Optical and electrical properties of poly (N-vinylcarbazole)/graphene oxide nanocomposites for organic semiconductor devices

Goumri, Meryem; Hatel, Rhizlane; Ratier, Bernard; Baïtoul, Mimouna

doi:10.1007/s00339-020-03812-y

Cited by 3 publications

(3 citation statements)

References 19 publications

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“…Using the technique of ultraviolet photoelectron spectroscopy (UPS), the values of the output of some types of TPCO films were determined, the location of characteristic maxima in the valence energy zone [7.10] was established. One of the methods of optimizing the characteristics of organic electronics devices is the use of hybrid (two-component) materials, or the use of several layers of materials based on different molecules [3,11,12]. Films based on molecules of substituted perylene and naphthalenes, such as perylenetetracarbon dianhydride and naphthalene-tetracarbon dianhydride [13][14][15], have proven themselves as an electronacceptor componentas part of the composite.…”

Section: Introductionmentioning

confidence: 99%

Conduction band electronic states of ultrathin thiophene-phenylene co-oligomer and substituted biphenyl films on the surface of layer-by-layer grown ZnO

A.S.

E.F.

N.B.

et al. 2022

Physics of the Solid State

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The results of studying the electronic states of the conduction band and interface potential barrier during the formation of ultrathin films of thiophene-phenylene co-oligomer CH3-phenylene-thiophene-thiophene-phenylene -CH3(CH3-PTTP-CH3) on the surface of ZnO and films of biphenyl tetracarboxylic dianhydride (BPDA) on the ZnO surface are presented. A 100 nm thick ZnO layer was prepared by atomic layer deposition (ALD). Organic CH3-PTTP-CH3 films and BPDA films up to 8 nm thick were formed by thermal vacuum deposition. During film deposition, the electronic characteristics of the surface were studied using total current spectroscopy (TCS) in the energy range from 5 eV to 20 eV above EF. In this energy range, the structure of the maxima of the unoccupied electronic states of CH3-PTTP-CH3 and BPDA films was determined. As a result of the CH3-PTTP-CH3 film deposition, a decrease in the work function to 4.0 eV was found, compared with the value of the work function of 4.2 eV measured from the ALD ZnO-substrate. This corresponds to the transfer of a negative charge from the CH3-PTTP-CH3 film to the substrate. The charge transfer at the interface between the BPDA film and the ALD ZnO-substrate occurs in the opposite direction, since a 4.7 eV increase of the work function was registered during the formation of this interface. The CH3-PTTP-CH3 and BPDA films studied and the layer-by-layer grown ZnO film represent a continuous coating on sufficiently large surface areas of the order of 10 μmx10 μm. The roughness of the ZnO surface does not exceed 4 nm, and the surface roughness of CH3-PTTP-CH3 and BPDA films was 10-15 nm. Keywords: thiophene-phenylene co-oligomers, biphenyl tetracarboxylic dianhydride, ultrathin films, ZnO, atomic layer deposition method, electronic properties, low-energy electron spectroscopy, interface potential barrier.

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Section: Introductionmentioning

confidence: 99%

Conduction band electronic states of ultrathin thiophene-phenylene co-oligomer and substituted biphenyl films on the surface of layer-by-layer grown ZnO

A.S.

E.F.

N.B.

et al. 2022

Physics of the Solid State

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“…С помощью методики ультрафиолетовой фотоэлектронной спектроскопии (UPS) установлены значения работы выхода некоторых видов пленок TPCO, установлено расположение характерных максимумов в валентной энергетической зоне [7,10]. Одним из методов оптимизации характеристик устройств органической электроники является использование гибридных (двухкомпонентных) материалов, либо использование нескольких слоев материалов на основе различающихся молекул [3,11,12]. В качестве электрон-акцепторного компонента в составе композита хорошо зарекомендовали себя пленки на основе молекул замещенных периленов и нафталинов, такие как перилен-тетракарбоновый диангидрид и нафталинтетракарбоновый диангидрид [13][14][15].…”

Section: Introductionunclassified

Электронные состояния зоны проводимости ультратонких пленок тиофен-фенилен со-олигомера и замещенного бифенила на поверхности послойно выращенного ZnO

Комолов¹,

Лазнева²,

Герасимова³

et al. 2022

Физика Твердого Тела

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The results of studying the electronic states of the conduction band and interface potential barrier during the formation of ultrathin films of thiophene-phenylene co-oligomer CH3-phenylene-thiophene-thiophene-phenylene-CH3 (CH3-PTTP-CH3) on the surface of ZnO and films of biphenyl tetracarboxylic dianhydride (BPDA) on the ZnO surface are presented. A 100 nm thick ZnO layer was prepared by atomic layer deposition (ALD). Organic CH3-PTTP-CH3 films and BPDA films up to 8 nm thick were formed by thermal vacuum deposition. During film deposition, the electronic characteristics of the surface were studied using total current spectroscopy (TCS) in the energy range from 5 eV to 20 eV above EF. In this energy range, the structure of the maxima of the unoccupied electronic states of CH3-PTTP-CH3 and BPDA films was determined. As a result of the CH3-PTTP-CH3 film deposition, a decrease in the work function to 4.0 eV was found, compared with the value of the work function of 4.2 eV measured from the ALD ZnO substrate. This corresponds to the transfer of a negative charge from the СH3-PTTP-CH3 film to the substrate. The charge transfer at the interface between the BPDA film and the ALD ZnO substrate occurs in the opposite direction, since a 4.7 eV increase of the work function was registered during the formation of this interface. The СH3-PTTP-СH3 and BPDA films studied and the layer-by-layer grown ZnO film represent a continuous coating on sufficiently large surface areas of the order of 10 micrometers x 10 micrometers. The roughness of the ZnO surface does not exceed 4 nm, and the surface roughness of CH3-PTTP-CH3 and BPDA films was 10–15 nm.

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“…Ghosh et al (2010) studied the dielectric properties of P(NVC), a conducting polymer, by preparing its composites with acetylene black and ZnO separately and found that the nanocomposite of poly(N-vinylcarbazole) with acetylene black exhibited a negative dielectric constant at high frequency. Goumri et al (2020) synthesized composites of P(NVC) with graphene oxide and emphasized that the electrical conductivity can be improved depending on the varying graphene oxide ratio. Benzyl Methacrylate (BZMA) is a methacrylic monomer containing the phenyl group in its structure.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, Optical and Thermal Properties of P(NVC-co-BZMA) Copolymer and Its ZnO Composites

Barım

2022

Gazi University Journal of Science Part A: Engineering and Innovation

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Recent studies have paid particular attention to polymer-nanoparticle composite materials considering they have a number of interesting properties, which include optical, thermal, electrical, and others (Reyna-Gonzalez et al., 2009; Yakuphanoglu et al., 2010). In this study, a free radical polymerization process was used to create a copolymer of N-vinylcarbazole (NVC) and benzyl methacrylate (BZMA) at 25–75 mol% each. The procedure was conducted at 70°C with azobisisobutyronitrile (AIBN) acting as the initiator. Nano zinc oxide powders were then added to composites at three different ratios of 5%, 10%, and 15% weight of the copolymer. In order to better understand the structures of the P(NVC-co-BZMA) and its composites, FT-IR, 1H NMR, and UV spectroscopic techniques were also implemented. The optical characteristics of both the pure copolymer and its composites were examined. In the visible region, the composite containing 15% nano ZnO had the highest optical absorbance value. Additionally, the thermal behaviours of the composites and copolymers were analysed.

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Optical and electrical properties of poly (N-vinylcarbazole)/graphene oxide nanocomposites for organic semiconductor devices

Cited by 3 publications

References 19 publications

Conduction band electronic states of ultrathin thiophene-phenylene co-oligomer and substituted biphenyl films on the surface of layer-by-layer grown ZnO

Conduction band electronic states of ultrathin thiophene-phenylene co-oligomer and substituted biphenyl films on the surface of layer-by-layer grown ZnO

Электронные состояния зоны проводимости ультратонких пленок тиофен-фенилен со-олигомера и замещенного бифенила на поверхности послойно выращенного ZnO

Synthesis, Characterization, Optical and Thermal Properties of P(NVC-co-BZMA) Copolymer and Its ZnO Composites

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