The pivotal role of TiO2 layer thickness in optimizing the performance of TiO2/P-Si solar cell

Elsaeedy, H.I.; Qasem, Ammar; Yakout, H.A.; Mahmoud, Mona

doi:10.1016/j.jallcom.2021.159150

Cited by 50 publications

(25 citation statements)

References 74 publications

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“…From the UV-Vis optical measurements (see Figure 6) it was observed that the optical band-gap energy of the Ti-TiO 2 -CuMnO 2 heterostructures (see Figure 6b,d) decreases proportionally with the thickness of the layer. The increase in the thickness of the TiO 2 layers determines the addition of new energy levels, thereby creating new "cross-bridges" from the electrons that are transmitted between the valence band and conduction band, which increases the electron lifetime and decreases the recombination rate of the electrons [55]. In addition, the roughness can improve the response and recovery speeds because of the increasing of the contact surface between TiO 2 and CuMnO 2 , leading to the generation of more pairs of electron-holes.…”

Section: Optical Electrochemical and Electrical Propertiesmentioning

confidence: 99%

Fabrication of a UV Photodetector Based on n-TiO2/p-CuMnO2 Heterostructures

et al. 2021

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The heterojunction based on n-TiO2 nanolayer/p-CuMnO2 thin film was achieved using an efficient two-step synthesis process for the fabrication of a UV photodetector. The first step consisted of obtaining the TiO2 nanolayer, which was grown on titan foil by thermal oxidation (Ti-TiO2). The second step consisted of CuMnO2 thin film deposition onto the surface of Ti-TiO2 using the Doctor Blade method. Techniques such as X-ray diffraction, UV-VIS analysis, SEM, and AFM morphologies were used for the investigation of the structural and morphological characteristics of the as-synthesized heterostructures. The Mott–Schottky analysis was performed in order to prove the n-TiO2/p-CuMnO2 junction. The I-V measurements of the n-TiO2 nanolayer/p-CuMnO2 thin film heterostructure confirm its diode characteristics under dark state, UV and visible illumination conditions. The obtained heterojunction, which is based on two types of semiconductors with different energy band structures, improves the separating results of charges, which is very important for high-performance UV photodetectors.

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Section: Optical Electrochemical and Electrical Propertiesmentioning

confidence: 99%

Fabrication of a UV Photodetector Based on n-TiO2/p-CuMnO2 Heterostructures

et al. 2021

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“…As revealed in Fig. 2, the obvious diffraction peaks at 26.68°, 34.06°, 36.28°, 37.94°, 51.68°, 54.49°, 65.75°and 69.96°are ascribed to the (120), ( 130), ( 111), ( 040), ( 221), ( 231), (311) and (112) planes of TiO 2 (PDF#49-1433) [21,22]. With the introduction of MgO QDs, the new peaks at 56.39°and 62.94°are ascribed to the (211) and (220) planes of MgO (PDF#47-1049) [59].…”

Section: Resultsmentioning

confidence: 92%

“…Among these, the TiO 2 -based transparent device is regarded as a decent candidate [21][22][23], because it can balance the transparency and conductivity commendably via the proper intrinsic band gap of 3.0-3.2 eV and has always been the research hotspot over the decades, such as Sun groups have fabricated the ZnO/TiO 2 nanotree arrays for remarkable photoelectrochemistry performance [24] and Ahn groups have used the N-doped graphene QDs/TiO 2 films for fabricating solar cells [25]. However, the efficient solar utilization while maintaining high transparency would be a significant issue for its actual applications [26,27] and lots of attempts have been tried, such as element doping and surface modification.…”

Section: Introductionmentioning

confidence: 99%

A transparent photovoltaic device of NiO/MgO quantum dots/TiO2 arrays pn junction with carrier injection of MgO QDs

Pan

Niu

et al. 2021

J Mater Sci: Mater Electron

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A transparent photovoltaic device of NiO/MgO QDs/TiO 2 array pn junction was fabricated via a continuous hydrothermal-hydrolysis-sputtering method. Therefore, the TiO 2 arrays were prepared via a hydrothermal method, and the MgO QDs prepared by hydrolysis method were introduced on the surface of TiO 2 arrays. Subsequently, the NiO film was deposited on the surface of MgO QDs/TiO 2 arrays by sputtering. As revealed, the as-prepared transparent photovoltaic device exhibits a high transmittance of about * 80% in visible light, an obvious photovoltaic enhancement of about * 3 9 10 2 folds (PCE of 1.18%) than unmodified device, and decent stability during 3000 s' cycle, which can be mainly ascribed to that the MgO QDs with high quantum yield and appropriate potential can increase the charge carrier injection and assuage the potential gradient to improve the charge carriers efficiency, while maintaining the transparency. Additionally, the small size of MgO QDs can improve pn junction interface and the orderly arrays can increase solar efficiency.

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“…Titanium oxide is a widely used functional material with many applications (from bulk materials as a pigment, ceramics technology and the catalysis of nanocrystalline powder to thin layered technology). In recent years, nanocrystalline titanium oxide was developed for solar energy [ 1 , 2 , 3 ], used in biomedical and photocatalytic applications [ 4 , 5 , 6 , 7 , 8 , 9 ], and used as an optical [ 10 ], self-cleaning, hydrophobic [ 1 , 11 , 12 , 13 ] and decorative coating [ 14 , 15 , 16 , 17 ]. Miszczak and Pietrzyk [ 11 ] found that the transformation from anatase to the rutile phase within thin film coatings occurs in a higher temperature regime than in the case of bulk TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

The Influence of Annealing on the Optical Properties and Microstructure Recrystallization of the TiO2 Layers Produced by Means of the E-BEAM Technique

et al. 2021

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Titanium dioxide films, about 200 nm in thickness, were deposited using the e-BEAM technique at room temperature and at 227 °C (500K) and then annealed in UHV conditions (as well as in the presence of oxygen (at 850 °C). The fabricated dielectric films were examined using X-ray powder diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, atomic force microscopy, scanning electron microscopy, transmission electron microscopy, and spectroscopic ellipsometry. The applied experimental techniques allowed us to characterize the phase composition and the phase transformation of the fabricated TiO2 coatings. The films produced at room temperature are amorphous but after annealing consist of anatase crystallites. The layers fabricated at 227 °C contain both anatase and rutile phases. In this case the anatase crystallites are accumulated near the substrate interface whilst the rutile crystallites were formed closer to the surface of the TiO2 film. It should be emphasized that these two phases of TiO2 are distinctly separated from each other.

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The pivotal role of TiO2 layer thickness in optimizing the performance of TiO2/P-Si solar cell

Cited by 50 publications

References 74 publications

Fabrication of a UV Photodetector Based on n-TiO2/p-CuMnO2 Heterostructures

Fabrication of a UV Photodetector Based on n-TiO2/p-CuMnO2 Heterostructures

A transparent photovoltaic device of NiO/MgO quantum dots/TiO2 arrays pn junction with carrier injection of MgO QDs

The Influence of Annealing on the Optical Properties and Microstructure Recrystallization of the TiO2 Layers Produced by Means of the E-BEAM Technique

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