Rectifying properties of ZnO thin films deposited on FTO by electrodeposition technique

Lv, Jianguo; Sun, Yue; Zhao, Min; Cao, Li; Xu, Jiayuan; He, Gang; Zhang, Miao; Sun, Zhaoqi

doi:10.1016/j.apsusc.2016.01.104

Cited by 24 publications

(6 citation statements)

References 49 publications

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“…The rectification ratio (RR) of the forward current ( ) to the reverse current ( ) at ∓2 V applied voltage was calculated and given in Table 2. The reverse current is as large as the forward current as the increase of bias and the calculated values are larger than other related works in the literature [39][40][41].…”

Section: Journal Of Nanomaterialscontrasting

confidence: 52%

Influence of Irradiation Time on Structural, Morphological Properties of ZnO-NRs Films Deposited by MW-CBD and Their Photodiode Applications

Ilıcan

Görgün

Çağlar

et al. 2017

Journal of Nanomaterials

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Microwave-assisted chemical bath deposition (MW-CBD) was used to deposit zinc oxide nanorods (ZnO-NRs) films by using different microwave irradiation time. The films exhibit a good crystallinity having a hexagonal wurtzite phase formation. Although the dominant preferred orientation was not observed for the ZnO-5 and ZnO-10, ZnO-8 showed (002) preferred orientation. The emission scanning electron microscope (FESEM) showed almost randomly oriented hexagonal nanorods on the surface. A slight decrease in the length of the observed hexagonal nanorods due to the increase in the irradiation time was observed, changing from 550 nm to 300 nm. The p-Si/n-ZnO-NRs heterojunction photodiodes were fabricated. The current-voltage characteristics of these photodiodes were investigated under dark and different illumination intensity. An increase in the reverse current with increasing illumination intensity confirmed that the fabricated photodiodes exhibited a photoconducting behavior. In addition, the barrier height and series resistance values of the photodiodes were determined from capacitance-voltage measurements.

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Section: Journal Of Nanomaterialscontrasting

confidence: 52%

Influence of Irradiation Time on Structural, Morphological Properties of ZnO-NRs Films Deposited by MW-CBD and Their Photodiode Applications

Ilıcan

Görgün

Çağlar

et al. 2017

Journal of Nanomaterials

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“…Particularly, a green emission band appears at approximately 2.5 eV in ZnO-P, which is similar to that of a ZnO film deposited on MgO(100) [ 49 ]. In general, oxygen vacancies [ 50 ], surface morphology [ 47 , 51 ], and oxygen clusters formed on the surface [ 52 ] are major origins for the green emission band. ZnO films with densely vertically aligned ZnO nanorods have been reported to possess stronger green emission bands relative to films with small particle and nanosheet morphologies [ 47 ].…”

Section: Discussionmentioning

confidence: 99%

Tuning the Surface Morphologies and Properties of ZnO Films by the Design of Interfacial Layer

Wang

Zhou

et al. 2017

Nanoscale Res Lett

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Wurtzite ZnO films were grown on MgO(111) substrates by plasma-assisted molecular beam epitaxy (MBE). Different initial growth conditions were designed to monitor the film quality. All the grown ZnO films show highly (0001)-oriented textures without in-plane rotation, as illustrated by in situ reflection high-energy electron diffraction (RHEED) and ex situ X-ray diffraction (XRD). As demonstrated by atomic force microscopy (AFM) images, “ridge-like” and “particle-like” surface morphologies are observed for the ZnO films grown in a molecular O2 atmosphere with and without an initial deposition of Zn adatoms, respectively, before ZnO growth with oxygen plasma. This artificially designed interfacial layer deeply influences the final surface morphology and optical properties of the ZnO film. From room-temperature photoluminescence (PL) measurements, a strong defect-related green luminescence band appears for the ZnO film with a “particle-like” morphology but was hardly observed in the films with flat “ridge-like” surface morphologies. Our work suggests that the ZnO crystallinity can be improved and defect luminescence can be reduced by designing interfacial layers between substrates and epilayers.Electronic supplementary materialThe online version of this article (10.1186/s11671-017-2301-8) contains supplementary material, which is available to authorized users.

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“…Reaction (1) describes the reduction of NO 3 -at the working electrode in Zn 2+ aqueous solution, then, those Zn 2+ react with the OH -íons formed in the reductionreaction, resulting in zinc hydroxide (Reaction 2). The Zn(OH) 2 suffers dehydration, and consequently, it occurs the chemical precipitation of ZnO (Reaction 3) 17 . The hydroxylation and the dehydration control the rate of the overall reaction and are affected, mainly, by the temperature, Zn(NO 3 ) 2 .6H 2 O concentration and the applied potential in the electrodeposition 17 .…”

Section: Electrodeposition Processmentioning

confidence: 99%

“…The Zn(OH) 2 suffers dehydration, and consequently, it occurs the chemical precipitation of ZnO (Reaction 3) 17 . The hydroxylation and the dehydration control the rate of the overall reaction and are affected, mainly, by the temperature, Zn(NO 3 ) 2 .6H 2 O concentration and the applied potential in the electrodeposition 17 . As the temperature and concentration were kept constant for the three films, in this study, the differences on the reaction rate and, by consequence, the morphology of the films were affected by the different potentials.…”

Section: Electrodeposition Processmentioning

confidence: 99%

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Effects of Potential Deposition on the Parameters of ZnO dye-sensitized Solar Cells

et al. 2018

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Dye-sensitized solar cells (DSSCs) are a feasible option for photovoltaic energy. Zinc oxide is an n-type semiconductor employed as photoanode on DSSCs. ZnO thin films were electrodeposited to study the effects of different potentials applied during deposition. SEM images, XRD and UV-Vis analysis were conducted to reveal the morphologic, structural and optical properties of the films at three potentials. DSSCs were assembled and the photovoltaic parameters were obtained through J-V plots. DSSC with 0.031% of efficiency was demonstrated at -1.4 V of deposition potential.

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Rectifying properties of ZnO thin films deposited on FTO by electrodeposition technique

Cited by 24 publications

References 49 publications

Influence of Irradiation Time on Structural, Morphological Properties of ZnO-NRs Films Deposited by MW-CBD and Their Photodiode Applications

Influence of Irradiation Time on Structural, Morphological Properties of ZnO-NRs Films Deposited by MW-CBD and Their Photodiode Applications

Tuning the Surface Morphologies and Properties of ZnO Films by the Design of Interfacial Layer

Effects of Potential Deposition on the Parameters of ZnO dye-sensitized Solar Cells

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