Open AccessOptical properties of molecular nanocrystals consisting of J-aggregates of anionic and cationic cyanine dyes
Author(s) -
B. I. Shapiro,
A. D. Nekrasov,
В. С. Кривобок,
В. С. Лебедев
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.030324
Subject(s) - cyanine , materials science , nanocrystal , photoelectric effect , absorption (acoustics) , photoluminescence , photoconductivity , absorption spectroscopy , optoelectronics , j aggregate , photodetector , visible spectrum , optics , molecule , nanotechnology , chemistry , fluorescence , organic chemistry , physics , composite material
We report results of experimental studies of the photoabsorption, photoluminescent and photoelectric properties of a new type of multilayer molecular nanocrystals, consisting of highly ordered J-aggregates of one anionic and two cationic J-aggregates of cyanine dyes. In contrast to conventional J-aggregated dyes the multichromic nanocrystals synthesized in this work, are capable of efficient light absorption in three excitonic bands of the visible and near-IR spectral ranges. The spectral peak positions in the absorption bands can be controlled by appropriately selecting a set of dyes a molecular crystal is made of. Our investigations of the photoelectric properties of multichromic crystals have shown that each of them can potentially be used as a photosensitive layer of a photocell with photoconductivity in three peaks of excitonic absorption. The synthesized nanocrystals are attractive for the creation of thin-film organic photodetectors with a large photosensitive area and varied photoabsorption spectra, excitonic waveguides and for some other applications in organic and hybrid photonics and optoelectronics.