Study of TiO2 nanomembranes obtained by an induction heated MOCVD reactor

Crisbasan, A.; Chaumont, Denis; Sacilotti, M.; Crişan, Aurel; Lazar, Ana Maria; Ciobanu, Ioan; Lacroute, Y.; Chassagnon, R.

doi:10.1016/j.apsusc.2015.09.113

Cited by 7 publications

(5 citation statements)

References 13 publications

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“…Rodrigo T. et al [17] have already proven these results. The studies carried out by A. Crisbasan have shown that the TiO2 layer obtained by MOCVD consists of monocrystalline columns perpendicular to the substrate [14]. Before doing our grain size calculations, we will correct the FWHM measurements by instrumental enlargement before applying the formula.…”

Section: Resultsmentioning

confidence: 99%

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Improvement of Electrical Properties of Grätzel Cells by Tuning the Dye Layer with CdS/ZnO Junction

Melouki¹,

Mehnane²,

Djelloul³

et al. 2021

J. Nano- Electron. Phys.

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Solar cells based on organic dye have been widely used for the reason of their simplicity of manufacture. A simple structure is composed of a colored layer of TiO2, an electrolyte and a counter electrode. In this study, the layers of TiO2, CdS and ZnO were deposited on conductive glass by different methods to replace organic dye. Metal organic chemical vapor deposition (MOCVD) method was used to prepare the TiO2 layer, chemical bath deposition (CBD) to prepare the CdS layer, and spray pyrolysis (SP) for the preparation of the ZnO layer. Morphological and structural studies have shown a homogeneous morphology of the superposition of TiO2/CdS/ZnO layers. XRD and SEM characterizations have shown that annealing of the CdS layer must be done under a controlled atmosphere in order to avoid the formation of cadmium oxide and to control the particle size. The aim of this work is the substitution of organic dye in the Grätzel cell by CdS(n)/ZnO(n + ) junction. Morphological and optical properties of TiO2/CdS/ZnO in addition to photovoltaic performance of this structure junction were investigated with different deposition times of the CdS layer. It is found that the nature of the substrate has no influence on the realization of the junction. It is noticed that each layer added leads to a decrease in the transmittance of the substrate. Characterization of the photovoltaic properties of cells based on the CdS/ZnO junction shows a higher yield compared to conventional cells based on organic dye. It is also recommended to undertake annealing under a controlled atmosphere such as nitrogen in order to eliminate the CdO secondary phase and decrease the size of the grains which may enhance the efficiency of the solar cells.

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Section: Resultsmentioning

confidence: 99%

“…Titanium isopropoxide (TIP) was used as a precursor of TiO2 concentrated to 99.999 %. The growth was carried out under nitrogen at a temperature of 550 °C and deposition time of 30 min [14]. In the second step, the optimization of CdS layers was done by CBD under several temperatures (30, 50, 80 °C).…”

Section: Preparation Of Thin Filmsmentioning

confidence: 99%

Improvement of Electrical Properties of Grätzel Cells by Tuning the Dye Layer with CdS/ZnO Junction

Melouki¹,

Mehnane²,

Djelloul³

et al. 2021

J. Nano- Electron. Phys.

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“…Among these preparation methods, the Chemical Vapour Deposition method with organometallic precursors (MOCVD method), is a promising one to obtain nanostructured surfaces. From the variety of TiO 2 nanostructures deposited by MOCVD, original and reproducible 2D (wires) and 3D (membranes, crucibles, trees…) nanostructures can be obtained [5] by varying growth parameters and catalysts.…”

Section: Reagentsmentioning

confidence: 99%

Study of seahorse-like Fe-TiO2 core-shell nanorods obtained in an induction heated MOCVD reactor

Crisbasan¹

2016

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Study of seahorse-like Fe-TiO 2 core-shell nanorods obtained in an induction heated MOCVD reactorThis paper presents the growth of Fe-TiO 2 COaxial Heterostructure Nanorods (COHN) by Metal-Organic Chemical Vapour Deposition (MOCVD). The Fe-TiO 2 COHN were grown in one step on silicon based substrates, using titanium isopropoxide as precursor and ferrocene as catalyst. Various growth parameters (deposition time, temperature and substrates) were modified to define a growth model. Samples' morphology and structure were characterized by SEM and Fe-TiO 2 COHN were extensively analyzed by TEM, EDS, SAED and EELS. These techniques show the coaxial structure of Fe-TiO 2 COHN and confirm that the core is pure iron, while the shell is titanium dioxide.

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“…Among them, the one-dimensional TiO2 nanorods array structure has unique advantages compared to other structures or two-dimensional film structures, the regularly arranged TiO2 nanorod array has obvious quantum confinement effect, high specific surface area and stable structure, which can improve the interfacial separation ability of photogenerated electronphotogenerated hole pairs and carrier transport efficiency, thereby improving photocatalytic performance [8][9][10][11] . At present, the main preparation methods of TiO2 nanorod arrays are template synthesis [12] , metal organic chemical vapor deposition (MOCVD) [13,14] , sol-gel method [15] , anodizing method [16,17] , hydrothermal method [18] . The hydrothermal process is simple, and the high-pressure reaction is carried out in a Teflon-lined stainless steel reactor.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Performance of PVP-Doped TiO<sub>2</sub> Nanorod Arrays Prepared by Hydrothermal Method

Zhou

et al. 2020

MSF

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Here we synthesized a high-density single crystal anatase phase TiO2/ITO nanorods array composite by one-step hydrothermal method. TiCl4, H2O, and HCl were used as the titanium precu-rsor, oxygen source, and inhibitors, respectively. The TiO2 nanorods array were analyzed using X-ray diffraction (XRD), energy dispersive X-ray spectrometer (EDX), scanning electron microscopy (SEM), optical contact angle tester and ultraviolet-fluorescence spectrophotometer, separately. The nanorods in the composite grew along the [101] crystal plane, with a diameter of about 500 nm and a length of about 3 μm. The effect of PVP addition on the crystal phase and morphology of TiO2 na-norod arrays was investigated. When the amount of PVP added was 0.5g, the diameter of nanorods was about 77-120nm, and a neat array structure appeared. In the photocatalytic experiment, methyl orange and acid red were used as degraded materials, the photocatalytic degradation rate was up to about 100%. When the hydrophilicity was the best, the optical contact angle of the sample after ultr-aviolet light irradiation was 7.2°. These results indicated that TiO2 after doping experiments got better photocatalytic properties.

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Study of TiO2 nanomembranes obtained by an induction heated MOCVD reactor

Cited by 7 publications

References 13 publications

Improvement of Electrical Properties of Grätzel Cells by Tuning the Dye Layer with CdS/ZnO Junction

Improvement of Electrical Properties of Grätzel Cells by Tuning the Dye Layer with CdS/ZnO Junction

Study of seahorse-like Fe-TiO2 core-shell nanorods obtained in an induction heated MOCVD reactor

Photocatalytic Performance of PVP-Doped TiO<sub>2</sub> Nanorod Arrays Prepared by Hydrothermal Method

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