Abstract We synthesised cesium lead bromide and formamidinium lead bromide perovskite colloidal nanocrystals by ligand-assisted reprecipitation method for the wide-colour gamut low-cost displays. The prepared perovskite colloidal nanocrystal solutions were formulated into the ink-jet printable homogeneous inks and uniformly coated as the colour conversion layers of the quantum dot organic light-emitting diode displays. The silica capped CsPbBr3 nanocrystals were very stable in high temperature observation while the FAPbBr3 showed the excellent long-term stability at room temperature even without the silica passivation. The ink-jet printed colour conversion films had very narrow full-width-at-half-maximums of around 20 nm and high photoluminescence quantum yields of 73.0% and 76.9%, respectively. Particularly, the FAPbBr3 thin film had an excellent cut-off ratio of blue emission and exhibited external quantum efficiency of 5.39% when fabricated as the hybrid display devices.

中文翻译：

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高稳定性钙钛矿纳米晶体的合成和表征及其在喷墨印刷颜色转换层中的应用

摘要 我们通过配体辅助再沉淀法合成了溴化铯铅和溴化甲脒铅钙钛矿胶体纳米晶体，用于广色域低成本显示器。将制备的钙钛矿胶体纳米晶溶液配制成可喷墨打印的均质油墨，并均匀涂覆作为量子点有机发光二极管显示器的颜色转换层。二氧化硅封端的 CsPbBr3 纳米晶体在高温观察中非常稳定，而 FAPbBr3 在室温下显示出优异的长期稳定性，即使没有二氧化硅钝化。喷墨印刷的颜色转换膜具有非常窄的半峰全宽约 20 nm 和分别为 73.0% 和 76.9% 的高光致发光量子产率。特别，