Castelli, Andrea published the artcileRevealing Photoluminescence Modulation from Layered Halide Perovskite Microcrystals upon Cyclic Compression, Name: N-Methylformamide, the main research area is layered hybrid halide perovskite microcrystals cyclic compression photoluminescence piezooptical; mechanical cycles; perovskite 2D microcrystals; photoluminescence; pressure.
Halide perovskites show promise for high-efficiency solar energy conversion and light-emitting diode devices owing to their bandgap, which falls within the visible optical range. However, due to their rigidity, GPa pressures are necessary to control the complex interplay between their electronic and crystallog. structure. Layered perovskites are likely to be controlled using much lower pressures by exploiting the optical anisotropy of the embedded organic mols. in the structure. This work introduces layered perovskite microplatelets and demonstrates the extreme sensitivity of their emission to cyclic mech. loading in the range of tens of MPa. A drastic change in their emission is observed in situ, from near-white to an enhanced blue color. This process is reversible, as is evident from a hysteresis loop in the photoluminescence (PL) intensity of the microplatelets. A combination of exptl. anal. and computational modeling shows that such behavior cannot be attributed to changes in the crystallog. structure of the flakes. Instead, it suggests that, thanks to their structural anisotropy, microplate alignment and reorientation are responsible for the observed PL modulation. The possibility to tune the optical emission of layered perovskite crystals via low pressures makes them highly interesting as active materials in applications where stress sensing or light modulation is desired.
Advanced Materials (Weinheim, Germany) published new progress about Compression. 123-39-7 belongs to class amides-buliding-blocks, name is N-Methylformamide, and the molecular formula is C2H5NO, Name: N-Methylformamide.
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics