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Interested in installing solar panels but are a bit wary of the cost? A new and exciting technology has been discovered that will change solar energy forever and will make solar panels cheaper to produce.
Solar energy has been a popular and effective way to generate electricity for quite some time, with silicon solar cells being the most prevalent technology. However, silicon solar cells have their limitations, including their fragility and the amount of energy required to produce them. Additionally, if we were to rely solely on silicon solar cells to meet our energy needs, we could potentially run out of the materials needed to make them by 2050. This is where perovskite solar cells come into play. Perovskite solar cells are the future of solar energy, potentially making solar panels more affordable for the public.
What is Perovskite?
Perovskite solar cells are a new class of solar cells that have the potential to be more efficient and less expensive to produce compared to silicon solar cells. Online sources state that perovskite is a crystal structure that can be made with inorganic and organic components and was named after Lev Perovski, a mineral expert of the 17th and 18th centuries. These solar cells first appeared in research labs in 2012 and have since garnered attention due to their ability to convert sunlight into electricity and their potential to be created from a combination of inks.
The future
While perovskite solar cells have been shown to match the electricity generation of silicon solar cells in research labs, they have yet to be manufactured on a commercial scale. However, recent advancements have been made in the field of perovskite solar cells that could make them more accessible. For instance, researchers have demonstrated that rollable and printable perovskite solar cells can be produced using special inks. These solar cells are made from perovskite, which is much cheaper to produce than silicon, you can find out more here.
The process of printing and rolling out perovskite solar cells is not as simple as pouring ink into a desktop printer. To achieve record efficiencies, the semiconductor and perovskite layers in the solar cell must be extremely thin, between 50 and 500 nanometers. Additionally, the inks used to print them required highly toxic solvents. However, scientists have now formulated inks without toxic solvents that are compatible with the coating process, an established industrial technique originally used to produce photographic films.
The printed perovskite layer generates free electrons from the energy provided by light hitting it. The semiconductor then prevents the perovskite from re-absorbing these electrons. One issue that remained was how to extract the electrical charge. In the past, this had been achieved by heating gold in a vacuum until it evaporated and catching the vapour on the perovskite solar cell to form electrodes. However, researchers have now created a carbon ink compatible with the perovskite material, resulting in large volumes of flexible, rollable solar cells that come out of the printing press ready to generate power.
While perovskite solar cells have demonstrated high performance in research labs and have been proven capable of making the leap to high-volume manufacturing, there is still work to be done before they can match the energy generation of silicon. The 10% power conversion efficiency achieved by these rollable printed cells is useful, but it lags behind the typical 17% conversion efficiency of domestic solar panels in use today. Further improvements in the lifetime stability of perovskite solar cells are also required, which can be achieved through a combination of chemistry, device design, and other strategies such as protective coatings and laminated barrier films.
In conclusion, perovskite solar cells have the potential to revolutionise the way we generate electricity. They are less expensive to produce than silicon solar cells and can be printed and rolled out on flexible surfaces. While there is still work to be done to improve their efficiency and lifetime stability, the development of these solar cells is a promising step towards making solar energy more accessible and sustainable.