Ultra long-lived electron-hole separation within water-soluble colloidal ZnO nanocrystals: Prospective applications for solar energy production
Ultra long-lived electron-hole separation within water-soluble colloidal ZnO nanocrystals: Prospective applications for solar energy production
复制标题
DOI：
10.1016/j.nanoen.2016.09.045
复制
发表时间：
2016-12-01
期刊：
影响因子：
17.6
通讯作者：
Sa, Jacinto
中科院分区：
文献类型：
--
作者：
Cieslak, Anna M.;Pavliuk, Mariia V.;Sa, Jacinto
氧化锌是最早用于染料敏化太阳能电池的半导体之一，但其在水介质中的不稳定性阻碍了其大规模应用。在此，我们报告了一种新的ZnO纳米材料，该材料是由有机金属的方法，同时是稳定的，可溶于水，由于其羧酸盐低聚乙二醇壳强烈锚定到无机核心的头部基团。由此产生的独特的无机核-有机壳界面也稳定了光生空穴，导致电荷复合的急剧减慢，否则这是使用纳米结构ZnO的主要障碍。
Zinc oxide was one of the first semiconductors used in dye-sensitized solar cells but its instability in aqueous media precludes its use for large-scale applications. Herein, we report on a novel ZnO nanocrystal material derived by an organometallic approach that is simultaneously stable and soluble in water due to its carboxylate oligoethylene glycol shell strongly anchored to the inorganic core by the head groups. The resulting unique inorganic core-organic shell interface also stabilizes the photo-generated hole, leading to a dramatic slowing down of charge recombination, which otherwise is a major hurdle in using nanostructured ZnO.