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Enhancing the stability of perovskite solar energy..

Newstime:2017-06-23 14:16:54

In March 18, 2016, South Korea's Gwangju Institute of Science and Technology (GIST) researchers through the introduction of organic amine in Perovskite Thin film photovoltaic device interface modified electrode interface, can effectively prevent the penetration of halogen ions, and then improve the stability of perovskite solar cell.

The maximum photoelectric conversion efficiency of perovskite type photovoltaic cells has reached over 20%. However, the stability of this kind of batteries can not meet the needs of practical application. The attenuation mechanism of perovskite batteries is not clear enough and perfect. It is generally believed that the permeation of halogen atoms into metal electrodes (usually aluminum or silver) in a perovskite crystal film leads to the decay of electrode corrosion and affects the performance of the device. Accordingly, GIST researchers developed an organic amine (ethylene glycol) modified metal oxide (TiOx) as an electrode modified layer. The organic amine in the modified layer can effectively prevent the diffusion process of halogen ions, thereby improving the stability of the perovskite solar cell device. Using this interface modification scheme, the efficiency of perovskite solar cells after 1 years (9000 hours) the initial photoelectric conversion efficiency of storage in an inert atmosphere or not encapsulated under air atmosphere for 200 hours after keep its 80%.

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