منابع مشابه
Thermal degradation of luminescence in inorganic perovskite CsPbBr3 nanocrystals.
The luminescence properties of inorganic perovskite CsPbBr3 nanocrystals (NCs) with emissions of 492 and 517 nm under thermal annealing treatment were studied by temperature-dependent photoluminescence (PL) spectroscopy. The CsPbBr3 NCs were annealed in vacuum at various temperatures. It was found that the NCs exhibited significant thermal degradation of PL at thermal annealing temperatures abo...
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— The dichroic nature of the optical absorption and luminescence bands of a defect centre in fast neutron and proton irradiated a-Al203 have been studied at 4 K. The investigation centred on an absorption band at 358 nm and a mirror image emission band at 379 nm. These bands show resolved vibronic structure with a zero-phonon line at 368.4 nm and are due to allowed electric dipole transitions. ...
متن کاملSimulation of circularly polarized luminescence spectra using coupled cluster theory.
We report the first computations of circularly polarized luminescence (CPL) rotatory strengths at the equation-of-motion coupled cluster singles and doubles (EOM-CCSD) level of theory. Using a test set of eight chiral ketones, we compare both dipole and rotatory strengths for absorption (electronic circular dichroism) and emission to the results from time-dependent density-functional theory (TD...
متن کاملElectric Field Oriented Nanostructured Organic Thin Films with Polarized Luminescence
The effect of the external electric field of 105 V/m on the ordering of two luminescent liquid crystalline molecules (1-pentyl-2/,3/-difluoro-3///-methyl-4////-octyl-p-quinguephenyl and 9,10-Bis (4-pentylphenylethynyl)antracene) during thermal vacuum deposition is studied. The morphology, electrical conductivity, optical absorption, luminescence spectra, and polarization are presented and analy...
متن کاملHelically assembled π-conjugated polymers with circularly polarized luminescence
We review the recent progress in the field of helically assembled π-conjugated polymers, focusing on aromatic conjugated polymers with interchain helical π-stacking that exhibit circularly polarized luminescence (CPL). In Part 1, we discuss optically active polymers with white-colored CPL and the amplification of the circular polarization through liquid crystallinity. In Part 2, we focus on the...
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ژورنال
عنوان ژورنال: Science
سال: 2020
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.369.6504.640-g