The author of 《Planar perovskite solar cells with long-term stability using ionic liquid additives》 were Bai, Sai; Da, Peimei; Li, Cheng; Wang, Zhiping; Yuan, Zhongcheng; Fu, Fan; Kawecki, Maciej; Liu, Xianjie; Sakai, Nobuya; Wang, Jacob Tse-Wei; Huettner, Sven; Buecheler, Stephan; Fahlman, Mats; Gao, Feng; Snaith, Henry J.. And the article was published in Nature (London, United Kingdom) in 2019. Recommanded Product: 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate The author mentioned the following in the article:
Solar cells based on metal halide perovskites are one of the most promising photovoltaic technologies1-4. Over the past few years, the long-term operational stability of such devices has been greatly improved by tuning the composition of the perovskites5-9, optimizing the interfaces within the device structures10-13, and using new encapsulation techniques14,15. However, further improvements are required in order to deliver a longer-lasting technol. Ion migration in the perovskite active layer-especially under illumination and heat-is arguably the most difficult aspect to mitigate16-18. Here we incorporate ionic liquids into the perovskite film and thence into pos.-intrinsic-neg. photovoltaic devices, increasing the device efficiency and markedly improving the long-term device stability. Specifically, we observe a degradation in performance of only around five per cent for the most stable encapsulated device under continuous simulated full-spectrum sunlight for more than 1,800 h at 70 to 75°C, and estimate that the time required for the device to drop to eighty per cent of its peak performance is about 5,200 h. Our demonstration of long-term operational, stable solar cells under intense conditions is a key step towards a reliable perovskite photovoltaic technol. In the experiment, the researchers used 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate(cas: 174501-65-6Recommanded Product: 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate)
3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate(cas: 174501-65-6) is a member of lonic liquids. Actually, lonic liquids as innovative fluids have received wide attention only during the past two decades. The number of SCI papers published on lonic liquids has exponentially increased from a few in 1996 to >5000 in 2016, exceeding the annual growth rates of other popular scientific areas. Recommanded Product: 3-Butyl-1-methyl-1H-imidazol-3-ium tetrafluoroborate
Referemce:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem