Optical and electrical properties of arylenevinylene compounds thin films prepared by vacuum evaporation

Rasoga, Oana; Vacareanu, Loredana; Grigoraş, Mircea; Enculescu, Monica; Socol, Marcela; Stanculescu, Florin; Ioniţă, Iulian; Stănculescu, Anca

doi:10.1016/j.synthmet.2011.10.001

Cited by 7 publications

(25 citation statements)

References 32 publications

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“…Some recent works have emphasised that symmetrically substituted organics D--D with donating groups situated at the ends linked by conjugated bridges, similar to those mentioned above, show important advantages, among which the large TPA cross-section [33,34] and high transmission in visible range sustaining the generation of significant ONL phenomena. Two arylenevinylene oligomers, L78 and L13, have been synthesised by Witting condensation using the following starting reagents: 4-formyltriphenylamine and N-hexyl-3-formylcarbazole and phosphonium salt of 1,4-bis(chloromethyl)benzene [31,35]. The chemical structure of the synthesised trans-arylenevinylene oligomers L78 and L13 has been evidenced correlating the FTIR measurements data presented in Figure 8 and Raman measurements data presented in Figure 9.…”

Section: Thin Films Based On Arylenevinylene Compoundsmentioning

confidence: 70%

“…In carbazole-based compounds like L13, supplementary peaks attributed to C carbazole -N stretches appeared at: 1123 cm -1 , 1132 cm -1 and 1230 cm -1 [36]. The Raman spectra show most of the sharp narrow welldefined peaks in spectral range 900-1750 cm -1 and are determined by scattering on the internal vibration modes [31].…”

Section: Optoelectronics -Materials and Devicesmentioning

confidence: 99%

“…By the combination of these aromatic amines showing hole transporting properties with vinyl segments with strong emissive properties, a new class of electroactive conjugated materials can be generated. The tertiary amine units are not interrupting the conjugation of the principal chain in these compounds, the pair of electrons of the nitrogen atom contributing to the increase in effective conjugation and the double vinyl bonds creating 'conjugated bridges' between the aromatic units [31,32].…”

Section: Thin Films Based On Arylenevinylene Compoundsmentioning

confidence: 99%

“…Two arylenevinylene oligomers, L78 and L13, have been synthesised by Witting condensation using the following starting reagents: 4-formyltriphenylamine and N-hexyl-3-formylcarbazole and phosphonium salt of 1, 4-bis(chloromethyl)benzene [31,35].…”

Section: Thin Films Based On Arylenevinylene Compoundsmentioning

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 Arylenevinylene Compoundsmentioning

confidence: 70%

Section: Optoelectronics -Materials and Devicesmentioning

confidence: 99%

Section: Thin Films Based On Arylenevinylene Compoundsmentioning

confidence: 99%

Section: Thin Films Based On Arylenevinylene Compoundsmentioning

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 electrical properties of the structures prepared with single polymeric and polymer:C 60 mixed active layers have been evaluated drawing the I-V characteristics using a SouceMeter Keithley 2400 [21,22] and a measurement geometry with four wires in direct contact with the Al electrode for eliminating the effect of the contacts. The Al contacts with area of ~0.52 cm 2 have been deposited by vacuum evaporation with a Kurt J. Lesker "SPECTROS" system.…”

Section: Page 7 Of 45mentioning

confidence: 99%

MAPLE prepared heterostructures with arylene based polymer active layer for photovoltaic applications

Stanculescu

Rasoga

Catargiu³

et al. 2015

Applied Surface Science

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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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Optical and electrical properties of arylenevinylene compounds thin films prepared by vacuum evaporation

Cited by 7 publications

References 32 publications

Organic Semiconductors for Non-Linear Optical Applications

Organic Semiconductors for Non-Linear Optical Applications

MAPLE prepared heterostructures with arylene based polymer active layer for photovoltaic applications

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

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