TiO<sub>2</sub> thin films by ultrasonic spray pyrolysis

Chen, Zengjun; Dündar, Ibrahim; Açik, Ilona Oja; Mere, Arvo

doi:10.1088/1757-899x/503/1/012006

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…Such ETL implementation into the heterostructures offers a path towards photovoltaic technologies that use relatively simple and near-room fabrication techniques. TiO 2 thin films can be deposited by different techniques such as chemical vapor deposition (CVD), atomic layer deposition (ALD), dip coating, spin coating, spray pyrolysis, e-beam evaporation, and magnetron sputtering [23][24][25][26]. Among them, the method that reports the best results in the aforementioned application is ALD [24,27].…”

Section: Introductionmentioning

confidence: 99%

Sputtered Ultrathin TiO2 as Electron Transport Layer in Silicon Heterojunction Solar Cell Technology

2022

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This work presents the implementation of ultrathin TiO2 films, deposited at room temperature by radio-frequency magnetron sputtering, as electron-selective contacts in silicon heterojunction solar cells. The effect of the working pressure on the properties of the TiO2 layers and its subsequent impact on the main parameters of the device are studied. The material characterization revealed an amorphous structure regardless of the working pressure; a rougher surface; and a blue shift in bandgap in the TiO2 layer deposited at the highest-pressure value of 0.89 Pa. When incorporated as part of the passivated full-area electron contact in silicon heterojunction solar cell, the chemical passivation provided by the intrinsic a-Si:H rapidly deteriorates upon the sputtering of the ultra-thin TiO2 films, although a short anneal is shown to restore much of the passivation lost. The deposition pressure and film thicknesses proved to be critical for the efficiency of the devices. The film thicknesses below 2 nm are necessary to reach open-circuit values above 660 mV, regardless of the deposition pressure. More so, the fill-factor showed a strong dependence on deposition pressure, with the best values obtained for the highest deposition pressure, which we correlated to the porosity of the films. Overall, these results show the potential to fabricate silicon solar cells with a simple implementation of electron-selective TiO2 contact deposited by magnetron sputtering. These results show the potential to fabricate silicon solar cells with a simple implementation of electron-selective TiO2 contact.

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Section: Introductionmentioning

confidence: 99%

Sputtered Ultrathin TiO2 as Electron Transport Layer in Silicon Heterojunction Solar Cell Technology

2022

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“…TiO 2 is well-known to exhibit photocatalytic properties for application in antibacterial [ 1 ] and self-cleaning surfaces [ 2 ], degradation of organic pollution [ 3 ], or water splitting [ 4 ]. The TiO 2 coatings have been produced by different methods such as chemical vapour deposition (CVD) [ 5 ], dip-coating [ 6 ] and ultrasonic spray pyrolysis [ 7 ]. All of these approaches in most cases require annealing; thus, the substrates are limited to brittle inorganics.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Activity of TiO2 Coatings Obtained at Room Temperature on a Polymethyl Methacrylate Substrate

Iesalnieks

Eglı̅tis²,

Juhna³

et al. 2022

IJMS

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Titanium dioxide (TiO2) coatings have a wide range of applications. Anatase exhibits hydrophilic, antimicrobial, and photocatalytic properties for the degradation of organic pollutants or water splitting. The main challenge is to obtain durable anatase nanoparticle coatings on plastic substrates by using straightforward approaches. In the present study, we revealed the preparation of a transparent TiO2 coating on polymethylmethacrylate (PMMA), widely used for organic optical fibres as well as other polymer substrates such as polypropylene (PP), polystyrene (PS), and polycarbonate (PC). The films were spin-coated at room temperature without annealing; therefore, our approach can be used for thermo-sensitive substrates. The deposition was successful due to the use of stripped ultra-small (<4 nm) TiO2 particles. Coatings were studied for the photocatalytic degradation of organic pollutants such as MB, methyl orange (MO), and rhodamine B (RB) under UV light. The TiO2 coating on PMMA degraded over 80% of RB in 300 min under a 365 nm, 100 W mercury lamp, showing a degradation rate constant of 6∙10−3 min−1. The coatings were stable and showed no significant decrease in degradation activity even after five cycles.

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Comparative Study of Titanium Dioxide Thin Films Deposited by Spray Pyrolysis and Dr. Blade Method for Solar Cells Applications

Hartiti

Masat

Ertuğrul

et al. 2022

Sustainable Energy-Water-Environment Nexus in Deserts

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TiO₂ thin films by ultrasonic spray pyrolysis

Cited by 8 publications

References 19 publications

Sputtered Ultrathin TiO2 as Electron Transport Layer in Silicon Heterojunction Solar Cell Technology

Sputtered Ultrathin TiO2 as Electron Transport Layer in Silicon Heterojunction Solar Cell Technology

Photocatalytic Activity of TiO2 Coatings Obtained at Room Temperature on a Polymethyl Methacrylate Substrate

Comparative Study of Titanium Dioxide Thin Films Deposited by Spray Pyrolysis and Dr. Blade Method for Solar Cells Applications

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TiO2 thin films by ultrasonic spray pyrolysis

Cited by 8 publications

References 19 publications

Sputtered Ultrathin TiO2 as Electron Transport Layer in Silicon Heterojunction Solar Cell Technology

Sputtered Ultrathin TiO2 as Electron Transport Layer in Silicon Heterojunction Solar Cell Technology

Photocatalytic Activity of TiO2 Coatings Obtained at Room Temperature on a Polymethyl Methacrylate Substrate

Comparative Study of Titanium Dioxide Thin Films Deposited by Spray Pyrolysis and Dr. Blade Method for Solar Cells Applications

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TiO₂ thin films by ultrasonic spray pyrolysis