Sungkyunkwan University · Engineering
Professor Seung Soo Yoon's research lab specializes in the design and synthesis of advanced organic semiconductors for optoelectronic applications, with a primary focus on thermally activated delayed fluorescence (TADF) emitters and blue-light-emitting materials for organic light-emitting diodes (OLEDs). The lab explores molecular engineering strategies—such as asymmetric molecular architecture, donor-acceptor engineering, and end-capping with silane or fluorene units—to achieve high-efficiency, stable blue emission. Their work also extends into the development of synthetic receptors and peptide-binding molecules, demonstrating interdisciplinary expertise in molecular recognition and functional materials.
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In this study, we synthesized and characterized multiple resonance (MR) type blue thermally activated delayed fluorescence (TADF) emitters. Unlike many boron-based MR-TADF materials, the blue TADF emitters of this work had an asymmetric molecular structure with one boron, one oxygen, and one nitrogen. The aromatic units linked to the nitrogen were changed into diphenylamine, carbazole, dimethylacridine, and diphenylacridine to manage the light emission properties of the emitters. The TADF emitte
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAn exceptional synthetic receptor for peptidesSeung Soo Yoon and W. Clark StillCite this: J. Am. Chem. Soc. 1993, 115, 2, 823–824Publication Date (Print):January 1, 1993Publication History Published online1 May 2002Published inissue 1 January 1993https://pubs.acs.org/doi/10.1021/ja00055a083https://doi.org/10.1021/ja00055a083research-articleACS PublicationsRequest reuse permissionsArticle Views334Altmetric-Citations91LEARN ABOUT THESE METRICSArticle Vie
Abstract Blue fluorescent materials based on silicone end‐capped 2‐diphenylaminofluorene derivatives are synthesized and characterized. These materials are doped into a 2‐methyl‐9,10‐ di ‐[2‐naphthyl]anthracene host as blue dopant materials in the emitting layer of organic light‐emitting diode devices bearing a structure of ITO/DNTPD (60 nm)/NPB (30 nm)/emitting layer (30 nm)/Alq 3 (20 nm)/LiF (1.0 nm)/Al (200 nm). All devices exhibit highly efficient blue electroluminescence with high external
A series of anthracene derivatives with a triphenylsilane end-capping group, (9,9-dimethyl-2-(10-phenylanthracen-9-yl)-9H-fluoren-7-yl)triphenylsilane (PAFTPS), 9,10-bis(9,9-dimethyl-2-(triphenylsilyl)-9H-fluoren-7-yl)anthracene (BFPSA), (9,9-dimethyl-2-(9,10-diphenylanthracen-2-yl)-9H-fluoren-7-yl)triphenylsilane (DPA-2FTPS), and (9,10-eiphenylanthracen-2-yl)triphenylsilane (DPA-2TPS), have been designed, synthesized, and characterized. A device incorporating PAFTPS as the emissive layer exhibi
A dye-labeled variant of a highly substrate-selective synthetic receptor for peptides is described and its binding selectivity for certain di- and tripeptide sequences is elucidated using an encoded combinatorial library.
A series of tert-butylated spirofluorene derivatives incorporating a diphenylaminoaryl-vinyl group was synthesized via the Horner–Wadsworth–Emmons olefination and a Suzuki cross-coupling reaction. To examine the electroluminescent properties of these materials, multilayered OLEDs were fabricated into the following device structure: ITO/DNTPD/NPB/MADN:blue dopant materials 1–14/Alq3/Liq/Al. All devices showed efficient blue emission. In particular, one device exhibited highly efficient sky blue e
Blue fluorescent materials with a 2-(diphenylamino)fluoren-7-ylvinylarene emitting unit and tert-butyl-based blocking units were synthesized. The photophysical properties of these materials, including UV/Vis absorption, photoluminescent properties, and HOMO-LUMO energy levels, were characterized and rationalized with quantum-mechanical DFT calculations. The electroluminescent properties of these molecules were examined through the fabrication of multilayer devices with a structure of indium-tin
Red phosphorescent iridium(III) complexes based on fluorine-, phenyl-, and fluorophenyl-substituted 2-arylquinoline ligands were designed and synthesized. To investigate their electrophosphorescent properties, devices were fabricated with the following structure: indium tin oxide (ITO)/4,4',4''-tris[2-naphthyl(phenyl)amino]triphenylamine (2-TNATA)/4,4'-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (NPB)/4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP): 8% iridium (III) complexes/bathocuproine (BCP)/tris(8
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