Analyzing and Developing Substituent Effects in TADF Emitters
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초록
내용
This study explores the synthesis of multi-carbazole-based thermally activated delayed fluorescence (TADF) molecules to enhance the efficiency of organic light-emitting diodes (OLEDs). The researchers developed two new TADF molecules based on a benzonitrile backbone, 4CzBN-BP and 4CzBN-ICz, by incorporating ortho-biphenyl and ortho-indolocarbazole, respectively, to improve triplet harvesting efficiency. The synthesis was primarily achieved through Suzuki coupling reactions and Buchwald coupling reactions, and the synthesized molecules exhibited excellent thermal stability and photophysical properties. This study provides an in-depth analysis of the energy transfer mechanisms between triplet and singlet states in the design and synthesis of TADF molecules, offering potential pathways to maximize OLED efficiency.