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Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
Published on: October 24, 2017
High-performance multiple-resonance thermally activated delayed fluorescence emitters with a targeted deuteration
Yixuan Jiang1, Yangze Xu1, Zihan Su1
1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Avenue, Changchun 130012, China. liuft@jlu.edu.cn.
Chemical Communications (Cambridge, England)
|May 11, 2026
Summary
This study introduces a novel deuterated emitter, BN-pCzPhD, enhancing photoluminescence quantum yield (PLQY) and the reverse intersystem crossing rate (kRISC). Deuteration significantly boosts the performance of this advanced material.
Area of Science:
- Materials Science
- Organic Chemistry
- Photophysics
Background:
- Thermally activated delayed fluorescence (TADF) materials are crucial for efficient organic light-emitting diodes (OLEDs).
- Tuning molecular structure is key to optimizing TADF properties.
- Deuteration is an emerging strategy to enhance photophysical properties.
Purpose of the Study:
- To synthesize and characterize a novel deuterated MR-TADF emitter, BN-pCzPhD.
- To investigate the impact of targeted deuteration on photoluminescence quantum yield (PLQY) and the reverse intersystem crossing rate (kRISC).
- To compare the performance of the deuterated emitter with its protonated analogue.
Main Methods:
- Organic synthesis of BN-pCzPhD.
- Spectroscopic characterization (photoluminescence, transient absorption).
- Photophysical parameter calculation (PLQY, kRISC).
Main Results:
- Successful synthesis of the deuterated MR-TADF emitter BN-pCzPhD.
- Significant enhancement in PLQY for BN-pCzPhD compared to BN-pCzPh.
- Substantial increase in the reverse intersystem crossing rate (kRISC) observed in the deuterated material.
Conclusions:
- Targeted deuteration at the para-position of the BCzBN core effectively enhances emitter performance.
- BN-pCzPhD demonstrates superior photophysical properties compared to its protonated counterpart.
- Deuteration is a viable strategy for developing high-performance TADF emitters for optoelectronic applications.
