Nature最新研究进展：高效全固态染料敏化太阳能电池？最新一期Nature杂志报导了最新的研究进展---高效全固态染料敏化太阳能电池，转化效率达到10.2%。上传文章正文和Supporting供大家参考~摘要：Dye-sensitized solar cells based on titanium dioxide (TiO2) arepromising low-cost alternatives to conventional solid-state photovoltaicdevices based on materials such as Si, CdTe andCuIn12xGaxSe2 (refs 1, 2). Despite offering relatively high conversionefficiencies for solar energy, typical dye-sensitized solar cellssuffer from durability problems that result from their use oforganic liquid electrolytes containing the iodide/tri-iodide redoxcouple, which causes serious problems such as electrode corrosionand electrolyte leakage3. Replacements for iodine-based liquidelectrolytes have been extensively studied, but the efficiencies ofthe resulting devices remain low3–9. Here we show that the solutionprocessablep-type direct bandgap semiconductor CsSnI3 can beused for hole conduction in lieu of a liquid electrolyte. The resultingsolid-state dye-sensitized solar cells consist of CsSnI2.95F0.05doped with SnF2, nanoporous TiO2 and the dye N719, and showconversion efficiencies of up to 10.2 per cent (8.51 per cent with amask). With a bandgap of 1.3 electronvolts, CsSnI3 enhancesvisible light absorption on the red side of the spectrum to outperformthe typical dye-sensitized solar cells in this spectral region.. [ 来自科研家族 材料家族 ]查看更多0个回答 . 2人已关注
Yi Cui 组最新关于nano Si 作为电池电极的review (nanotoday)？Summary High energy lithium ion batteries are in demand for consumer electronics, electric-drive vehicles and grid-scale stationary energy storage. Si is of great interest since it has 10 times higher specific capacity than traditional carbon anodes. However, the poor cyclability due to the large volume change of Si upon insertion and extraction of lithium has been an impediment to its deployment. This review outlines three fundamental materials challenges associated with large volume change, and then shows how nanostructured materials design can successfully address these challenges. There have been three generations of nanostructure design, encompassing solid nanostructures such as nanowires, hollow nanostructures, and clamped hollow structures.The nanoscale design principles developed for Si can also be extended to other batterymaterials that undergo large volume changes.查看更多0个回答 . 17人已关注
催化的问题关于mass transfer limited？indicate in the manuscript that experiments were carried out in the absence of stirring. This is crucial as the experiments appear to be severely mass transfer limited as a result of absence of stirring. It is well-known in catalysis and authors should be aware that stirring or its absence can affect catalytic results，我不知道这个是什么意思，什么是mass transfer limited ,跟搅拌有什么关系查看更多7个回答 . 18人已关注
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