Fabrication and Application of Different Nanostructured ZnO in Ultraviolet Photodetectors: A Review

Chu, Lingling; Xu, Chao; Zeng, Wei; Nie, Chao; Hu, Yunxue

doi:10.1109/jsen.2022.3158650

Cited by 25 publications

(9 citation statements)

References 116 publications

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“…From the previous reports, we can infer that devices like nanostructure-based ZnO UV PDs and advanced nanowire-based and heterojunction-based devices as well as ternary oxide structure (A x B y O z )-based ZnO UV PDs are well accepted. Recently, one review article also discussed about how various morphologies and their fabrication methods influenced the UV detection property of ZnO . Hu et al reviewed the roles of surface modification, doping, and heterostructure engineering in improving the performance of ZnO UV PDs .…”

Section: Introduction To Ultraviolet (Uv) Photodetectors (Pds)mentioning

confidence: 99%

“…Recently, one review article also discussed about how various morphologies and their fabrication methods influenced the UV detection property of ZnO. 16 Hu et al reviewed the roles of surface modification, doping, and heterostructure engineering in improving the performance of ZnO UV PDs. 17 As cited above, the review articles appearing so far mainly focused on ZnO-based PDs referring to all of the conventional fabrication methods like sputtering, chemical and physical vapor deposition, sol gel, etc.…”

Section: Introduction To Ultraviolet (Uv) Photodetectors (Pds)mentioning

confidence: 99%

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Recent Advances in Solution-Processed Zinc Oxide Thin Films for Ultraviolet Photodetectors

Madhavanunni Rekha,

Vadakke Neelamana,

Bhat

2023

ACS Appl. Electron. Mater.

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Zinc oxide (ZnO) is versatile among semiconducting metal oxides with properties such as high photosensitivity, highly tunable specific surface area, nontoxicity, piezoelectricity, almost 85% optical transparency in the visible region, large exciton binding energy, and good biocompatibility. ZnO also shows excellent chemical and thermal stability. This n-type semiconducting material finds several applications in optoelectronic devices such as photodetectors (PDs) due to its wide and direct band gap. Beyond these, the nanostructured ZnO shows unique and tunable properties suitable for flexible and wearable devices. Recently, solution-based deposition techniques have achieved device-quality films at a low cost. This is mainly because the ease of intermixing and controlling the stoichiometry of the precursors is possible with a variety of solution-based synthesis methods, unlike physical deposition methods. This review summarizes the recent developments related to solutionderived ZnO-based thin films for ultraviolet (UV) detector applications. The different strategies used for the fabrication of UV detectors, major improvements achieved with solution-processed ZnO thin films of different morphologies, and their UV photoresponse behavior while in conjugation with other potential materials are discussed in this Review. However, a few shortcomings of the solution-based ZnO thin films, such as low quality and high defect density, remain challenges for the advancement of UV PD application. Thus, this Review concludes with a brief overview of such challenges and an outlook on the emerging research directions toward improving the capabilities of solution-processed ZnO-based UV detectors for various purposes.

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Section: Introduction To Ultraviolet (Uv) Photodetectors (Pds)mentioning

confidence: 99%

Section: Introduction To Ultraviolet (Uv) Photodetectors (Pds)mentioning

confidence: 99%

Recent Advances in Solution-Processed Zinc Oxide Thin Films for Ultraviolet Photodetectors

Madhavanunni Rekha,

Vadakke Neelamana,

Bhat

2023

ACS Appl. Electron. Mater.

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“…Moreover, the rising time (τ r ) and declining time (τ d ) of the photocurrent keep the same at 1 and 10 Hz but become different with τ r > τ d at 100 Hz. For the nanowires, the I max , response current and response time are 83.59 μA, 82.65 μA, 2.0 ms, respectively, in a sensitivity of 87.93 at the frequency of 1 Hz, which is more sensitive and faster than many reported photodetectors based on ZnO nanostructures [30,31]. The current intensity and sensitivity Fig.…”

Section: Optical Propertiesmentioning

confidence: 83%

Modulation of ZnO Nanostructure for Efficient Photocatalytic Performance

et al. 2022

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Structure has been considered to play an important role in photocatalytic performance of the semiconductors, but the intrinsic factors were rarely revealed. Herein, ZnO nanomaterials in the structures of thin film, nanowire array and nanosheet array were synthesized, and their structural characteristics, optical properties, photocurrent response and photocatalytic efficiency were compared with each other for illustrating the issue. The photoluminescence intensity decreased in the order of nanosheets, thin film and nanowires for improved lifetime of the photoexcited charges. The absorption of the nanosheets and nanowires improved obviously in the visible range with a redshift of the absorption edge than that of the thin film. The nanowires possessed the highest response current of 82.65 μA at a response time of 2.0 ms in a sensitivity of 87.93 at the light frequency of 1 Hz, and gained the largest catalytic efficiency of 2.45 μg/cm2 h for the methylene blue degradation in UV light. Nevertheless, the improvement of catalytic efficiency of the nanosheets (up to 42.4%) was much larger than that of nanowires (5.7%) and thin film (2.6%) for the Au coating. The analysis revealed that the photocatalytic efficiency of the ZnO nanomaterials was modulated by the structure as it contained different surface area, roughness, defect and doping states, vacancies, polar and non-polar crystalline faces, which would provide structural design of semiconductor nanomaterials for the photoelectric and photocatalytic applications.

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“…In 1954, Mollow reported for the first time the UV detection property of ZnO [30]. Since that time, many studies focused on zinc oxide as a detector of ultraviolet radiation, and tried to raise its efficiency in that through many strategies, such as preparing it in nano-forms or doping it with different materials [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of UV detection properties of ZnO thin films via Ni doping

Aboud

Bukhari²,

Al-Ahmad

2023

Phys. Scr.

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In this work pure and Ni-doped ZnO thin films have been deposited onto glass substrates using the spray pyrolysis technique. All films were deposited at constant deposition parameters but the Ni content was changed from 0 to 7 weight (wt) %. XRD results revealed the formation of a hexagonal ZnO phase whilst no other phases were detected. The crystallite size was determined using Scherrer's equation and found to be 45.9 nm for the pure film. Scanning electron microscope images show the formation of irregular grains with a broad size distribution. The existence of Ni in the deposited films was confirmed using energy dispersive spectroscopy (EDX), where the Ni content in the film increases as the weight % increases in the starting solution. The optical band gap was determined and found to be 3.3 eV for the pure ZnO films, which was reduced with Ni doping. The performance of the deposited films for UV radiation has been examined for the 365 nm wavelength and at different applied potentials and constant power. The rise and decay times for doped films were observed to exhibit faster rise/recovery as compared to pure films. The minimum response time was found to be 0.09 s for Ni-7wt% film and the minimum decay time is 0.07 s for Ni-1wt%.

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Fabrication and Application of Different Nanostructured ZnO in Ultraviolet Photodetectors: A Review

Cited by 25 publications

References 116 publications

Recent Advances in Solution-Processed Zinc Oxide Thin Films for Ultraviolet Photodetectors

Recent Advances in Solution-Processed Zinc Oxide Thin Films for Ultraviolet Photodetectors

Modulation of ZnO Nanostructure for Efficient Photocatalytic Performance

Enhancement of UV detection properties of ZnO thin films via Ni doping

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