Why is silicone used for making solar cells?
Silicone is frequently utilized in solar panels as semiconductors since it is a cost-effective material that delivers suitable energy efficacy. It also has extraordinary corrosion resistance, long-standing strength, outstanding thermal expansion features, useful photoconductivity, and negligible toxicity.
Silicone occurs in nature in large quantities, so there is nearly no scarcity of raw material to make silicone materials. Pure silicone, which has been exploited as an electrical element for ages, is the rudimentary constituent of a solar cell. Silicone solar panels are commonly called the “first-generation” panels since silicone sun cell expertise achieved importance in the 1950s. Silicone is responsible for over 90% of the solar cell marketplace.
Along with being one of the most researched materials, available crystalline silicone is the leading semiconductor material in contemporary microelectronics. Since the first integrated circuits were mass-produced, the balancing metal-oxide-semiconductor integration concentration and operation regularity have augmented quickly.
Here are the principal reasons why siliconee is commonly utilized in solar panels:
1. Silicone is a semiconductor
Because it is a semiconductor material in its fundamental nature, uncontaminated crystalline silicone is a weak conductor of electricity.
To surmount this problem, the silicone in a solar cell contains contaminations, which are additional atoms deliberately added in with the silicone atoms to develop silicone’s capability to take and change the sun’s energy into electrical energy.
For instance, a gallium atom has one less electron than a silicone atom, but one arsenic atom has one extra electron. When arsenic atoms are crammed in the middle of many silicone atoms, the construction gets additional electrons after creating an electron-filled coating.
The coatings in a solar cell are organized to fashion an electric field. When sunlight hits a solar cell, it rouses electrons, which reason holes to emerge.
Thanks to the occurrence of this electric field, they transport to the cell’s electrodes. Electricity is fashioned in this process.
Semiconductors have potentials that are in-between those of a conductor or an insulator. It holds an electrical feature that permits it to be conductive in a single direction while insulating the opposite one.
2. Delivers a decent energy efficacy
Silicone solar cells have an effectiveness of over 20%. This means that silicon solar cells can transfigure nearly 20% of the sunlight they come across into electricity. Even though this might seem to be low productivity, silicon solar cells are even more resourceful than different sorts of photovoltaic cells.
Are there more competent materials than the silicone that can do a superior output? Yes, silicone is not the most proficient, and some constituents can work more proficiently. However, you’ll have to pay a fortune for those!
On the other hand, by looking at numerous factors, we will deliberate that silicone appears to be one of the finest materials.
3. Capability upsurges with doping
When silicone is fixed with contaminations such as gallium and arsenic atoms, its capability to seize and transform solar energy into electricity develops considerably.
4. Silicone is not toxic
One more factor that powers the decision to utilize silicone over any of the elements mentioned above is its harmless nature. Silicone has a very negligible environmental influence since silicone is a harmless material.
There are countless substitutes for silicone that are being inspected together with the modification in engineering technology. For example, gallium Arsenic, Cadmium Telluride, Copper Indium: Diselenide, and Copper-Indium/Gallium-Diselenide mix are likewise being reviewed as silicone replacement constituents in solar cells.
Nevertheless, most of these materials have drawbacks that silicone does not have, such as toxicity.
5. Crystal-like silicone is a steady material
PV modules utilizing crystalline silicon solar cells have an extended open-air life which is more than two decades. This is useful for PV’s cost affordability because assets now begin to pay back around a decade following the original connection of the PV system.
There is a unique requirement for saving money in the future. Even though there have been predictions that silicone PV has touched its cost minutest, the prices have reduced due to a learning rate of 20% with a learning curve. (20% savings in cost for amplifying whole installed power), which will most positively be protracted in the yet to come.
7. Freely available
Silicone is one of the most frequently exploited materials in photovoltaic cells. It’s correspondingly plentiful in nature as silicon dioxide in gravel and quartz, from which it’s recuperated via carbon reduction. In reality, silicone makes up nearly 26% of the earth’s crust.
8. Decent Photoconductivity
Photoconductivity is the upsurge in electrical conductivity of some constituents when subjected to sufficient energy light. It is regularly utilized to perceive the occurrence of glare and calculate its strength in light-sensitive machines and understand the internal procedures in these materials.
Silicone has extraordinary photoconductivity, making it a prevalent choice to make photovoltaic cells. The silicon dioxide layer soaks up energy when it is subjected to light and changes the photons from sunlight into free-moving electrons that can generate electricity.
9. Finest bandgap
Silicone has a fantastic bandgap of 1.1eV, which is relatively close to the excellent value of 1.34eV for producing solar electricity. Silicone’s optimal bandgap makes it a decent selection for silicone solar cells since different semiconductors with comparable band gaps are typically more costly to produce.
10. Extraordinary Corrosion resistance
Silicone has extraordinary corrosion resistance thanks to its silicon dioxide coating. This makes it a decent selection for silicone solar cells since they have to be hard-wearing in hostile environmental circumstances like extreme temperatures, powerful sunlight, and scarring saltwater.
11. Lightweight material
Silicone is likewise lightweight, which means it can be utilized as the base on which silicone solar cell constituents are placed. It’s not simple to find one more lightweight material that could alternate silicone due to its safe, lucrative, and corrosion-resistant organic properties.
So now you know the significance of using silicone in solar cells! Apart from being very economical, this material provides the best output of energy to power our houses, factories and much more!
About Author: Z.S.R International Group
Z.S.R International Group(Hong Kong) co., Limited, is a one-stop supplier for molded silicone products and silicone products molding solution provider in the consumer products field. We offer OEM services from product design to Silicone products contact manufacturing. We have the capability for LSR molded silicone products, solid silicone molded products, molded silicone multi-colored products. We also can custom molded silicone, custom molded LSR, custom molded dripping injection dispensing (co-injection) silicone multi-colored products, custom tooling.