Hybrid Lead Halide Layered Perovskites with Silsesquioxane Interlayers

Abstract

Hybrid organic-lead halide perovskites exhibit remarkable properties as semiconductors and light absorbers. Here, we report the formation of silsesquioxane-lead halide hybrid layered perovskites. We prepared silsesquioxane with a cubic cage-like structure and fabricated hybrid silsesquioxane-lead halide layered perovskites in a self-assembled manner. It is demonstrated that the silsesquioxane maintain their cage-like structure between lead halide perovskite layers. The silsesquioxane-lead halide perovskites also show excitonic absorption and emission in the visible light region similar to typical lead halide layered perovskites.

Hybrid Perovskite-Based Materials Modified with Polyhedral Silsesquioxanes—Structure and Properties

“…Interestingly, the use of octa(propylammonium)octasilsesquioxane bromide (Br−POSS) or iodide (I−POSS) for the co-crystallization with PbCl2 did not involve the degradation of the silsesquioxane cube [43]. The plate-like products precipitated quite rapidly, and their PXRD diffractograms indicated layered structures with interlayer spacings (1.61 nm and 1.62 nm, respectively) similar to those calculated for Pb-A−POSS.…”