Influence of a sputtered compact TiO2 layer on the properties of TiO2 nanotube photoanodes for solid-state DSSCs

Krumpmann, Arnaud; Dervaux, Jonathan; Derue, Lionel; Douhéret, Olivier; Lazzaroni, Roberto; Snyders, Rony; Decroly, André

doi:10.1016/j.matdes.2017.02.028

Cited by 27 publications

(21 citation statements)

References 36 publications

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“…It should be stressed that titanium dioxide is one of the richest compounds on our planet, and a very appealing material for a variety of applications [26,27,28,29,30,31]. In fact, TiO 2 has been applied in: ultraviolet photodetectors, organic lights emitting diodes, organic solar cells, and photocatalytic water-splitting technology.…”

Section: Introductionmentioning

confidence: 99%

Influence of TiO2 Nanoparticles on Liquid Crystalline, Structural and Electrochemical Properties of (8Z)-N-(4-((Z)-(4-pentylphenylimino)methyl)benzylidene)-4-pentylbenzenamine

et al. 2019

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Organic–inorganic hybrids based on liquid crystalline symmetrical imine (8Z)-N-(4-((Z)-(4-pentylphenylimino)methyl)benzylidene)-4-pentylbenzenamine (AZJ1) with two aliphatic chains and TiO2 nanomaterials were obtained and investigated taking into account thr crystallographic form of titanium dioxide i.e. anatase versus rutile. The type of TiO2 influences the mesomorphic properties of imine AZJ1, as observed by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM) techniques. Fourier-Transform Infrared Spectroscopy (FT-IR) was used to investigate the interactions of oxygen vacancies located on the TiO2 surface with the studied AZJ1 imine together with studying the influence of temperature. Both imine:TiO2 anatase versus rutile hybrids possessed the highest occupied molecular orbital (HOMO) levels of about −5.39 eV (AZJ1:anatase) and −5.33 eV (AZJ1:rutile) and the lowest unoccupied molecular orbital (LUMO) levels of about −2.24 eV. The presence of TiO2 in each hybrid did not strongly affect the redox properties of imine AZJ1. Organic devices with the configuration of ITO/TiO2/AZJ1 (or AZJ1:TiO2 anatase versus rutile)/Au were fabricated and investigated in the presence and absence of visible light irradiation with a light intensity of 93 mW/cm2. Finally, to analyze defects in the constructed organic devices we used thermal imaging and atomic force microscopy (AFM). The addition of TiO2 in both crystallographic forms has a positive influence on layer-forming properties that manifests itself as a very homogenous heat distribution for the whole sample.

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Section: Introductionmentioning

confidence: 99%

Influence of TiO2 Nanoparticles on Liquid Crystalline, Structural and Electrochemical Properties of (8Z)-N-(4-((Z)-(4-pentylphenylimino)methyl)benzylidene)-4-pentylbenzenamine

et al. 2019

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“…So far, most transparent TiO 2 nanotubular arrays have consisted of nanotubes prepared on bulk material and then transferred and attached on a transparent substrate [ 16 , 17 ]. However, the fully transparent nanotubular TiO 2 arrays prepared directly by the complete anodization of a metallic Ti thin layer deposited on a fluorine-doped tin oxide (FTO) glass substrate would represent the most straightforward solution [ 6 , 7 , 8 , 9 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ]. Nanotubes prepared on FTO glass are mainly tested as photoanodes in DSSCs [ 7 , 21 , 23 , 24 ] and not in PEC (photoelectrochemical) water splitting [ 9 , 22 ], so there is not much work dealing with photoelectrochemical measurements in an aqueous phase for TNTs prepared directly on FTO glass.…”

Section: Introductionmentioning

confidence: 99%

Transparent Nanotubular TiO2 Photoanodes Grown Directly on FTO Substrates

et al. 2017

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This work describes the preparation of transparent TiO2 nanotube (TNT) arrays on fluorine-doped tin oxide (FTO) substrates. An optimized electrolyte composition (0.2 mol dm−3 NH4F and 4 mol dm−3 H2O in ethylene glycol) was used for the anodization of Ti films with different thicknesses (from 100 to 1300 nm) sputtered on the FTO glass substrates. For Ti thicknesses 600 nm and higher, anodization resulted in the formation of TNT arrays with an outer nanotube diameter around 180 nm and a wall thickness around 45 nm, while for anodized Ti thicknesses of 100 nm, the produced nanotubes were not well defined. The transmittance in the visible region (λ = 500 nm) varied from 90% for the thinnest TNT array to 65% for the thickest TNT array. For the fabrication of transparent TNT arrays by anodization, the optimal Ti thickness on FTO was around 1000 nm. Such fabricated TNT arrays with a length of 2500 nm exhibit stable photocurrent densities in aqueous electrolytes (~300 µA cm−2 at potential 0.5 V vs. Ag/AgCl). The stability of the photocurrent response and a sufficient transparency (≥65%) enables the use of transparent TNT arrays in photoelectrochemical applications when the illumination from the support/semiconductor interface is a necessary condition and the transmitted light can be used for another purpose (photocathode or photochemical reaction in the electrolyte).

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“…Thed isadvantages of using liquid electrolytes are less long-term stability,difficultyinr obusts ealing, and leakage of electrolyteincase of breaking of the glass substrates.Replacing liquid electrolytew ith solid-state electrolytea nd quasisolid-state is one of suitable approach to overcomet he problem related to the evaporation and leakage of liquid electrolyte.I ti sgenerally known that solid-state electrolyteb ecause of its low electroninjection kinetics and poor conversion efficiency are the insurmountable barriers for applications. [31,32] Therefore,n ovel quasi-solid-stateD SSCs (QSDSCs) were greatly studied in DSSCs. [33][34][35] Among all the polymer quasisolid-state electrolyte materials,p oly(ethylene oxide) (PEO) has been intensively investigated as solid polymer electrolyte due to its mechanical and chemical stability and polar moiety that can act as excellent solventf or dissolving metal salts.…”

Section: Resultsmentioning

confidence: 99%

“…Replacing liquid electrolyte with solid‐state electrolyte and quasi‐solid‐state is one of suitable approach to overcome the problem related to the evaporation and leakage of liquid electrolyte. It is generally known that solid‐state electrolyte because of its low electron injection kinetics and poor conversion efficiency are the insurmountable barriers for applications . Therefore, novel quasi‐solid‐state DSSCs (QSDSCs) were greatly studied in DSSCs .…”

Section: Resultsmentioning

confidence: 99%

High‐Efficiency Dye‐Sensitized Solar Cells Based on a ZnO Nanorod/ Nanosheet Hierarchical Structure

et al. 2018

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An aqueous solution of Zn(NO3)2⋅6 H2O‐C6H2N4‐PEI and Zn(NO3)2⋅6 H2O‐CO(NH2)2 is used as the raw materials to fabricate hierarchically structured films of ZnO nanorods/nanosheets (ZnO NRs/NSs) via a two‐step hydrothermal synthesis. The films of ZnO NRs/NSs are then applied as photoanodes for application in dye‐sensitized solar cells (DSSCs). The current density–voltage curves and the incident monochromatic photon‐to‐electron conversion efficiency of DSSCs are measured. Using electrochemical impedance spectroscopy, intensity modulated photovoltage spectroscopy, and intensity modulated photocurrent spectroscopy, the conditions of the internal electron transport and transfer of ZnO‐based DSSCs are tested and analyzed. The results indicate that the ZnO NRs/NSs photoanodes have properties of rapid electron transport and high electron collection efficiency and show a relatively large amount of dye absorption. Therefore, for DSSCs based on ZnO NRs/NSs with liquid electrolyte, the short‐circuit current density (Jsc), open‐circuit voltage (Voc), fill factor (FF), and photoelectric conversion efficiency (PCE) are 11.82 mA cm−2, 0.66 V, 0.58, and 4.59 %, respectively. The PCE of the DSSCs is improved by 178.18 % compared to that of pure ZnO NRs cells (1.65 %) and is improved by 21.42 % with respect to pure ZnO NSs cells (3.78 %).

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Influence of a sputtered compact TiO2 layer on the properties of TiO2 nanotube photoanodes for solid-state DSSCs

Cited by 27 publications

References 36 publications

Influence of TiO2 Nanoparticles on Liquid Crystalline, Structural and Electrochemical Properties of (8Z)-N-(4-((Z)-(4-pentylphenylimino)methyl)benzylidene)-4-pentylbenzenamine

Influence of TiO2 Nanoparticles on Liquid Crystalline, Structural and Electrochemical Properties of (8Z)-N-(4-((Z)-(4-pentylphenylimino)methyl)benzylidene)-4-pentylbenzenamine

Transparent Nanotubular TiO2 Photoanodes Grown Directly on FTO Substrates

High‐Efficiency Dye‐Sensitized Solar Cells Based on a ZnO Nanorod/ Nanosheet Hierarchical Structure

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