Greatly increased scientists inventing cheap solar cells for solar energy utilization

Polaris solar PV net news: foreign media said that plants can be easily stored solar energy: photosynthesis, which uses light to create energy-rich compounds. However, their light efficiency is only around 1%. Therefore, scientists began experimenting with early artificial photosynthesis and produce solar energy can be used to obtain hydrogen batteries.

According to the Germany weekly der Spiegel website reported on September 27, this type of photosynthesis, cell research now has made significant progress in its work. An international research team in the latest issue of United States Science magazine presents an efficient and cheap method of obtaining hydrogen from water using solar energy. This so-called perovskite-type solar cell technology for solar energy utilization at 12.3%.

Due to its high energy density, hydrogen is considered an important energy carrier in the future. As efficiently as possible to obtain hydrogen through the Sun will solve major problems in the process of utilizing solar energy: hydrogen can only be gets during the day, and difficult to store.

Despite conventional solar cells and using electricity to break water into oxygen and hydrogen gas by electrolysis device combination is possible, but the cost is too expensive. Solar and fusion within a part of the electrolytic method is expected to improve efficiency-methods as described in the journal Science.

Switzerland Lausanne Federal Polytechnic Michaele ˙ Gray’s plan leads the research team, said new types of solar cells using calcium titanium minerals, nickel, and iron-rich substances on Earth.

Greg answers because the battery named after him, is known for. This battery is a silicon based alternatives to conventional solar cells. Gray CE battery using the natural fuel to absorb solar energy, similar to photosynthesis in plants. But so far tend to use expensive rare elements.

Now, researchers are now two perovskite-type solar cells are grouped together, so that we can provide enough voltage to the electrolysis of water (at least 1.23 volts). Electrolysis of water through two chemical reactions achieve, producing hydrogen and an oxygen-producing. For cost reasons, Gray’s strategy and his colleagues decided to choose a catalyst for these two reactions: mixed iron-nickel hydroxides. This substance and nickel together form the outer surface of the electrodes, electrolysis of water just above it.

Test, split water light fading, but lull (in actual operation possible during the night) later regained full power. Researchers don’t understand why perovskite-type solar cells have such a performance.

United States of Michigan State University’s Thomas ˙ Harman in a commentary published in the journal Science wrote: “Although the hydrolysis method 12% for solar energy utilization has been unusual, but there are many ways to improve it. ”

He wrote that if perovskite-type solar cells and semiconductors (such as Silicon) are grouped together, and light energy utilization and will rise to 20%; through more suitable catalysts capable of improving chemical reactions produce hydrogen. He said figuring out perovskite-type solar cells could in future energy compete against fossil fuel, is an exciting thing.

Original title: scientist inventing cheap solar cells for solar energy utilization has increased

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