On July 10, Nature published the paper "Planar perovskite solar cells with long-term stability using ionic liquid additives" published by Associate Professor Li Cheng of the School of Electronic Science and Technology (National Demonstration Microelectronics Institute) as a third author. ". In the article, by adding ionic liquid to the perovskite thin film, the photoelectric conversion efficiency and working stability of the solar cell device are significantly improved. Under simulated full-spectrum sunlight (ambient temperature 70 to 75 ° C), the performance of the packaged device is only reduced by about 5%, and the life span exceeds 1,800 hours. Based on this experiment, we can estimate that the performance of the device can drop to 80% of its optimal performance for 5200 hours. The results of this experiment paved the way for the large-scale application of perovskite batteries.
Metal halide perovskite solar cells are currently one of the most promising photovoltaic technologies. Their photoelectric conversion efficiency has reached 24.2%, surpassing amorphous silicon solar cells. However, the stability of the device still prevents its large-scale application. The biggest problem. Due to the movement of iodide ions in the perovskite material, the stability of the material under high light intensity and high temperature is problematic. Professor Henry J. Snaith of Oxford University and Prof. Bai Sai and Professor Gao Feng of Linköping University in Sweden added ionic liquid (1-butyl-3-methylimidazole tetrafluoroborate / BMIMBF4) to the perovskite film, which successfully improved the device The photoelectric conversion efficiency and long-term working stability. Associate Professor Li Cheng applied fluorescence imaging microscopy and other methods to characterize the process of ion movement and prove the inhibitory effect of ionic liquids on ion migration.
Kids Medical Masks,3 Layer Face Masks,Kids Face Shield,Earloop Disposable Face Mask
Henan Diyi Medical Technology Development Co.,Ltd. , https://www.diyimedical.com