Photovoltaic activity of WSe2/Si hetero junction

Pataniya, Pratik M.; Zankat, Chetan K.; Tannarana, Mohit; Patel, A.; Som, Narayan N.; Solanki, G. K.; Patel, K. C.; Jha, Prafulla K.; Pathak, V. M.

doi:10.1016/j.materresbull.2019.110602

Cited by 44 publications

(27 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…XRD patterns of electrocatalyst on ITO coated glass substrate show the peaks of 2H‐WSe 2 lattice structure, WO 3−x phase as well as peaks of the ITO layer. Peaks of WSe 2 phase are nicely indexed to hexagonal lattice structure with lattice constant a = 3.291 Å and c = 12.982 Å with (002) preferred orientation, observed at Bragg's angle of 13.4°, which agrees well with previous work 32,36 . Other peaks with orientation (103), (105), (006) and (008) are also indexed to 2H‐WSe 2 phase.…”

Section: Resultssupporting

confidence: 88%

“…Peaks of WSe 2 phase are nicely indexed to hexagonal lattice structure with lattice constant a = 3.291 Å and c = 12.982 Å with (002) preferred orientation, observed at Bragg's angle of 13.4 , which agrees well with previous work. 32,36 Other peaks with orientation (103), ( 105), ( 006) and (008) are also indexed to 2H-WSe 2 phase. However, peaks positions are slightly shifted towards the lower angle side which is attributed to increment in d-spacing values of lattice plane due to lattice softening with heat treatment, further confirming the formation of Se-vacancies.…”

Section: Resultsmentioning

confidence: 99%

“…As shown in Figure S7, pristine WSe 2 , WSe 2 /WO 3Àx and WO 3Àx show the lightharvesting abilities over a broad spectral range, attributing the photosensitive nature due to possible excitonic resonances of 2H-WSe 2 and plasmonic resonances of WO 3Àx phase. 25,32,36 Being an electrocatalytically active material, WO 3Àx effectively participates in the charge transfer to the electrolyte to produce hydrogen gas. Photogenerated electrons generated in WSe 2 , as well as electron injection from WO 3Àx , also help in the photoresponse of WSe 2 /WO 3ÀX electrode.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Enhanced electrocatalysis of WSe ₂ nanosheets by partial oxidation for hydrogen generation

Pataniya

Yang

et al. 2022

Intl J of Energy Research

Self Cite

View full text Add to dashboard Cite

Pristine WSe 2 based electrocatalyst shows poor reaction kinetics in electrochemical hydrogen evolution reaction due to a lack of active atomic sites and an inert basal plane. Herein, we report an active system of non-metallic plasmonic WSe 2 /WO 3Àx , supported by highly conductive and eco-friendly Ag/cellulose paper electrodes. An air thermal annealing technique is used to enrich the p-WO 3Àx dopants in WSe 2 , which is significant for substantially improving electrocatalytic behaviour as well as photo responsive performance in the near-infrared (NIR) region. The WSe 2 /WO 3Àx dramatically decreases the overpotential of HER from À330 to À150 mV (at 10 mA/cm 2 ) owing to homo doping and generation of Se-vacancies. Surface plasmons resonances of p-WO 3Àx give the contributions to injection of photogenerated electrons and overpotential as low as À120 mV can be achieved under the illumination of NIR light. These results represent significant advances in light-enhanced electrocatalysis and would provide potential applications for commercial hydrogen generation.Novelty Statement: Novel WSe 2 /WO 3ÀX hybrid nanosheets-based electrocatalysts exhibit the light-enhanced hydrogen evolution reaction. WO 3ÀX enriched WSe 2 nanosheets exhibit rapid electrochemical charge transport due to p-homodoping and Se-vacancies. Overall, the 3D-porous structure of cellulose paper and 2D-WSe 2 /WO 3ÀX leads the promising optimisation.

show abstract

Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced electrocatalysis of WSe ₂ nanosheets by partial oxidation for hydrogen generation

Pataniya

Yang

et al. 2022

Intl J of Energy Research

Self Cite

View full text Add to dashboard Cite

show abstract

“…Efficiency and cost have emerged as key metrics for any alternate technology. TMDC-based PV devices with good performance and tunability have been demonstrated [110,[120][121][122][123][124][125]. The following discussion on several studies on 2D-PV devices helps us get an idea of the current status and future path for the field.…”

Section: Photovoltaicsmentioning

confidence: 98%

Optoelectronic and photonic devices based on transition metal dichalcogenides

Thakar

Lodha

2020

Mater. Res. Express

View full text Add to dashboard Cite

Transition metal dichalcogenides (TMDCs) are a family of two-dimensional layered materials (2DLMs) with extraordinary optical properties. They present an attractive option for future multifunctional and high-performance optoelectronics. However, much remains to be done to realize a mature technology for commercial applications. In this review article, we describe the progress and scope of TMDC devices in optical and photonic applications. Various photoresponse mechanisms observed in such devices and a brief discussion on measurement and analysis methods are described. Three main types of optoelectronic devices, namely photodetectors, photovoltaics and lightemitting devices are discussed in detail with a focus on device architecture and operation. Examples showing experimental integration of 2DLM-based devices with silicon photonics are also discussed briefly. A wide range of data for key performance metrics is analysed with insights into future directions for device design, processing and characterization that can help overcome present gaps and challenges. While the field is still in its infancy and requires significant efforts toward standardizing various approaches towards a mature technology, it has already shown promising results in broader aspects of compatibility, integration and performance for future electronics. Sensors are increasingly becoming an integrated part of the global electronic eco-system with the rise of data-driven technologies. There is a growing need for networks of cost-effective, robust and reliable sensors and their integration with present technologies. Optoelectronic and photonic devices are of importance for both sensing as well as high-speed optical communication applications. 2DLMs demonstrate significant light-matter interaction that is tunable with external physical and electronic parameters such as pressure, strain, electric and magnetic field [1-6]. Moreover, 2DLMs show strong dependence of their band structure on thickness with a transition to direct bandgap in monolayers in most of the known 2DLMs [7][8][9]. Graphene has been the most studied material since its discovery in 2004 [10][11][12]. Apart from graphene, there are nearly 1500 possible 2DLMs with a wide range of material properties as predicted by first principle simulations [13]. Transition metal dichalcogenides (TMDCs) are a family of 2DLMs in the form of MX 2 compounds, where M is a transition metal (Mo, W, Re) and X is a chalcogen (S, Se, Te). TMDCs are promising for electronic applications due to their semiconducting behaviour as opposed to semi-metallic graphene, and better thermal stability than materials such as black phosphorus and silicene [14][15][16][17][18][19]. Optoelectronic devices based on TMDCsTMDCs have been the most studied 2DLMs, apart from graphene and black phosphorus, for electronic and optoelectronic device applications [20,21]. They have a sizeable bandgap in the visible and near infrared (NIR) range (∼1-2 eV) that is optimal for optoelectronic sensors and light-emitting sources for short-ran...

show abstract

“…And the response range of the asfabricated devices was 370-1064 nm, while the responsivity could reach up to 0.92 A W −1 , along with the maximum EQE of 180%. Also, Pataniya's group [91] designed a WSe 2 /Si hetero junction, with an ideality factor of 1.21 and a faster response time of 32 ms (compared with Zheng's 0.9 s).…”

Section: Other Mo-and W-dichalcogenide-based Devicesmentioning

confidence: 99%

Recent progress in optoelectronic applications of hybrid 2D/3D silicon-based heterostructures

et al. 2021

View full text Add to dashboard Cite

Silicon-based semiconductor technology has made great breakthroughs in the past few decades, but it is reaching the physical limits of Moore's law. In recent years, the presence of two-dimensional (2D) materials was regarded as an opportunity to break the limitation of traditional siliconbased optoelectronic devices owing to their special structure and superior properties. In consideration of the widely studied hybrid integration of 2D material detectors and 3D siliconbased systems, in this paper, the basic properties of several 2D materials used in photodetectors are summarized. Subsequently, the progress in silicon photonic integrated photodetectors based on 2D materials is reviewed, followed by the summarization of the device structure and main performances. Then, the combination of some other traditional and 2D devices is discussed as a supplement. Finally, the prospective development of the hybrid 2D/3D silicon-based heterostructures is expected.

show abstract

Photovoltaic activity of WSe2/Si hetero junction

Cited by 44 publications

References 42 publications

Enhanced electrocatalysis of WSe ₂ nanosheets by partial oxidation for hydrogen generation

Enhanced electrocatalysis of WSe ₂ nanosheets by partial oxidation for hydrogen generation

Optoelectronic and photonic devices based on transition metal dichalcogenides

Recent progress in optoelectronic applications of hybrid 2D/3D silicon-based heterostructures

Contact Info

Product

Resources

About

Photovoltaic activity of WSe2/Si hetero junction

Cited by 44 publications

References 42 publications

Enhanced electrocatalysis of WSe 2 nanosheets by partial oxidation for hydrogen generation

Enhanced electrocatalysis of WSe 2 nanosheets by partial oxidation for hydrogen generation

Optoelectronic and photonic devices based on transition metal dichalcogenides

Recent progress in optoelectronic applications of hybrid 2D/3D silicon-based heterostructures

Contact Info

Product

Resources

About

Enhanced electrocatalysis of WSe ₂ nanosheets by partial oxidation for hydrogen generation

Enhanced electrocatalysis of WSe ₂ nanosheets by partial oxidation for hydrogen generation