If the First Solar Entrepreneur Hadn't Been Kidnapped, Would Fossil Fuels Have Dominated the 20th Century

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3. There's some questions about that

https://solar.lowtechmagazine.com/2021/10/how-to-build-a-low-tech-solar-panel

Creating the largest possible temperature difference is key to thermoelectric power production, so Cove’s design makes sense. The problem is that when he measured the power output of his generator, it did not respond to heat like a thermo-electric generator was supposed to do. Initially, Cove observes that his invention uses both heat and light to produce electricity when exposed to solar energy:

“The principal part of my invention is the peculiar composition of the metallic plugs which are acted upon by the sun in such a way that the current is generated not only by heat rays but the violet rays as well”.

However, after further experiments with both the wood stove and solar energy, Cove states:

“When the machine is exposed to various sources of artificial heat it gives no electricity whatsoever. Other than the heat rays of the sun (short-wave infrared), perhaps the violet or ultraviolet rays are active in setting up the electrical current”.