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Perovskite prepared by high-performance LED

From United States Florida State University research team developed a new type of light-emitting diodes, using an organic - inorganic hybrid material that can produce cheaper, brighter lights and displays.

Assistant professor of physics Hanwei Gao and associate professor of chemical engineering Biwu Ma is using a class called organometallic halide perovskite materials to produce a high-performance LED. They will study findings are published in (Advanced Materials) magazine.

'Early work may be found in the production of LED perovskite aspect is a promising material,' Hanwei Gao said. 'However, its performance has not yet reached fully demonstrated potential. We believe there is significant room for improvement. '

high-performance LED

In the past, other researchers have experimented with a perovskite production LED, but they can not make a particularly efficient Hanwei Gao and Biwu Ma think, if appropriate adjustment formula, the organic - inorganic mixture LED allows for better performance.

'When we think of this type of material, we know that it should have better performance,' Biwu Ma said. 'We propose a new approach to address some key issues in order to produce a high-performance LED.'

After several months up by synthetic chemical properties of materials and equipment to control the experiment works fine tuning device structure, they eventually produce beyond the expected high performance LED. The material is exceptionally bright.

'This extraordinary brightness depends largely on such a surface treatment, highly crystalline nanomaterials inherent high luminous efficiency,' Hanwei said.

Production of this material quickly and easily. In the laboratory, Hanwei and Biwu about one hour can produce this material, about half of the time will be able to create a complete device and test.

In addition, while bare mixed perovskites unstable in moist air, but perovskite nanostructures due to the surface chemistry of its specially designed, but it has good stability. Such a large extent reduce the chemical stability the production of this new LED facility requirements in the future for cost-effective production of great benefit.

This research has made crucial progress on LED technology, it is rapidly becoming reduce power consumption channels. Although there are a variety of LED lighting products sold on the market, but because of the cost of materials and related quality problems led to the popularity of LED lighting slowly.

However, LED lights save energy is an indisputable fact. According to the US Department of Energy, residential LED lighting energy than ordinary incandescent at least 75%.

'If you can produce a low-cost, high-performance LED, everyone will go to select it,' Biwu said. "For the industry, our method has a big advantage, because you can very economical way to Earth a wealth of material can be processed to produce this material. '

Their work also includes partnerships focused on LED technology research assistant professor of industrial and manufacturing engineering Zhibin Yu, and assistant professor of chemistry Kenneth Hanson ,He is co-author of the paper.

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