Preparation and Characterization of Polar Aniline Functionalized Copolymers Thin Films for Optical Non-Linear Applications

Stănculescu, Anca; Rasoga, Oana; Preda, N.; Socol, Marcela; Stanculescu, Florin; Ioniţă, Iulian; Albu, Ana‐Maria; Socol, G.

doi:10.1080/00150190902993291

Cited by 21 publications

(40 citation statements)

References 16 publications

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“…The amidic derivatives monomers with the chemical structure presented in Figure 17 The synthesis has implied the opening of the anhydridic cycle in dimethylformamide (DMF) at room temperature (A1, A2, A3, A5 and A6) and at higher temperature, 50 ο C, (A7) under weak stirring for 2 hours. The monomers have precipitated in ice and have been separated by filtration and recrystallisation from methanol [29].…”

Section: Thin Films Based On Maleimidic Derivativesmentioning

confidence: 99%

“…synthesis has implied the opening of the anhydridic cycle in dimethylformamide (DMF) at ro temperature (A1, A2, A3, A5 and A6) and at higher temperature, 50  C, (A7) under weak stirring f hours. The monomers have precipitated in ice and have been separated by filtration recrystallisation from methanol [29]. The strong acceptor character of the two [-NO 2 -] substituent groups compared to donor character of [-N NH-] group determines the high polarity of the molecules in monomers (A6) and (A7) molecules.…”

Section: Thin Films Based On Maleimidic Derivativesmentioning

confidence: 99%

“…Thin films of the selected monomers, presented in Figure 17, have been prepared by MAPLE, this method assuring a better control of the film thickness by the number of pulses, surface morphology by the fluence, amplified adhesion film/substrate and elimination of the possible source of contamination because it is a non-contact procedure which can be integrated with other non-contaminant processes [29]. For the preservation of molecular structure and deposition of clean films low fluences of 350-430 mJ cm -2 and a dimethylsulphoxide (DMSO) matrix have been used.…”

Section: Monomeric Maleimidic Derivatives Thin Filmsmentioning

confidence: 99%

“…A special configuration presented in Figure 4 has been used for the excitation of ONL phenomena in organic materials samples both bulk crystals (mentioned above) and thin films (will be introduced later). The experimental set-up is based on an ultra short pulsed laser Spectra Physics 'Tsunami' characterised by a maximum wavelength of 800 nm, pulse duration of 60 fs, frequency of 80 MHz and medium power of 780 mW [29].…”

Section: Introductionmentioning

confidence: 99%

“…The excitation light is blocked and its effect is minimised with a NIR cut-off filter placed in front of the focalisation lens. The amplification of the CCD detector can be increased without the necessity to increase the signal at longer wavelengths [29].…”

Section: Introductionmentioning

confidence: 99%

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Organic Semiconductors for Non-Linear Optical Applications

Stănculescu¹,

Stanculescu²

2015

Optoelectronics - Materials and Devices

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The organic molecules represent a promising research field because they show special properties which are determined by the conjugated system of π electrons and the groups substituted to the aromatic nucleus offering perspectives for a large area of applications, including the non-linear optics.We have investigated two types of molecular crystalline material prepared from aromatic derivatives, meta-dinitrobenzene (m-DNB) and benzil (Bz), and three types of organic thin films prepared from arylenevinylene (triphenylamine, carbazole) compounds, maleimidic derivatives and anilinic derivatives functionalised copolymers using different methods (matrix-assisted pulsed laser evaporation, vacuum evaporation, spin coating). The effect of the experimental conditions on the morphological and structural particularities of the films has been emphasised. New results are bought about the systems formed from an aromatic derivative (m-DNB and benzil) crystal and inorganic (organic) dopant studied from the point of view of the dopant incorporation considering the stability of the growth interface and its effect on the optical band gap and optical non-linear (ONL) properties of the m-DNB and Bz crystals. The relationship between the morphology and structural order of the maleimidic derivatives monomers in polycarbonate matrix composite layer and the ONL properties is discussed. We analysed the correlation between the molecular structure of organic compound, particularities of the macroscopic order (influenced by the crystal growth and thin-film deposition methods) and optical non-linear (second harmonic generation, two-photon fluorescence) properties.The aromatic derivatives such as meta-dinitrobenzene (m-DNB) and benzil (Bz) are organic compounds of interest in preparing bulk crystal materials showing large transparency domain,

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Section: Thin Films Based On Maleimidic Derivativesmentioning

confidence: 99%

Section: Thin Films Based On Maleimidic Derivativesmentioning

confidence: 99%

Section: Monomeric Maleimidic Derivatives Thin Filmsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Organic Semiconductors for Non-Linear Optical Applications

Stănculescu¹,

Stanculescu²

2015

Optoelectronics - Materials and Devices

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Effect of heavy ions irradiation on the properties of benzil crystals

Stanculescu

Socol

Matei

et al. 2017

Crystal Research and Technology

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Thick slices mechanically polished cut from a pure benzil ingot grown from melt in a modified Bridgman-Stockbarger configuration were irradiated with Ni ions having a specific energy of 11.4 MeV/u at different fluences. The effect of radiation on the properties of bulk benzil has been investigated. The chemical structure was not substantially affected as shown by infrared spectrum. The changes induced on the disorder degree have been evaluated from the Urbach law and X Ray Diffraction measurements. The morphology and surface topography have been analyzed emphasising a decrease in the size of granules and an increase in the surface roughness by irradiation. No effect of irradiation on the photoluminescence emission and optical nonlinear properties has been evidenced. These results recommend benzil as candidate for applications in space technology.

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Organic Heterostructures with Indium‐Free Transparent Conductor Electrode for Optoelectronic Applications

Petre

Stănculescu

Gîrtan

et al. 2021

Physica Status Solidi (a)

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Herein, the properties of the organic heterostructures with triple‐layer ZnO/Ag/ZnO as a replacement for ITO and mixed layer containing arylenevinylene oligomer (based on triphenylamine or carbazole) donor and nonfullerene (perylene diimide) acceptor mixed in the ratio 1:2 and the effect of a buffer layer of PEDOT‐PSS intercalated between triple layer and mixed organic layer are discussed. The UV−vis transmission and photoluminescence (PL) properties are investigated in correlation with the surface topography and reveal a good match between the absorption and emission domain, which can favor the generation of the charge carriers. The heterostructure with the mixed layer based on triphenylamine oligomer shows the widest absorption domain, and the PL spectra of the heterostructures realized with either triphenylamine or carbazole oligomer show peaks corresponding to the radiative decay of the donor and acceptor. The I−V characteristics in the dark indicate a slightly nonlinear behavior and the current is affected by the charge carriers recombination on the defects present in the thick mixed layer deposited by matrix‐assisted pulsed laser evaporation. The effect of the PEDOT‐PSS buffer layer on the electrical properties of the organic heterostructure with ZnO/Ag/ZnO electrode is also investigated.

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Preparation and Characterization of Polar Aniline Functionalized Copolymers Thin Films for Optical Non-Linear Applications

Cited by 21 publications

References 16 publications

Organic Semiconductors for Non-Linear Optical Applications

Organic Semiconductors for Non-Linear Optical Applications

Effect of heavy ions irradiation on the properties of benzil crystals

Organic Heterostructures with Indium‐Free Transparent Conductor Electrode for Optoelectronic Applications

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