A5058864238- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Luminescence and Fluorescent Materials
- Synthesis and properties of polymers
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Thin-Film Transistor Technologies
- Green IT and Sustainability
- Perovskite Materials and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Advanced Sensor and Energy Harvesting Materials
- Quantum Dots Synthesis And Properties
- Nanomaterials and Printing Technologies
- Fluorine in Organic Chemistry
- Electrochemical Analysis and Applications
- Polydiacetylene-based materials and applications
- Image and Video Quality Assessment
- Machine Learning in Materials Science
- Molecular Sensors and Ion Detection
Purdue University West Lafayette
2023-2024
Korea University
2020-2022
Government of the Republic of Korea
2021
Seoul Institute
2020
Accurate and reliable prediction of the optical photophysical properties organic compounds is important in various research fields. Here, we developed deep learning (DL) spectroscopy using a DL model experimental database to predict seven compounds, namely, absorption peak position bandwidth, extinction coefficient, emission photoluminescence quantum yield (PLQY), lifetime. Our included chromophore–solvent interaction account for effect local environments on was trained an 30 094...
Transparent conductors (TCs) play a vital role in displays, solar cells, and emerging printed electronics. Here, we report solution-processable n-doped organic conductor from copper-catalyzed cascade reactions the air, which involves oxidative polymerization reductive doping one pot. The formed polymer ink is shelf-stable over 20 days can endure storage temperatures -20 to 65 °C. optimized thin-film TC exhibits low sheet resistance of 45 Ω/sq high transmittance (T550 > 80%), rival indium tin...
Abstract Organic light‐emitting diodes (OLEDs) have garnered increasing attention as a promising candidate for application in next‐generation displays and solid‐state lighting devices. The doping technique commonly used to fabricate layers (EMLs) of OLEDs disperses the emitting material host matrix mitigate aggregation‐induced quenching (ACQ). Alternatively, owing their high efficiency ease manufacture, nondoped been developed substitute doped OLEDs. When fabricating OLEDs, it is essential...
Abstract The highest occupied molecular orbital (HOMO) and lowest unoccupied (LUMO) energies, which are key factors in optoelectronic devices, must be accurately estimated for newly designed materials. Here, we developed a deep learning (DL) model that was trained with an experimental database containing the HOMO LUMO energies of 3026 organic molecules solvents or solids capable predicting mean absolute errors 0.058 eV. Additionally, demonstrated our DL efficiently used to virtually screen...
Abstract Recently, solution‐processable n‐doped poly(benzodifurandione) (n‐PBDF) has been made through in‐situ oxidative polymerization and reductive doping, which exhibited exceptionally high electrical conductivities optical transparency. The discovery of n‐PBDF is considered a breakthrough in the field organic semiconductors. In initial report, possibility structural defect formation was proposed, based on observation isomerization from ( E )‐2H,2′H‐[3,3′‐bibenzofuranylidene]‐2,2′‐dione...
In this study, we demonstrated two deep-blue TADF emitters, BO-tCzPhICz and BO-tCzDICz, for solution-processable thermally activated delayed fluorescence organic light-emitting diodes (TADF-OLEDs). They were synthesized by employing an organoboron acceptor 9-(3,6-di-tert-butyl-9H-carbazol-9-yl)-5-phenyl-5,12-dihydroindolo[3,2-a]carbazole (tCzPhICz) 12-(3,6-di-tert-butyl-9H-carbazol-9-yl)-15H-diindolo[2,3-b:1',2',3'-lm]carbazole (tCzDICz) as bulky aryl-annulated [3,2-a] carbazole donors,...
Three V-shaped host molecules with a cyclohexane linker were successfully synthesized for thermally activated delayed fluorescence organic light-emitting diodes (TADF-OLEDs). The unipolar molecules, BBCzC and BTDC, contained two 9-phenyl-9H-3,9'-bicarbazole (PBCz) moieties 2,12-di-tert-butyl-7-phenyl-5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracene (PDBNA) moieties, respectively. BCzTC, bipolar molecule, consisted of donor unit, PBCz, an acceptor PDBNA, connected by linker. showed good...
Two bipolar hosts as structural isomers were designed and synthesized for solution-processable green TADF-OLEDs. Corresponding devices showed excellent EQE over 21% low efficiency roll-off.
Organic polymers that exhibit features pertinent to functioning as host materials for thermally activated delayed fluorescence (TADF) emitters have considerable potential in solution-processable organic light-emitting diodes (OLEDs), allowing simple, low-cost, and large-area applications. In particular, polymer hosts superior characteristics, including facile functionality introduce various electron donor acceptor entities, the ability uniformly disperse contain small molecular dopants,...
Recently, various host materials have been developed for solution-processed thermally activated delayed fluorescent organic light-emitting diodes (TADF-OLEDs). Compared with small-molecule hosts, polymeric hosts are advantageous inducing a uniform distribution and segregation of dopant molecules in the emissive layer without undesired large-scale phase separation. In this study, new polymer were demonstrated, which bipolar conjugative moiety consisting carbazole (Cz) donor an α-carboline...
Two novel polymeric host materials, <bold>P(NmCP)</bold> and <bold>P(mCP)</bold>, were synthesized, high-performing sky-blue green thermally activated delayed fluorescence organic light-emitting diodes achieved.
New polystyrene-based polymers with high π-extended hole transport pendants were synthesized to obtain a low turn-on voltage and efficiency in solution-processed green TADF-OLEDs.
We synthesized a novel hole transporting polymer (P-CzAc) for solution-processable green QD-LEDs. Compared to PVK, the P-CzAz-based device showed higher performance.
Abstract Recently, solution‐processable n‐doped poly(benzodifurandione) (n‐PBDF) has been made through in‐situ oxidative polymerization and reductive doping, which exhibited exceptionally high electrical conductivities optical transparency. The discovery of n‐PBDF is considered a breakthrough in the field organic semiconductors. In initial report, possibility structural defect formation was proposed, based on observation isomerization from ( E )‐2H,2′H‐[3,3′‐bibenzofuranylidene]‐2,2′‐dione...
n-Doped poly(benzodifurandione) (n-PBDF) is an n-type conducting polymer with characteristics such as high electrical conductivity, solution processability, and weathering stability. Here, we systematically investigate the structure property relationship on impact of structural modifications through aromatic substitution photophysical, electrical, properties n-PBDF its oligomeric derivatives. We demonstrated that electron donation group (methyl) raised highest occupied molecular orbital...
Substantial effort has been dedicated to the development of solution-processed flexible organic light-emitting diodes (sf-OLEDs). However, simultaneously enhance device performance and ensure stable operation under severe mechanical deformation, highly transparent electrodes efficient soluble emitting materials must be optimized together. Here, highly-efficient green-emitting thermally activated delayed fluorescence (TADF) sf-OLEDs were developed using a mesh-structured Ni-doped indium zinc...