Related Experiment Video
Updated: Sep 23, 2025
08:51
Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
Published on: October 24, 2017
9.7K
Structurally Resemblant Dopants Enhance Organic Room-Temperature Phosphorescence
Kok Chan Chong1, Chengjian Chen1, Cheng Zhou2
1Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, 117585, Singapore.
Advanced Materials (Deerfield Beach, Fla.)
|May 13, 2022
Summary
Doping organic phosphors with specific isomers enhances room-temperature phosphorescence (RTP). This strategy uses isomer dopants with similar energy levels to the host for efficient light emission, achieving yellow to red colors.
Area of Science:
- Materials Science
- Organic Chemistry
- Photophysics
Background:
- Doping is a key strategy for achieving room-temperature phosphorescence (RTP) in organic materials.
- Dibenzothiophene (DBT) derivatives are explored for their potential in RTP applications.
Purpose of the Study:
- To develop a novel isomer design and doping strategy for enhancing RTP in DBT derivatives.
- To investigate the effect of isomer dopants on the photophysical properties of DBT-based organic phosphors.
Main Methods:
- Synthesis of three specific isomers for doping DBT derivatives.
- Characterization of the synthesized isomers and their doped systems.
- Analysis of the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels and singlet-triplet energy differences.
Main Results:
- Isomer dopants with closely matched HOMO/LUMO energy levels and small singlet-triplet energy differences significantly enhance RTP efficiency.
- The phosphorescence color of the doped DBT derivatives can be tuned from yellow to red by selecting different isomer dopants.
- Successful implementation of an isomer design and doping strategy for efficient RTP.
Conclusions:
- Isomer design and doping offer a facile and effective approach to engineer RTP properties in organic phosphors.
- Tailoring dopant-host interactions at the molecular level is crucial for optimizing RTP performance.
- This strategy provides a pathway for developing novel luminescent organic materials with tunable emission colors.
Related Concept Videos
01:14Photoluminescence: Applications
510
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
510
01:26Variables Affecting Phosphorescence and Fluorescence
605
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
605
01:23Photoluminescence: Fluorescence and Phosphorescence
2.4K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
2.4K
01:25Fluorescence and Phosphorescence: Instrumentation
790
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
790