Structural and optical characterization of Cu doped ZnO thin films deposited by RF magnetron sputtering

Toma, M.; Ursulean, Nicolae; Marconi, Daniel; Pop, Alexandra

doi:10.2478/jee-2019-0054

Cited by 9 publications

(4 citation statements)

References 20 publications

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“…Furthermore, both the normalized absorption and steady-state photoluminescence (PL) spectra of MAPbI 3 QDs in hexane with different sizes exhibited continuous tunability, as can be seen in Figure 3 b. To determine the optical band gap energy of various sizes of MAPbI 3 QDs, the dependency of ( αhv ) 2 upon the incident photons energy hv was plotted, as depicted in Figure 3 c, and the band gap ( E g ) was estimated by extrapolating the linear part of ( αhv ) 2 versus ( hv ) [ 35 ]. As shown in Table 1 , the E g of small, medium, and large MAPbI 3 QDs was 1.75 eV, 1.71 eV, and 1.67 eV, correspondingly.…”

Section: Resultsmentioning

confidence: 99%

Efficient Charge Transfer in MAPbI3 QDs/TiO2 Heterojunctions for High-Performance Solar Cells

Ding

Liu

et al. 2023

Nanomaterials

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Methylammonium lead iodide (MAPbI3) perovskite quantum dots (QDs) have become one of the most promising materials for optoelectronics. Understanding the dynamics of the charge transfer from MAPbI3 QDs to the charge transport layer (CTL) is critical for improving the performance of MAPbI3 QD photoelectronic devices. However, there is currently less consensus on this. In this study, we used an ultrafast transient absorption (TA) technique to investigate the dynamics of charge transfer from MAPbI3 QDs to CTL titanium dioxide (TiO2), elucidating the dependence of these kinetics on QD size with an injection rate from 1.6 × 1010 to 4.3 × 1010 s−1. A QD solar cell based on MAPbI3/TiO2 junctions with a high-power conversion efficiency (PCE) of 11.03% was fabricated, indicating its great potential for application in high-performance solar cells.

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Section: Resultsmentioning

confidence: 99%

Efficient Charge Transfer in MAPbI3 QDs/TiO2 Heterojunctions for High-Performance Solar Cells

Ding

Liu

et al. 2023

Nanomaterials

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“…Following this, the absorption spectra of the samples were measured using a UV-Vis spectrometer (DR6000 model, Germany). The band gap energy of the ZnO nanoparticles was determined from the UV-visible spectra using the Tauc plot methodology [6].…”

Section: Methodsmentioning

confidence: 99%

Effect of Orange Fruit Peel Extract Concentration on the Synthesis of Zinc Oxide Nanoparticles

Tizazu,

Wondimu

2024

Preprint

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In this investigation, the impact of reducing agent concentration on the synthesis of zinc oxide nanoparticles was examined. During the synthesis, an assessment of ionic conductivity was carried out, revealing a significant increase in conductivity prior to the introduction of the reducing agent, followed by a sharp decrease upon its addition. Characterization of the ZnO NPs involved UV-visible spectroscopy, scanning electron microscopy, Fourier Infrared Spectroscopy, and X-Ray Diffraction analysis. The outcomes suggest that the characteristics of the ZnO NPs are influenced by the concentration of the reducing agent during the synthesis process. Notably, the ZnO NPs synthesized with a higher concentration of reducing agent exhibited a narrower optical band gap and increased surface energy. Furthermore, employing a concentration of 0.5 v/v resulted in the rapid production of nanoparticles with relatively uniform sizes. Conversely, concentrations below 0.5 v/v lead to slow formation, while concentrations exceeding 0.5 v/v yielded non-uniform nanoparticles.

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“…[33] and Toma et.al. [34] studied structural, electrical and optical properties of ZnO/Cu/ZnO multilayer film stacking using Cu film as a sandwich layer. The results showed that ZnO/Cu/ZnO multilayer film has good crystalline properties and with an increasing Cu layer thickness, a visible light transmittance of the multilayer film is reduced, while the electrical performance improved significantly.…”

Section: Introductionmentioning

confidence: 99%

Study the Effect of ZnO/Cu/ZnO Multilayer Structure by RF Magnetron Sputtering For Flexible Display Applications

Das¹,

Roymahapatra²,

Nandi³

et al. 2021

ES Mater. Manuf.

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ZnO/Cu/ZnO multilayer structured glass and Polyethylene naphthalate (PEN) with different thickness of copper (Cu) layer were prepared by RF magnetron sputtering at room temperature. The electrical resistivity of the films were achieved 8.610 -5 •cm and 4.510 -4 •cm, carrier concentration of 5.3210 21 cm -3 and 1.3610 21 cm -3 , low sheet resistance of 12 /cm 2 and 16 /cm 2 respectively on glass and PEN substrate respectively with optical transmission of more than 80% for both cases at the optimum copper layer thickness. Conduction mechanism of the multilayer structure has been explained in terms of metal to oxide carrier injection with the variation of the thickness of the Cu layer. Different optimization procedures were used to achieve good optically transparent and electrically conductive films. The structural characterizations of multilayer films were carried out by X-ray diffraction (XRD); surface morphology, and topography were performed by scanning electron microscopy (SEM) and atomic force microscopy (AFM) respectively. The value of sheet resistance of the structure was influenced by the deposition condition of both layers. Effect of substrate and thickness of the Cu layer was investigated and illustrated.

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Structural and optical characterization of Cu doped ZnO thin films deposited by RF magnetron sputtering

Cited by 9 publications

References 20 publications

Efficient Charge Transfer in MAPbI3 QDs/TiO2 Heterojunctions for High-Performance Solar Cells

Efficient Charge Transfer in MAPbI3 QDs/TiO2 Heterojunctions for High-Performance Solar Cells

Effect of Orange Fruit Peel Extract Concentration on the Synthesis of Zinc Oxide Nanoparticles

Study the Effect of ZnO/Cu/ZnO Multilayer Structure by RF Magnetron Sputtering For Flexible Display Applications

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