![]() However, solar calculators may not work well in indoor conditions under ambient lighting if sufficient light is not available. Some models also use a light pipe to converge light onto the solar cells. Solar calculators use liquid crystal displays, as they are power-efficient and capable of operating in the low-voltage range of 1.5–2 V. Scientific solar-powered calculators appeared in 1982. The first solar-powered (non-scientific) calculators available in the late 1970s included the Royal Solar 1, the Sharp EL-8026, and the Teal Photon. Īmorphous silicon has been used as a photovoltaic solar cell material for devices which require very little power, such as pocket calculators, because their lower performance compared to conventional crystalline silicon solar cells is more than offset by their lower cost and simplified deposition onto a substrate. They were introduced at the end of the 1970s. Solar-powered calculators are hand-held electronic calculators powered by solar cells mounted on the device. The "Teal Photon", one of the first solar-powered calculators of the late 1970s (left) and a modern solar-powered scientific calculator (right)
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