Open‐cage silsesquioxane, in which traditional closed‐cage silsesquioxane is partially hydrolyzed, is a promising class of building blocks for constructing organic‐inorganic hybrids. It has advantages of high thermal stability, low crystallinity, transparency, designability, etc. Although the structural effects of closed‐cage silsesquioxanes have been elucidated in detail so far, those of open‐cages have never been studied. Herein, we synthesized corner‐ and side‐opened cage silsesquioxanes having carbazole units at the open moieties. The former was amorphous in the solid state and polymer matrix, while the latter formed crystalline structures. These different packing structures caused significant difference in the performance as an emission layer of organic light emitting device.

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角开式和侧开式笼式倍半硅氧烷：对材料性能的结构影响

传统的封闭式硅倍半氧烷在其中部分水解的开放式硅倍半氧烷是一类很有前途的构建有机-无机杂种的构件。它具有高热稳定性，低结晶度，透明性，可设计性等优点。尽管迄今为止已经详细阐明了密闭笼型倍半硅氧烷的结构效应，但从未研究过开笼形笼型。在这里，我们合成了在开放部分具有咔唑单元的角和侧开笼式倍半硅氧烷。前者在固态和聚合物基质中为非晶态，而后者形成晶体结构。这些不同的填充结构导致作为有机发光器件的发射层的性能上的显着差异。