Water resistant CsPbX(3) nanocrystals coated with polyhedral oligomeric silsesquioxane and their use as solid state luminophores in all-perovskite white light-emitting devices.
Water resistant CsPbX(3) nanocrystals coated with polyhedral oligomeric silsesquioxane and their use as solid state luminophores in all-perovskite white light-emitting devices.
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DOI：
10.1039/c6sc01758d
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发表时间：
2016-09-01
期刊：
影响因子：
8.4
通讯作者：
Rogach AL
中科院分区：
文献类型：
--
作者：
Huang H;Chen B;Wang Z;Hung TF;Susha AS;Zhong H;Rogach AL
我们通过用多面体低聚倍半硅氧烷对 CsPbX3（X = Br 或 I）进行表面保护，提出了具有不同发射颜色的稳定固态钙钛矿基发光体。我们提出了一种通过用多面体低聚倍半硅氧烷 (POSS) 表面保护 CsPbX3（X = Br 或 I）来获得具有不同发射颜色的稳定固态钙钛矿基发光体的方法。这种处理产生了防水的钙钛矿纳米晶体粉末，并防止了以固态混合在一起的不同成分的钙钛矿纳米晶体之间容易发生的阴离子交换，这使我们能够保留其独特的发射光谱。随后，我们使用发绿光的 POSS–CsPbBr3 和发红光的 POSS–CsPb(Br/I)3 纳米晶体粉末的混合物来制造单层全钙钛矿下转换白光发光器件。
We present stable solid-state perovskite based luminophores with different emission colors via surface protection of CsPbX3 (X = Br or I) with a polyhedral oligomeric silsesquioxane. We present an approach towards stable solid-state perovskite based luminophores with different emission colors via surface protection of CsPbX3 (X = Br or I) with a polyhedral oligomeric silsesquioxane (POSS). This treatment results in water resistant perovskite nanocrystal powders, and prevents otherwise easy anion exchange between perovskite nanocrystals of different compositions mixed together in the solid state, which allows us to preserve their distinct emission spectra. We subsequently used mixtures of green-emitting POSS–CsPbBr3 and red-emitting POSS–CsPb(Br/I)3 nanocrystal powders to fabricate single layer all-perovskite down conversion white light-emitting devices.