A5077772089- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Luminescence and Fluorescent Materials
- Perovskite Materials and Applications
- Thin-Film Transistor Technologies
- Molecular Junctions and Nanostructures
- Electrocatalysts for Energy Conversion
- Semiconductor materials and devices
- Catalytic Cross-Coupling Reactions
Kaunas University of Technology
2021-2023
Self-assembled molecules (SAMs) have been widely employed as hole transport layers (HTLs) that can improve the power conversion efficiency (PCE) of perovskite solar cells (PSCs). However, few SAMs are effective for wide band gap (WBG; Eg = 1.77 eV) PSCs. We found [3-[4-(diphenylamino)phenyl]-9H-carbazol-9-yl]propylphosphonic acid (4dp3PACz) working a monomolecular HTL is WPG (FA0.8Cs0.2PbI1.8Br1.2) The 4dp3PACz improved quality film and reduced defect density film, which nonradiative...
Further improvement of the performance and stability inverted perovskite solar cells (PSCs) is necessary for commercialization. Here, ferrocene derivative dibenzoylferrocene (DBzFe) used as an additive to enhance MA- Br- free PSCs. The results show that introduction DBzFe not only passivates defects in film but also inhibits ion migration film. final device achieves a power conversion efficiency (PCE) 23.53%, which one highest efficiencies currently based on self-assembled monolayers (SAMs)....
In this work, a novel series of phenothiazine and phenoxazine substituted fluorene core-based solution-processable nanotextured HTMs was reported. Of these, the material showed superior performance in phosphorescent yellow TADF green OLEDs.
Solution-processable bipolar materials acting as hosts, soluble in common organic solvents, are key for thermally activated delayed fluorescence (TADF) emitters.
This report is on the efficiency enhancement of wide bandgap lead halide perovskite solar cells (WBG Pb-PVK PSCs) consisting FA0.8Cs0.2PbI1.8Br1.2 as light-harvesting layer. WGB PSCs have attracted attention top layer all perovskite-tandem cells. Poly[bis(4-phenyl) (2,4,6-trimethylphenyl) amine] (PTAA), a conductive polymer, always used hole transporting (HTL) for PSCs. Nevertheless, hydrophobic surface PTAA sometimes destroys growth film. On other hand, Fermi level not well matched with...
Organic light-emitting diodes (OLEDs) have revolutionized the world of technology, making significant contributions to enhancing our everyday lives. With their exceptional display and lighting capabilities, OLEDs become indispensable in various industries such as smartphones, tablets, televisions, automotives. They emerged a dominant inspiring continuous advancements, improvements. Taking inspiration from remarkable advancements OLED we successfully developed naphtalimide-based compounds,...
Well-defined electroactive bipolar derivatives of new structure have been synthesized from 3-(N,N-diphenylamino)-9H-carbazole and bis(4-fluorophenyl)sulfone, 4-fluorophenylsulfone or 4,4′-difluorobenzophenone, respectively. The full characterization their is described. amorphous materials with very high glass transition temperatures 111–173 °C also possess thermal stability, onset decomposition 351–398 °C. Some the compounds having best solubility were tested as emitters dispersed in...
Novel oxetane-functionalized derivatives were synthesized to find the impact of carbazole substituents, such as 1-naphtyl, 9-ethylcarbazole and 4-(diphenylamino)phenyl, on their thermal, photophysical electrochemical properties. Additionally, obtain optimized ground-state geometry distribution frontier molecular orbital energy levels, density functional theory (DFT) calculations used. Thermal investigations showed that obtained compounds are highly thermally stable up 360 °C, glasses with...
Molecules that use triphenylethene-carbazole moieties decorated with different substitutions were designed and synthesized, harvesting wide energy bandgaps aggregation-induced emission (AIE) characteristics. The photophysical, thermal, electroluminescence (EL) characteristics of the emitters investigated to clarify molecular structure-property-performance relationship. photoluminescence spectra synthesized molecules measured using tetrahydrofuran-water solution presented strong blue...
2,7-Di(4-biphenyl)-9,9-dihexylfluorene was synthesized by a multi-step synthetic rout. The material characterized proton nuclear magnetic resonance (1H NMR) spectroscopy, mass spectrometry, differential scanning calorimetry and thermogravimetric analyses. electro-active derivative could form thin amorphous films tested as solution processed hole transporting layers in organic light- emitting diode with Alq3 an emitter, which also has served electron material. prepared electroluminescent...