in America. The technology was invented here. In 1954, three American engineers at Bell Labs discovered that electrons flow freely through silicon wafers when they are exposed to sunlight. It was deployed here. In 1958, the U.S. Navy bolted solar panels to Vanguard 1, the second American satellite in space. And for a time, it was even made here. In the 1960s and ’70s, American companies dominated the global solar market and registered most solar patents. As late as 1978, American firms commanded 95 percent of the global solar market,  Đọc tiếp Why the U.S. Doesn’t Dominate the Solar-Panel Industry Anymore →

United statesUs navyPanel industryHistory archive universal images group gettyUniversal history archiveUniversal images groupBell labsSolar panel industryஒன்றுபட்டது மாநிலங்களில்எங்களுக்கு கடற்படைகுழு தொழில்வரலாறு காப்பகம் உலகளாவிய படங்கள் குழு கெட்டிஉலகளாவிய வரலாறு காப்பகம்உலகளாவிய படங்கள் குழுமணி ஆய்வகங்கள்சூரிய குழு தொழில்