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Study the Nonlinearity Characteristics of Organic-Semiconductor (CuPc) Prepared Via Pulsed Laser Deposition Technique with Different Thickness
摘要： The optical absorption spectrum, Photoluminesces, and non-linear optical properties for Copper Phthalocyanine (CuPc) thin films (150,300 and 450 nm) respectively have been investigated via pulsed laser deposition technique. The absorption spectrum indicted that there are two bands one in UV around 330 nm which called B-band and the second in Visible around 650nm which called Q-band. Photoluminescence spectrum related to deposit samples has been determined with different thicknesses. From closed and open aperture Z-scan data non-linear absorption coefficient and non-linear refractive index have been calculated respectively using He-Ne laser which have beam waist of (24.2 μm), wave-length of (632.8 nm) and Rayleigh thickness was 2.9 mm. Through dividing closed by open apertures, non-linear refractive index was calculated accurately. Finally, the study also showed the suitability of the deposited films as an optical limiter at the wavelength 632.8 nm.
关键词： Copper Phthalocyanine,Organic Semiconductor,Non-linear properties,Pulsed laser deposition
更新于2025-09-16 10:30:52
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Phase transition induced spectral tuning of dual luminescent crystalline zinc-phthalocyanine thin films and OLEDs
摘要： We analyze the impact of the first order structural phase transition between the a- and b-phases in crystalline zinc-phthalocyanine thin films on their luminescent behavior. Upon optical excitation, two intensity maxima governing the dual fluorescence can be attributed to thin film excimer emission of the a-phase at 930 nm and bulk Frenkel exciton emission of the corresponding b-phase at 780 nm. Comprehensive temperature and time dependent studies on the structural phase transition reveal a controllable shift of spectral weight between these two maxima. Applying this approach to thin film devices, we demonstrate the preparation of dual luminescent organic light emitting diodes with tunable emission characteristics in the near infrared, which are of interest as electro-optical units in future hybrid photonic devices.
关键词： phase transition,zinc-phthalocyanine,spectral tuning,OLEDs,thin films
更新于2025-09-16 10:30:52
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Unsymmetrically pyrazole-3-carboxylic acid substituted phthalocyanine-based photoanodes for use in water splitting photoelectrochemical and dye-sensitized solar cells
摘要： A new photosensitizer, PCA-ZnPc-2, was synthesized through the asymmetric functionalization of phthalocyanine ring with a pyrazole-3-carboxylic acid as the electron-withdrawing and anchoring group and six hexylsulfanyl as the bulky electron-donating groups. PCA-ZnPc-2 was tested in dye-sensitized solar cells (DSSCs) and its performance was compared with PCA-ZnPc-1. It was found that PCA-ZnPc-2 has higher electron-donating ability which is favorable for light harvesting and suppress the dye aggregation on TiO2 when compared to PCA-ZnPc-1. Also, the new photosensitizer was used in dye-sensitized photoelectrochemical cells for hydrogen production under visible irradiation. The results show that PCA-ZnPc-2 is a promising photosensitizer to harvest the red/near-IR regions.
关键词： Dye-sensitized solar cells,Photoelectrochemical hydrogen production,Pyrazole-3-carboxylic acid,Phthalocyanine
更新于2025-09-12 10:27:22
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BODIPY Substituted Zinc(II) Phthalocyanine and Its Bulk Heterojunction Application in the solar cells
摘要： A novel asymmetrical zinc(II) phthalocyanine-BODIPY conjugate (ZnPc-BODIPY) bearing three iodine directly substituted to the macrocycle and one BODIPY connected to macrocycle with amide bond was synthesized by the reaction of carboxylic acid substituted asymmetrical zinc(II) phthalocyanine (ZnPc) with BODIPY derivative bearing amino group (BODIPY-NH2). This conjugate was fully characterized by spectroscopic methods (FT-IR, UV-Vis, 1H NMR, 11B NMR, 19F NMR and mass) and elemental analysis. The fluorescence behavior of ZnPc-BODIPY was studied for determination of energy transfer process. The voltammetry measurements (CV and SWV) were performed for specifying of the HOMO-LUMO energy levels and band gaps of ZnPc-BODIPY and starting compounds ZnPc and BODIPY-NH2 for comparison. In addition, the band gaps of these compounds were also determined by UV-Vis absorption onset (λonset) and theoretical calculations. Bulk heterojunction solar cell containing ZnPc-BODIPY were fabricated in the structure of ITO/PEDOT:PSS/ZnPc-BODIPY:PCBM/Al. The photovoltaic parameters of the solar cell were obtained and ZnPc-BODIPY conjugate was found to bring spectral contribution to IPCE at a peak of 510 nm.
关键词： BODIPY,Organic solar cell,Suzuki coupling,Phthalocyanine
更新于2025-09-12 10:27:22
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Excellent ambipolar gas sensing response of Eu[Pc(OC4H9)8]2/acidified multiwalled carbon nanotubes hybrid at room temperature
摘要： A new hybrid material has been developed by mixing a sandwich-type double-decker, Eu[Pc(OC4H9)8]2 = 2,3,9,10,16,17,23,24-octabutoxyphthalocyaninate] with acidified multiwalled carbon nanotubes (aMWCNTs) through non-covalent interactions. The UV-vis spectrum, X-ray diffraction and scanning electron microscope have been employed to reveal the J-aggregate mode and optimized morphology of Eu[Pc(OC4H9)8]2 molecules in the Eu[Pc(OC4H9)8]2/aMWCNTs hybrid material. The gas-sensing devices based on this hybrid material are fabricated by a simple solvent-processing quasi-Langmuir–Sh?fer (QLS) progress. The n-type and p-type response is shown by the Eu[Pc(OC4H9)8]2/aMWCNTs hybrid film at room temperature. The detection limit of the hybrid for ammonia and nitrogen dioxide gas is 0.5 ppm and 0.3 ppm, respectively.
关键词： phthalocyanine,gas sensing,multiwall carbon nanotubes,ambipolar organic semiconductor,europium complex
更新于2025-09-12 10:27:22
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A study of the influence of plasmonic resonance of gold nanoparticle doped PEDOT: PSS on the performance of organic solar cells based on CuPc/C60
摘要： This work studied the role of gold nanoparticles (AuNPs) with different spherical sizes mixed with poly (3, 4-ethylene dioxythiophene): polystyrene sulfonate (PEDOT: PSS) as a hole transfer layer to enhance the efficiency (ITO/PEDOT:PSS (AuNPs)/CuPc/C60/Al) organic photovoltaic cell (OPV). AuNPs were synthesized using the thermochemical method and the results of the transmission electron microscope (TEM) images showed that the gold nanoparticles mostly dominated by spherical shapes and sizes were calculated in the range (12–23 nm). Measurements of UV-VIS spectra for AuNPs have shown that the surface plasmon resonance shifted to a higher wavelength with decreasing the particle size. Surface morphology and absorption spectra of OPV cells were studied using atomic force microscope and UV-VIS spectrometer techniques. The efficiency of the OPV cell was calculated without and with AuNPs. Efficiency was increased from 0.78% to 1.02% due to the embedded of AuNPs with (12 nm) in PEDOT/PSS. The increase in the light absorption in CuPc is due to the good transparent conducting of PEDOT:PSS and the increase in the electric field around AuNPs embedded in PEDOT:PSS and inbuilt electric field at the interfacial between CuPc and C60 is due to the surface plasmon resonance of AuNPs. The increase in these two factors increase the exciton generation in CuPc, dissociation at the interfacial layer, and charge carrier transfer which increases the collection of electrons and holes at cathode and anode.
关键词： Copper phthalocyanine,PEDOT:PSS,Solar cell,Gold nanoparticles,Materials chemistry,Fullerene,Materials science
更新于2025-09-11 14:15:04
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Study of Photovoltaic Devices with Hybrid Active Layer
摘要： The aim of this work is to present the influences of composition of the material and manufacturing technology conditions of the organic photovoltaics devices (OPv) with the organic and hybrid bulk heterojunction on the active layers properties and cells performance. The layers were produced by using small molecular compounds: the metal-phthalocyanine (MePc) and perylene derivatives (PTCDA) and the titanium dioxide (TiO2) nanoparticles. Two kinds of metal phthalocyanines (NiPc, TiOPc) were used as donor material and pperylenetetracarboxylic dianhydride (PTCDA) as an acceptor. The used manufacturing technique allowed to employ thin layers of materials in a fast deposition process. Bulk heterojunction was created by simultaneously applying the MePc:PTCDA materials during the evaporation of the components mixture. The research was based on the estimate of composition of bulk heterojunction, the examination of the surface morphology of the used layers and optical properties studies of the heterojunction and its implementation to photovoltaic architecture. The produced photovoltaic cells parameters were determined on the basis of current - voltage characteristics. The researches of structure of obtained layers were conducted by using scanning electron microscope (SEM) and transmission electron microscopy (TEM). The quantitative determination of surface topography by determining RMS and Ra coefficients were performed by atomic force microscopy (AFM). In order to determine the optical properties of the films the UV-Visible spectroscope have been utilized. Current - voltage characteristics were employed to determine the basic photovoltaic parameters using a dedicated device. The paper describes the influence of the individual components sharing the bulk heterojunction on its structure, optical properties and morphology of surface. In addition it allows for linking active layers properties with the parameters of the photovoltaic cells. The obtained results suggest the possibility of developing the utilized materials and technology in the further works on photovoltaic structures.
关键词： metal-phthalocyanine,titanium dioxide nanoparticles (TiO2),organic photovoltaics devices (OPv),perylene derivatives
更新于2025-09-11 14:15:04
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Colour removal of phthalocyanine based reactive dye by nanoparticles
摘要： Synthesized iron-nickel (Fe–Ni) bimetallic nanoparticles (NPs) were utilized for the colour removal of C. I. Reactive Blue 21 (RB21) dye. NPs agglomeration was prevented using polyvinyl pyrrolidone (PVP) as capping agent. The NPs were characterized by nanoparticle size analysis, TEM, XRD and EDX. The operational conditions like pH, NPs concentration and initial dye concentration for decolourization were optimized using mathematical modelling and its kinetics were studied. Influence of the presence of alkali and salt on dye decolourization was also investigated. Decolourization products were analysed by using FTIR and GCMS analysis. 93.46% of dye decolourization was obtained and reduction in COD, BOD values was achieved along with minimal sludge generation.
关键词： bimetallic,phthalocyanine,kinetics,mathematical modelling,Reactive Blue 21
更新于2025-09-11 14:15:04
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Synthesis and Self-Assemble Nanofibers of Tetra Phenoxy Substituted Nickel Phthalocyanine
摘要： Tetra phenoxy substituted nickel phthalocyanine nanofibers were synthesized in large scale by self-assemble. The FESEM and HRTEM micrographs indicated that the sizes of the fibers are 20-60 nm in width and 0.2-5 μm in length. The formation mechanism of nickel phthalocyanine fibers was discussed and studied by XRD and UV-visible spectra. The nickel phthalocyanine nanofibers have potential application on organic function devices.
关键词： Nickel phthalocyanine,Nanofibers,Synthesis,Self-assemble
更新于2025-09-11 14:15:04
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Simple model of the ground state and spin-orbital excitations of free and adsorbed Fe(II) phthalocyanine molecules
摘要： We investigate the ground state and low-energy spin-orbital excitations of a single iron(II) phthalocyanine molecule in isolation and on an oxidized Cu(110) surface. Considering the subspace spanned by the three lowest spin-triplet states of 3A2g and 3Eg symmetry, we diagonalize the Hamiltonian made of the anisotropic spin-orbit interaction and the ligand ?eld splitting (cid:2), de?ned as the energy difference between 3Eg and 3A2g. We ?nd that the ground state switches from a 3Eg-like state with large orbital moment and out-of-plane easy axis for (cid:2) < ?60 meV to a 3A2g-like singlet state with in-plane easy axis for (cid:2) > ?60 meV. The analysis of the ?rst excited states in the two regimes explains the zero-?eld splitting data reported for β-FePc as well as for FePc molecules adsorbed on an oxidized Cu(110) surface [N. Tsukahara et al., Phys. Rev. Lett. 102, 167203 (2009)]. Importantly, the calculated magnetic susceptibility obtained with the ab initio value (cid:2) = 93 meV compares remarkably well with the experimental data of β-FePc in the whole available temperature range of 1–300 K.
关键词： spin-orbital excitations,anisotropic spin-orbit interaction,oxidized Cu(110) surface,Fe(II) phthalocyanine,ligand ?eld splitting
更新于2025-09-10 09:29:36