Structural and electrical properties of nitrogen-doped ZnO thin films

Tüzemen, Ebru Şenadım; Kara, Kamuran; Elagöz, S.; Takçı, Deniz Kadir; Altuntaş, İsmail; Esen, Ramazan

doi:10.1016/j.apsusc.2014.02.118

Cited by 23 publications

(14 citation statements)

References 41 publications

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“…The DRS results were used to calculate the band gap values of the semiconductor for each sample, using the Kubelka-Munk model [33]. The calculated band gap values for the samples show small deviations from the values of the literature [34][35][36] (Table 2), which indicates an approximate gap of 3.2 eV. Band gap values samples differ from band gap values obtained for samples synthesized by solvothermal method (E bg = 3.31 eV) and for ZnO quantum dots (E bg = 3.41-3.47 eV) [36].…”

Section: Optical Behaviormentioning

confidence: 99%

High-performance ultraviolet-visible driven ZnO morphologies photocatalyst obtained by microwave-assisted hydrothermal method

Byzynski

Pereira

Volanti

et al. 2018

Journal of Photochemistry and Photobiology A: Chemistry

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The use of extensive, time-consuming synthesis and the cost of an additional element in synthesis makes difficult the synthesis of photocatalyst active under a broad wavelength range. We propose a synthesis method to obtain ZnO nanoparticles in distinctive morphologies, which lie to several photocatalytic activation conditions. The Zn precursor concentration, solvent, temperature and reaction time altered the ZnO particles morphologies. Although all synthesis parameters modification interferes in ZnO particle morphology, the most pronounced was Zn salt precursor concentration. The synthesis parameter did not interfere in the crystalline wurtzite ZnO phase and the optical characterization, indicating possibilities of ionic defects formations in ZnO lattice. The "3-D flower like" ZnO structure reaches 98% of discoloration under UV illumination and 42% under visible illumination of initial rhodamine-B concentration. The good UV and visible photocatalytic active confirms that with only the modification of synthesis method without any dopant element, ZnO structure is active in large wavelength range.

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Section: Optical Behaviormentioning

confidence: 99%

High-performance ultraviolet-visible driven ZnO morphologies photocatalyst obtained by microwave-assisted hydrothermal method

Byzynski

Pereira

Volanti

et al. 2018

Journal of Photochemistry and Photobiology A: Chemistry

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“…In contrast, metal doping is more likely to induce the formation of vacancies or defect states that can serve as the recombination center for photogenerated electrons and holes. Compared with other nonmetal dopants, nitrogen [41][42][43][44][45][46], carbon [47][48][49][50][51] and sulfur [52][53][54] have been more extensively studied in recent years. Doping ZnO with these nonmetal elements has shown to be promising approaches to narrow the band gap and thus induce stronger visible-light absorption.…”

Section: Introductionmentioning

confidence: 99%

New insight into the enhanced photocatalytic activity of N-, C- and S-doped ZnO photocatalysts

Zhang

Peng

2016

Applied Catalysis B: Environmental

524

160

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“…N could be used to obtain a stable p-type N-doped ZnO (ZnO:N) semiconductor structure [29][30][31], resulting in the improvement of photocatalytic activity [32][33][34][35][36][37][38][39][40][41]. Theoretical calculations point out that N is the best superficial acceptor candidate for ZnO [42] while Amiri et al [43] have analyzed the possible source of ferromagnetism in ZnO:N compounds by using ab-initio calculations.…”

Section: Introductionmentioning

confidence: 99%

The interplay between morphology and photocatalytic activity in ZnO and N-doped ZnO crystals

et al. 2017

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Photocatalytic materials can perform oxidative and reductive reactions over their surfaces when excited with light. Intrinsic characteristics of the material such as superficial area, morphological structure, and crystalline phase exposition play a fundamental role in the corresponding reaction paths. However, especially in doped semiconductors, as ZnO:N, less is known about how the synthesis parameters affect the morphologies and the photocatalytic activity simultaneously. To solve this issue, ZnO and ZnO:N samples were obtained using microwave-assisted hydrothermal and modified polymeric precursor methods of synthesis. Samples morphologies were characterized by TEM and FE-SEM. Crystallographic phases were observed by XRD and optical characteristics by DRS. XPS results confirmed the doping process. Degradation of Rhodamine-B and Cr(VI) reduction were employed as probe reactions to investigate their photocatalytic activity. Although the crystallographic structure of these powders maintains the ZnO hexagonal wurtzite structure, the optical properties and morphologies, and photocatalytic activities present different behaviors. Also, density functional theory calculations were employed to determine the specific features related to electronic structure, morphology, and photocatalytic activity.Different synthesis methods produce a singular behavior in the physicochemical properties of materials, and the doping effect produces various modifications in RhB degradation and Cr(VI) reduction for each synthesis method. Crystal face exposition and morphologies are related to the improvement in the photocatalytic activity of the materials.

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Structural and electrical properties of nitrogen-doped ZnO thin films

Cited by 23 publications

References 41 publications

High-performance ultraviolet-visible driven ZnO morphologies photocatalyst obtained by microwave-assisted hydrothermal method

High-performance ultraviolet-visible driven ZnO morphologies photocatalyst obtained by microwave-assisted hydrothermal method

New insight into the enhanced photocatalytic activity of N-, C- and S-doped ZnO photocatalysts

The interplay between morphology and photocatalytic activity in ZnO and N-doped ZnO crystals

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