The solar panel on the calculator captures the sun’s energy and converts it into electricity, which powers the calculator’s LCD display. (Because the display on the calculator itself is small and requires less power, the general size, power, voltage and current when designing solar panels are smaller than those of solar panels on the market that we have seen), The material of the solar panel is amorphous silicon. Silicon is a fairly common element on Earth – beach sand, for example, is made of silicon compounds. Purifying silicon is difficult, however, which is why it is not cheap, despite being so plentiful in the Earth’s crust.
The silicon in the calculator’s solar panel is not pure because it is doped or chemically treated to add specific impurities. Doped silicon with extra electrons is called N-type, while doped silicon lacking electrons is called P-type. N-type silicon typically contains added antimony, arsenic, or phosphorus, while P-type silicon typically contains added boron, aluminum, or gallium. Treating silicon with phosphine gas or PH3 can add phosphorus to make N-type silicon, while diborane gas or B2H6 can add boron to make P-type silicon. Generally, the main raw materials used are monosilane (SiH4), disilane (Si2H6), silicon tetrafluoride (SiF4), etc., and the purity requirements are very high.Please refer to:eve 280ah lifepo4
It is also because of the environment in which the calculator is used that it determines the type of solar panel it uses. As we all know, crystalline silicon solar panels can generate electricity only under the sun, while the calculator is used indoors, with insufficient light, and amorphous silicon solar panels just meet this feature, with good low-light performance and useful Light can even generate electricity. Of course, there must be its disadvantages. Its power generation efficiency is relatively low, maybe even only about 10%, and its service life is relatively short. Calculator As mentioned above, the required current is very small, and amorphous silicon can fully meet it.