Improved Photostability in Fluorinated 2D Perovskite Single Crystals

Ultrahigh sensitivity of methylammonium leadtribromide perovskite single crystals toenvironmental gases

D ow nladed fom One of the limiting factors to high device performance in photovoltaics is the presence of surface traps. Hence, the understanding and control of carrier recombination at the surface of organic-inorganic hybrid perovskite is critical for the design and optimization of devices with this material as the active layer. We demonstrate that the surface recombination rate (or surface t...

Solution-Grown CsPbBr3 Perovskite Single Crystals for Photon Detection

Merocyanine dyes with improved photostability.

Merocyanine dyes have proven valuable for live cell fluorescence imaging applications, but many structures have been limited by rapid photobleaching. We show that photostability is substantially enhanced for merocyanines having a cyano group at a specific position in the central polymethine chain. Evidence is presented that this is due to reduction in reactivity of the dyes with singlet oxygen....

Photostability of 2D Organic-Inorganic Hybrid Perovskites

We analyze the behavior of a series of newly synthesized (R-NH₃)₂PbX₄ perovskites and, in particular, discuss the possible reasons which cause their degradation under UV illumination. Experimental results show that the degradation process depends a lot on their molecular components: not only the inorganic part, but also the chemical structure of the organic moieties play an important role in bl...

Fluorinated liquid crystals formed by halogen bonding.

New, halogen-bonded fluorinated mesogens are reported; the expected microphase separation associated with perfluoroalkyl chains is surprisingly absent in the mesophase.