Open AccessStrong Coupling of Carbon Quantum Dots in Liquid Crystals
Author(s) -
Sema Sarisözen,
Nahit Polat,
Fadime Mert Balcı,
C. Meric Guvenc,
Coşkun Kocabaş,
H. Gül Yağlıoğlu,
Sinan Balci
Publication year - 2022
Publication title -
the journal of physical chemistry letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.563
H-Index - 203
ISSN - 1948-7185
DOI - 10.1021/acs.jpclett.1c03937
Subject(s) - photoluminescence , quantum yield , materials science , absorbance , quantum dot , absorption (acoustics) , ultrafast laser spectroscopy , excited state , spectroscopy , absorption spectroscopy , optoelectronics , emission spectrum , chemical physics , fluorescence , molecular physics , spectral line , photochemistry , chemistry , optics , atomic physics , physics , quantum mechanics , astronomy , composite material
Carbon quantum dots (CDs) have recently received a tremendous amount of interest owing to their attractive optical properties. However, CDs have broad absorption and emission spectra limiting their application ranges. We herein, for the first time, show synthesis of water-soluble red emissive CDs with a very narrow line width (∼75 meV) spectral absorbance and hence demonstrate strong coupling of CDs and plasmon polaritons in liquid crystalline mesophases. The excited state dynamics of CDs has been studied by ultrafast transient absorption spectroscopy, and CDs display very stable and strong photoluminescence emission with a quantum yield of 35.4% and a lifetime of ∼2 ns. More importantly, we compare J -aggregate dyes with CDs in terms of their absorption line width, photostability, and ability to do strong coupling, and we conclude that highly fluorescent CDs have a bright future in the mixed light-matter states for emerging applications in future quantum technologies.