期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 9, 期 38, 页码 13266-13275出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1tc02838c
关键词
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资金
- National Natural Science Foundation of China [11774122, 61575079]
- National Science Fund for Young Scholars [11904123]
The study investigated the photo-physical properties of an organic molecule with two-photon fluorescence capabilities through spectroscopy tests, revealing their dependence on solvent polarity and temperature. These organic molecules show potential for applications in LEDs and their optoelectronic properties are affected by factors such as solvent polarity and temperature.
Organic molecules with hybridized local and charge transfer (HLCT) characters have attracted attention because of their potential in the field of two-photon fluorescence imaging and light-emitting diodes (LEDs). Herein, the 4-(1,1-difluoro-1H-1 lambda(4),10 lambda(4)-benzo[4,5]thiazolo[3,2-c][1,3,2]oxazaborinin-3-yl)-N,N-diphenylaniline (TOND) molecule is studied through various spectroscopy tests to explore the solvent-dependent photo-physical properties in the mono-disperse system and temperature-dependent photoluminescence behavior in the aggregation state system. The monodisperse TOND shows apparent two-photon fluorescence properties and its absorption section enhances with solvent polarity owing to the intramolecular charge transfer (ICT) process. The solvent-dependent relaxation process of excited TOND, which is affected by the ICT process, is analyzed by pump-probe and pump-dump-probe tests. The aggregated TOND can be fabricated into an LED, whose emission peak is centered at 566 nm with the Commission Internationale de l'Eclairage chromaticity (CIE) coordinates of (0.47, 0.51). Their radiative lifetime and photoluminescence quantum yield together decrease with increasing temperature, due to the activation of the non-radiative process at high temperatures. Our results provide a comprehensive insight into the optoelectronic properties of these organic molecules.
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