Abnormal photoelectrical properties and gas sensing of mesoporous Sn0.9Ti0.1O2 film under UV light

Lin, Zhidong; Guo, Chunliang; Fu, Qiuming; Song, Wenlong

doi:10.1016/j.matlet.2013.03.104

Cited by 9 publications

(5 citation statements)

References 23 publications

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“…Additionally, in the absence of a post-annealing process, nearly all adsorbed O 2 molecules desorb, which accounts for the significantly higher resistance observed in the unannealed heterostructure compared to the post-annealed samples. Similar behavior has been reported in the previous literature. , The generated photocurrent in our case is higher than that reported in MoO 3 /graphene structures, TiO 2 -decorated graphene, and FePS 3 UV PD …”

Section: Resultssupporting

confidence: 92%

“…literature. 24,63 The generated photocurrent in our case is higher than that reported in MoO 3 /graphene structures, 24 TiO 2decorated graphene, 61 and FePS 3 UV PD. 60 In contrast to the behavior observed under light irradiation, the absence of light resulted in the adsorption of some O 2 molecules onto the material's surface.…”

Section: ■ Results and Discussioncontrasting

confidence: 60%

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High-Performance Negative Self-Powered α-MoO₃/Ir/α-MoO₃ Photodetectors: Probing the Influence of Coulomb Deep Traps

Basyooni,

Tihtih,

Zaki

et al. 2023

ACS Appl. Electron. Mater.

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Nanostructures of ultrathin 2D MoO3 semiconductors have gained significant attention in the field of transparent optoelectronics and nanophotonics due to their exceptional responsiveness. In this study, we investigate self-powered α-MoO3/Ir/α-MoO3 photodetectors, focusing on the influence of induced hot electrons in ultrathin α-MoO3 when combined with an ultrathin Ir plasmonic layer. Our results reveal the presence of both positive and negative photoconductivity at a 0 V bias voltage. Notably, by integrating a 2 nm Ir layer between post-annealed α-MoO3 films, we achieve remarkable performance metrics, including a high I ON/I OFF ratio of 3.8 × 106, external quantum efficiency of 132, and detectivity of 3.4 × 1011 Jones at 0 V bias. Furthermore, the response time is impressively short, with only 0.2 ms, supported by an exceptionally low MoO3 surface roughness of 0.1 nm. The observed negative photoresponse is attributed to O2 desorption from the MoO3 surface, resulting in increased carrier density and reduced mobility in the Ir layer due to Coulomb trapping and oxygen vacancy deep levels. Consequently, this leads to a decreased carrier mobility and diminished current in the heterostructure. Our findings underscore the enormous potential of ultrathin MoO3 semiconductors for high-performance negative conductivity optoelectronics and photonic applications.

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Section: Resultssupporting

confidence: 92%

Section: ■ Results and Discussioncontrasting

confidence: 60%

High-Performance Negative Self-Powered α-MoO₃/Ir/α-MoO₃ Photodetectors: Probing the Influence of Coulomb Deep Traps

Basyooni,

Tihtih,

Zaki

et al. 2023

ACS Appl. Electron. Mater.

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“…As has been reported, the kinetic rate of photocatalytic reactions can be varied from different temperature and light intensity [63], and heat is one problem. For the sake of practical application of photocatalysts in ambient environment, a set of coolers (mostly condensate water) is usually equipped to provide moderate temperature for laboratory-scale tests.…”

Section: Transient Local Heatmentioning

confidence: 99%

Function ofTiO2Lattice Defects toward Photocatalytic Processes: View of Electronic Driven Force

Cui

Liu

Shi

et al. 2013

International Journal of Photoenergy

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Oxygen vacancies and Ti-related defects (OTDs) are the main lattice defects ofTiO2, which have great influence on its photocatalytic activity. To understand the relationship between the defects and photocatalytic activities, detailed discussions based on the electronic driven force provided by these defects are carried out during the three commonly accepted processes in photocatalytic reactions. It is found that these defects inevitably (i) influence the energy structure of the pristineTiO2as the isolate acceptor/donor level or hybrid with the original orbital, (ii) provide a disordered short-range force that confuses the charge carriers transferring to surface active sites, (iii) act not only as the surface active sites for trapping the charge carriers but also as the main chemisorption sites forO2,H2O, and organic species. These effects of the defects make them one of the key factors that determine the efficiency of heterogeneous photocatalysis. Clarifying the role of the defects will further facilitate the exploration and the construction of high-performance photocatalysts for practical applications.

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“…Photo-induced intramolecular electron transfer has been widely investigated in bioscience [1], medicine design [2], radical cations [3,4], photoelectric sensors [5], solar cells [6]. Among them, utilizing visible light to achieve the real non-invasive therapy would be an ideal scenario for drug release in the selective cancer treatment.…”

Section: Introductionmentioning

confidence: 99%

Theoretical insight into photo-induced intramolecular electron transfer in heterodinuclear Ru(II)–Co(III) complexes

Shao

et al. 2015

Materials Chemistry and Physics

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Abnormal photoelectrical properties and gas sensing of mesoporous Sn0.9Ti0.1O2 film under UV light

Cited by 9 publications

References 23 publications

High-Performance Negative Self-Powered α-MoO₃/Ir/α-MoO₃ Photodetectors: Probing the Influence of Coulomb Deep Traps

High-Performance Negative Self-Powered α-MoO₃/Ir/α-MoO₃ Photodetectors: Probing the Influence of Coulomb Deep Traps

Function ofTiO2Lattice Defects toward Photocatalytic Processes: View of Electronic Driven Force

Theoretical insight into photo-induced intramolecular electron transfer in heterodinuclear Ru(II)–Co(III) complexes

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Abnormal photoelectrical properties and gas sensing of mesoporous Sn0.9Ti0.1O2 film under UV light

Cited by 9 publications

References 23 publications

High-Performance Negative Self-Powered α-MoO3/Ir/α-MoO3 Photodetectors: Probing the Influence of Coulomb Deep Traps

High-Performance Negative Self-Powered α-MoO3/Ir/α-MoO3 Photodetectors: Probing the Influence of Coulomb Deep Traps

Function ofTiO2Lattice Defects toward Photocatalytic Processes: View of Electronic Driven Force

Theoretical insight into photo-induced intramolecular electron transfer in heterodinuclear Ru(II)–Co(III) complexes

Contact Info

Product

Resources

About

High-Performance Negative Self-Powered α-MoO₃/Ir/α-MoO₃ Photodetectors: Probing the Influence of Coulomb Deep Traps

High-Performance Negative Self-Powered α-MoO₃/Ir/α-MoO₃ Photodetectors: Probing the Influence of Coulomb Deep Traps