Fast response and high sensitive photoelectrochemical ultraviolet detectors based on electrospinning SrTiO3 nanowires

Bai, Zhaowen; Zhu, Ziran; Wang, Gang; Wu, Hongchang; Wang, Youqing; Zhou, Jinyuan; Li, Jian; Pan, Xiao Jun; Xie, Erqing

doi:10.1007/s00339-022-05542-9

Cited by 10 publications

(2 citation statements)

References 45 publications

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“…The OCVD curves of the TiO 2 @Al 2 O 3 NWs detectors were measured under 1 mW cm −2 irradiance at 365 nm, as shown in figure 8(a). Figure 8(b) shows the corresponding electron lifetime of the TiO 2 @Al 2 O 3 NWs detectors, which can be described by the following equation [50,51]:…”

Section: Resultsmentioning

confidence: 99%

Preparation of a flexible photoanode of the photoelectrochemical ultraviolet photodetector based on rutile TiO₂ nanowires and the suppressed charge recombination at solid/liquid interface

Wang,

Ji,

et al. 2023

J. Phys. D: Appl. Phys.

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Flexible ultraviolet (UV) photodetector exhibits a promising application in portable electronic gadgets, display devices and biomedical imaging. In this study, a flexible photoanode of the photoelectrochemical (PEC)-type UV photodetector based on rutile TiO2 nanowires (TiO2 NWs) grown on carbon fiber cloth is realized. In photovoltaic applications, an insulating layer is usually introduced to suppress interfacial recombination and reduce the surface trap states. The interfacial recombination of semiconductor/electrolyte is suppressed by coating an Al2O3 barrier layer on the TiO2 NWs. The photodetectors of the TiO2@Al2O3 NWs show stable photocurrent, a high light/dark current ratio (I light/I dark) of 1170, a faster rise and decay response times of 0.09 and 0.09 s, and excellent spectral selectivity from 300 to 400 nm. The peak responsivity of the photodetectors reaches 2.8 mA W−1 at 360 nm. This flexible photoanode have a potential application in wearable PEC UV photodetector.

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Section: Resultsmentioning

confidence: 99%

Preparation of a flexible photoanode of the photoelectrochemical ultraviolet photodetector based on rutile TiO₂ nanowires and the suppressed charge recombination at solid/liquid interface

Wang,

Ji,

et al. 2023

J. Phys. D: Appl. Phys.

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“…The ultraviolet (UV) detector converts UV light signals into measurable signals, and is widely used in storage, sensing communication and so on [1][2][3][4]. Compared with traditional solid-state UV detectors, the photoelectrochemical (PEC) based UV detectors have the advantages of low cost, simple fabrication process and high sensitivity [5][6][7][8]. The PEC UV detectors utilize an aqueous electrolyte, which has potential applications in underwater detection and communication [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Ag-modified enhance the performances of ZnO@CFs based omnidirectional photoelectrochemical ultraviolet detectors

Zhang,

Li,

Wang

et al. 2024

Nanotechnology

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There are several prospective applications for omnidirectional ultraviolet (UV) detectors and underwater detection detectors in optical systems and optical fields. In this work, ZnO nanorods arrays were grown on carbon fibers (CFs). An appropriate amount of Ag nanoparticles (NPs) was deposited on the surface of ZnO nanorods by photochemical deposition. This improved the performance of photoelectrochemical (PEC) based UV detectors. Under 365 nm and 10 mW cm-2 UV irradiation, the photocurrent density of the 30s-Ag/ZnO@CFs based PEC UV detector can reach 1.28 mA cm-2, which is about 7 times that of the ZnO@CFs based PEC UV detector, and the rising time is shortened from 0.17 s to 0.10 s. The reason is that increased absorption of ultraviolet light induced by the localized surface plasmon resonance. In addition, the detector exhibits a good flexibility and remains flexible after hundreds of bends and twists. Moreover, the detector is responsive in the range of rotation angle from 0 to 360°. It provides an insight to improve the photoelectric performance and underwater omnidirectional detection ability of the PEC UV detector.

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Achieving High Responsivity of Photoelectrochemical Solar‐Blind Ultraviolet Photodetectors via Oxygen Vacancy Engineering

Zhang

et al. 2022

Advanced Optical Materials

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military and daily life. [1] Various widebandgap semiconductors with diverse morphologies [2] and nanostructures, [3] have been developed for SBUV PDs. Recently, photoelectrochemical-type (PEC) PDs have been booming due to the low-cost fabrication, low-quality requirement of materials, good self-powered capability, and high sensitivity. [4] Compared with traditional solid-state SBUV PDs, PEC SBUV PDs not only depend on the internal charge transport of semiconductors but also rely on the charge transfer at the interface between semiconductors and electrolyte, offering more freedom to regulate the photoresponse performance. Several widebandgap semiconductors with various nanostructures, such as Ga 2 O 3 nanorods [5] and AlGaN nanowires, [6] have been investigated for PEC SBUV PDs. However, the corresponding photoresponse is much lower than expected. Several strategies have been proposed to improve the performance of PEC SBUV PDs, such as surface modification of noble metal nanoparticles [6b,c] and the construction of core-shell heterojunctions, [7] which inevitably increase the fabrication cost. Therefore, it is attractive to explore alternative and low-cost strategies for promoting the photoresponse of PEC SBUV PDs.Tin oxide (SnO 2 ) is an n-type wide-bandgap (E g = 3.6 eV) semiconductor with the merits of superior electron transport properties and good stability in the environment, [8] endowing SnO 2 an attractive candidate for gas sensors, [9] electrocatalysts, [10] solar cells, [11] lithium-ion batteries, [12] and SBUV PDs. [13] Traditional solid-state SBUV PDs based on various SnO 2 nanostructures [14] and heterojunctions [15] have been exploited with good performance, certainly demonstrating their potential application in UV PDs. However, PEC SBUV PDs based on individual SnO 2 nanostructures have rarely been investigated. [16] Most studies focus on utilizing the good electron transport properties of SnO 2 to improve the photoresponse of other wide-bandgap semiconductor-based PEC SBUV PDs (such as TiO 2 and ZnO) [17] by constructing heterostructures. Although SnO 2 nanoparticles-based PEC PDs have been investigated, they show poor photoresponse with a low responsivity Tin oxide (SnO 2 ) is an n-type wide-bandgap semiconductor with the merits of superior electron transport properties and good stability, making it an attractive candidate for solar-blind ultraviolet photodetectors (SBUV PDs). However, it is still challenging to design high-performance SnO 2 -based photoelectrochemical (PEC)-type SBUV PDs. In this study, oxygen vacancies (OVs) engineering is proposed to manipulate the photoresponse of SnO 2 nanosheets (NSs) and high-performance SnO 2 -based PEC SBUV PDs are developed. SnO 2 NSs with different OVs are prepared by hydrothermal method with annealing process. PEC PDs consisting of SnO 2 NSs annealed at 550 °C show record high responsivity and specific detectivity of 269.40 mA W −1 and 2.38 × 10 12 Jones at a bias voltage of 0.2 V, respectively, surpassing all aqueous-type PEC UV PDs. OVs simulta...

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Fast response and high sensitive photoelectrochemical ultraviolet detectors based on electrospinning SrTiO3 nanowires

Cited by 10 publications

References 45 publications

Preparation of a flexible photoanode of the photoelectrochemical ultraviolet photodetector based on rutile TiO₂ nanowires and the suppressed charge recombination at solid/liquid interface

Preparation of a flexible photoanode of the photoelectrochemical ultraviolet photodetector based on rutile TiO₂ nanowires and the suppressed charge recombination at solid/liquid interface

Ag-modified enhance the performances of ZnO@CFs based omnidirectional photoelectrochemical ultraviolet detectors

Achieving High Responsivity of Photoelectrochemical Solar‐Blind Ultraviolet Photodetectors via Oxygen Vacancy Engineering

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Fast response and high sensitive photoelectrochemical ultraviolet detectors based on electrospinning SrTiO3 nanowires

Cited by 10 publications

References 45 publications

Preparation of a flexible photoanode of the photoelectrochemical ultraviolet photodetector based on rutile TiO2 nanowires and the suppressed charge recombination at solid/liquid interface

Preparation of a flexible photoanode of the photoelectrochemical ultraviolet photodetector based on rutile TiO2 nanowires and the suppressed charge recombination at solid/liquid interface

Ag-modified enhance the performances of ZnO@CFs based omnidirectional photoelectrochemical ultraviolet detectors

Achieving High Responsivity of Photoelectrochemical Solar‐Blind Ultraviolet Photodetectors via Oxygen Vacancy Engineering

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Preparation of a flexible photoanode of the photoelectrochemical ultraviolet photodetector based on rutile TiO₂ nanowires and the suppressed charge recombination at solid/liquid interface

Preparation of a flexible photoanode of the photoelectrochemical ultraviolet photodetector based on rutile TiO₂ nanowires and the suppressed charge recombination at solid/liquid interface