Transparent p-NiO/n-ZnO heterojunction ultraviolet photodetectors prepared on flexible substrates

Huang, Jian; Li, Bing; Hu, Yan; Zhou, Xun; Zhang, Zilong; Ma, Yuncheng; Tang, Ke; Wang, Linjun; Lu, Yicheng

doi:10.1016/j.surfcoat.2019.01.099

Cited by 24 publications

(8 citation statements)

References 23 publications

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“…These photodetectors can be constructed directly on flexible substrates or fabricated on rigid substrates that can then be transferred. To date, various types of novel flexible photodetectors, including fully flexible and transparent photodetectors, have been demonstrated, increasing their potential as next-generation wearable sensors that support conformal electronic systems. − …”

Section: Introductionmentioning

confidence: 99%

Simple Template-Mediated Fabrication of ZnO Nanotube Arrays and Their Application in Flexible Ultraviolet Photodetectors

Chen

Tian

2023

ACS Appl. Nano Mater.

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ZnO, as an important semiconductor, has been extensively studied for a wide range of applications. To date, with the development of micro/nano manufacturing technology, various hierarchical ZnO nanostructures have been fabricated and explored, showing encouraging success in advanced photodetectors. ZnO nanotube structure has a high surface-to-volume ratio, and versatile hollow channels, which are promising for sensing applications. Typical nanotube arrays primarily rely on advanced nanofabrication technologies. Simple and low-cost fabrication strategies are still lacking. Herein, we report a simple template fabrication method to obtain vertically aligned ZnO nanotube arrays. Using flexible, etched polyimide membranes as the template, ZnO nanotube arrays can be prepared in situ by dip-coating the sample into a zinc acetate solution followed by heating. Different hierarchical ZnO nanotube structures were obtained with the nanotube arrays when the method was combined with hydrothermal growth. We have demonstrated that the structures may be used in flexible and transparent photodetectors. Our work provides a facile approach for fabricating ZnO nanotube arrays and expands the application of ZnO nanotube structures to flexible and transparent photodetectors.

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Section: Introductionmentioning

confidence: 99%

Simple Template-Mediated Fabrication of ZnO Nanotube Arrays and Their Application in Flexible Ultraviolet Photodetectors

Chen

Tian

2023

ACS Appl. Nano Mater.

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“…So, we investigated multilayer thin films as a ZnO heterojunction. The technological values of pÀn junctions with high quality have grown greatly and from this point on, their fabrication has become a considerable necessity in recent decade (Huang et al, 2019). On the other hand, some review studies such as study on nanocomposite and heterojunction photocatalysts made from ZnO and its combinations (Goktas & Goktas, 2021) indicates on multiple applications.…”

Section: Introductionmentioning

confidence: 99%

Evaluating structural, morphological, and multifractal aspects of n‐ZnO/p‐ZnO homojunctions and n‐ZnO/p‐NiO heterojunctions

Ghaderi

Shafiekhani

Ţălu

et al. 2023

Microscopy Res & Technique

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We have investigated the evolution of the structure and surface morphology of n‐ZnO/p‐ZnO homojunctions and n‐ZnO/p‐NiO heterojunctions transparent structures deposited by radio frequency‐sputtering on quartz (Q)/ITO substrates. X‐ray diffraction (XRD) analysis of the as‐deposited and annealed ZnO, n‐ZnO/p‐NiO/Q/ITO, and n‐ZnO/p‐ZnO/Q/ITO thin films showed that ZnO had a wurtzite hexagonal structure and (002) preferred growth direction. The annealing temperature played a key role in improving the crystalline structure of the films, as evidenced by the changes in the intensity and position of the XRD (002) peak. Morphological analysis revealed that the roughness of the film varies with increasing annealing temperature. Particle size dictates the vertical growth of p‐ZnO homojunctions, while particle shape dictated the p‐NiO heterojunctions growth. Fractal analysis showed that p‐ZnO homojunctions have similar spatial complexity, surface percolation, and topographical uniformity and are dominated by low dominant frequencies. Moreover, a robust multifractal character was observed, where n‐ZnO/p‐ZnO homojunctions follow similar vertical growth dynamics, which differed from the n‐ZnO/p‐NiO heterojunctions growth dynamics. These results prove that annealing temperature plays a key role in the n‐ZnO/p‐ZnO homojunctions and n‐ZnO/p‐NiO heterojunctions structure, surface morphology, and vertical growth dynamics.

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“…Blindness to visible light is highly desired by UV PDs, and wide bandgap semiconductors. Owing to their many outstanding properties such as wide band gap, low cost, strong radiation hardness and high chemical stability, ZnO-based oxides have been exploited as one of the most promising candidates for UV detectors [1][2][3][4][5][6][7][8][9]. Among already-exploited ZnO-based oxides, Ga doped ZnO (GZO) show improved electrical conducting properties [10][11][12] and extended effective band gap over 4.4 eV [12] with respect to pure ZnO.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Ga-doped ZnO thin-film ultraviolet photodetectors fabricated on patterned Si substrate

Wang

Peng

et al. 2019

Semicond. Sci. Technol.

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Ultraviolet (UV) photodetectors have demonstrated wide applications in both civil and military fields such as pollution monitoring and missile warning. ZnO-based UV photodetectors have attracted tremendous attention due to the advantages of low cost and high chemical and thermal stability. In this work, Ga-doped ZnO (GZO) films were grown with the technique of RF magnetron sputtering and metal-semiconductor-metal (MSM) UV detectors were fabricated with the GZO films as the active detection layers. The as-sputtered films were further treated by the means of thermal annealing such that reduced oxygen vacancy and improved crystallization were achieved for the films. The effect of patterned Si substrates on the GZO UV detectors performance was revealed for the first time. With optimized annealing temperature and delicately designed substrate patterns, the responsibility of GZO MSM photodetectors has been greatly enhanced (e.g. about 2.5-folds higher than ones fabricated on non-patterned Si substrate). Our work on the GZO material and the structural design may pave a new way towards developing low-cost but high-performance UV detectors.

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Transparent p-NiO/n-ZnO heterojunction ultraviolet photodetectors prepared on flexible substrates

Cited by 24 publications

References 23 publications

Simple Template-Mediated Fabrication of ZnO Nanotube Arrays and Their Application in Flexible Ultraviolet Photodetectors

Simple Template-Mediated Fabrication of ZnO Nanotube Arrays and Their Application in Flexible Ultraviolet Photodetectors

Evaluating structural, morphological, and multifractal aspects of n‐ZnO/p‐ZnO homojunctions and n‐ZnO/p‐NiO heterojunctions

Characteristics of Ga-doped ZnO thin-film ultraviolet photodetectors fabricated on patterned Si substrate

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