ZnO/TiO2 thin films for photocatalytic application

Hussin, Rosniza; Seng, Go Hock; Zulkiflee, Nur Syahraain; Harun, Zawati; Hatta, Mohamed Nasrul Mohamed; Yunos, Muhamad Zaini

doi:10.1063/1.5089395

Cited by 7 publications

(2 citation statements)

References 16 publications

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“…This estimated value aligns with the typical band gap values observed for TiO 2 and ZnO, which are considered similar. This similarity makes these two materials well suited to be combined with each other, thus enhancing their overall properties [45].…”

Section: Optical Properties Of N-tio 2 /Zno Bilayer Thin Filmmentioning

confidence: 99%

The Impact of Spinning Speed on n-TiO2/ZnO Bilayer Thin Film Fabricated through Sol–Gel Spin-Coating Method

Arifin,

Mhd Noor,

Mohamad

et al. 2024

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The spinning speed parameter plays a crucial role in determining the properties of an n-TiO2/ZnO bilayer thin film fabricated using the sol–gel spin-coating technique, especially for solar cell applications. In this study, various spinning speeds were employed on an n-TiO2/ZnO bilayer thin film, and characterizations were conducted, such as morphological, structural, and optical properties. The findings revealed that the optimal conditions for the thin film were achieved at a spinning speed of 3000 rpm. Under this condition, a homogenous and compact surface morphology was observed, with an even distribution of ZnO grains. The successful fabrication of an n-TiO2/ZnO bilayer thin film was confirmed by the presence of characteristic peaks for both TiO2 and ZnO. Obviously, three dominant ZnO orientation peaks, which included (100), (002), and (101) were identified. The prevalence of the (002)-ZnO orientation plane indicated a high-quality structure with excellent crystallinity. In terms of optical properties, the achievement of high transmittance up to 75% resembles the high transparency of the thin film. The optical energy of the n-TiO2/ZnO bilayer thin film is estimated at 3.10 eV. In summary, the spinning speed parameter played a pivotal role in enhancing various properties of the thin film, making it a significant factor in its development for diverse applications.

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Section: Optical Properties Of N-tio 2 /Zno Bilayer Thin Filmmentioning

confidence: 99%

The Impact of Spinning Speed on n-TiO2/ZnO Bilayer Thin Film Fabricated through Sol–Gel Spin-Coating Method

Arifin,

Mhd Noor,

Mohamad

et al. 2024

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“…However, the limitation of TiO 2 is its comparatively high electron-hole recombination rate. To solve this, the combination of TiO 2 with other metal oxides may overcome the problem and enhance the properties [5]. Zinc Oxide (ZnO) thin film is supposed to be an ideal choice as an electron transfer bilayer because it was simply assembled together with another metallic oxide [6,7].…”

Section: Introductionmentioning

confidence: 99%

Annealing Treatment on Homogenous n-TiO2/ZnO Bilayer Thin Film Deposition as Window Layer for p-Cu2O-Based Heterostructure Thin Film

et al. 2023

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Metal oxide semiconductor material has great potential to act as window layer in p–n heterojunction solar cell thin film owing to low production cost and significant properties in photovoltaic mechanism. In this work, n-TiO2/ZnO bilayer thin film was effectively constructed by means of sol-gel spin coating technique in an effort to diminish the electron-hole recombination rate from single-layered thin film. Annealing time is one of the important parameters in the fabrication process and was varied to study the impact of annealing treatment towards the thin film characteristics as window layer. It was found that the optimum parameter for the n-TiO2/ZnO bilayer was 500 °C with an annealing time of 2 h. High crystallinity of the n-(101)-TiO2/(002)-ZnO bilayer thin film was obtained, which consists of anatase and a hexagonal wurtzite structure, respectively. Orientation of (002)-ZnO is essential for deposition with the (111) Cu2O-absorbing layer due to a low different lattice mismatch between these two interfaces. The homogenous morphology of n-TiO2/ZnO bilayer was observed with a compact and dense layer. The improvement of transmittance has also been achieved in a range of 60%–80%, which indicated that the incident light can penetrate throughout the thin film directly. In addition, a p-Cu2O absorbing layer was successfully fabricated on top of n-TiO2/ZnO bilayer thin film to form a p-n junction in order to visualize significant electrical rectification properties. The existence of p-Cu2O was confirmed by a (111)-peak orientation and triangular shape in structural and morphological properties, respectively.

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Influence of precursors and formation of heterostructures towards the enhanced photocatalytic activity of ZnO thin films deposited by spray pyrolysis

Deepthi

Sebastian

Vidhya

2022

J Mater Sci: Mater Electron

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ZnO/TiO2 thin films for photocatalytic application

Cited by 7 publications

References 16 publications

The Impact of Spinning Speed on n-TiO2/ZnO Bilayer Thin Film Fabricated through Sol–Gel Spin-Coating Method

The Impact of Spinning Speed on n-TiO2/ZnO Bilayer Thin Film Fabricated through Sol–Gel Spin-Coating Method

Annealing Treatment on Homogenous n-TiO2/ZnO Bilayer Thin Film Deposition as Window Layer for p-Cu2O-Based Heterostructure Thin Film

Influence of precursors and formation of heterostructures towards the enhanced photocatalytic activity of ZnO thin films deposited by spray pyrolysis

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