21 research outputs found
Copper(II) Etioporphyrinate as a Promising Photoluminescent and Electroluminescent Temperature Sensor
No full textLuminescent temperature sensors are of great interest because they allow remote determination of temperature in transparent media, such as living tissues, as well as on scattering or transparent surfaces of materials. This study analyzes the luminescent properties of copper(II) etioporphyrinate (Cu-EtioP) in a polystyrene film upon variation of temperature from −195 °C to +65 °C in a cryostat. It is shown that the ratio of intensities of phosphorescence transitions in the red spectral region of such a material varies significantly, that is, the material has thermosensory properties. The phosphorescence decay curves of copper(II) etioporphyrinate in a polystyrene film are analyzed. The quantum yield of phosphorescence of copper(II) etioporphyrinate determined by the absolute method was 3.15%. It was also found that the electroluminescence (EL) spectra of copper(II) etioporphyrinate in a poly(9-vinylcarbazole) (PVK) matrix demonstrated a similar change in the spectra in the temperature range −3 °C to +80 °C. That is, copper(II) etioporphyrinate can also be used as a luminescent temperature sensor as part of an active OLED layer
Electrical Excitation of Long-Range Surface Plasmons in PC/OLED Structure with Two Metal Nanolayers
No full textA current-driven source of long-range surface plasmons (LRSPs) on a duplex metal nanolayer is reported. Electrical excitation of LRSPs was experimentally observed in a planar structure, where an organic light-emitting film was sandwiched between two metal nanolayers that served as electrodes. To achieve the LRSP propagation in these metal nanolayers at the interface with air, the light-emitting structure was bordered by a one-dimensional photonic crystal (PC) on the other side. The dispersion of the light emitted by such a hybrid PC/organic-light-emitting-diode structure (PC/OLED) comprising two thin metal electrodes was obtained, with a clearly identified LRSP resonance peak.LPM
Slot-Die-Printed Two-Dimensional ZrS3Charge Transport Layer for Perovskite Light-Emitting Diodes
No full textLiquid-phase exfoliation of zirconium trisulfide (ZrS3) was used to produce stable and ready-to-use inks for solution-processed semiconductor thin-film deposition. Ribbon-like layered crystals of ZrS3 were produced by the chemical vapor transport method and were then exfoliated in three different solvents: dimethylformamide, ethanol, and isopropyl alcohol. The resulting ZrS3 dispersions were compared for stability and the ability to form continuous films on top of the perovskite layer in light-emitting diodes with the ITO/PEDOT:PSS/MAPbBr3/2D-ZrS3/LiF/Al structure. Film deposition was performed by using either spray or slot-die coating methods. The slot-die coating route proved to produce better and more uniform films with respect to spray coating. We found that the 2D ZrS3 electron injection layer (EIL) stabilized the interface between the perovskite and LiF/Al cathode, reducing the turn-on voltage to 2.8 V and showing a luminance that does not degrade during voltage sweep. On the other hand, EIL-free devices show electroluminescence on the first voltage sweep that reduces almost to zero in the subsequent sweeps. Combining physical device simulation and density functional theory calculation, we are able to explain these results in terms of lowering the electron injection barrier at the cathode
METHOXY-SUBSTITUTED NAPHTHOTHIOPHENES – SINGLE MOLECULES' VS. CONDENSED PHASE PROPERTIES AND PROSPECTS FOR ORGANIC ELECTRONICS APPLICATIONS
Get PDFIn this work, a series of tricyclic naphthothiophenes – photocyclization products (8- methoxynaphtho[1,2-b]thiophene (1a); 6,7-dimethoxynaphtho[1,2-b]thiophene (1b); 8- methoxynaphtho[2,1-b]thiophene (2a) have been studied. All compounds possessing similar structures demonstrated the close optical, electrochemical characteristics. Spectroelectrochemical investigation showed that 1b and 2a are able to form stable radical particles at 1.55 V. In case of 1a, the formed at 1.55 V radical is short-living
Photoconduction and Electroluminescence of Copper (II) Protoporphyrin and Chlorin Cu-C-e6
No full textCu (II) protoporphyrin Cu-PP-IX and chlorin Cu-C-e6 were found to have both thin solid film formation and charge carrier transport abilities. In the layers deposited by resistive thermal evaporation, the mobilities of holes and electrons are on the order of 10−5 cm2 V−1 s−1. Organic light-emitting diodes incorporating the dye molecules as emitting dopants demonstrate electroluminescence in the UV and near-IR ranges
Tris(ethylene diamine) nickel acetate as a promising precursor for hole transport layer in planar structured perovskite solar cells
No full textNiO/perovskite interface with novel NiO precursor was investigated with Auger profiling for solar cell with PCE > 15%.</p
Effect of Cp‐Ligand Methylation on Rhodium(III)‐Catalyzed Annulations of Aromatic Carboxylic Acids with Alkynes: Synthesis of Isocoumarins and PAHs for Organic Light‐Emitting Devices
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