Hydrothermal synthesis of WSe2 films and their application in high-performance photodetectors

Wen, Ruchun; Wei, Aixiang; Tao, Lili; Luo, Dongxiang; Li, Jun; Yang, Yibin; Xiao, Zhiming; Liu, Zhen; Zhao, Yu

doi:10.1007/s00339-018-2059-6

Cited by 31 publications

(16 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To further investigate the bonding behavior, the as-prepared samples were scanned for Raman and photoluminescence spectra as well. As shown in Figure d, the isolated CoSe 2 and WSe 2 samples gave rise to characteristic Raman peaks at 169.79 and 247.87 cm –1 that are also manifested in the WSe 2 /CoSe 2 nanohybrids typically at 168 and 249.7 cm –1 for the corresponding Ag and E 2g 1 vibration modes of CoSe 2 and WSe 2 , ,, respectively. The Raman peaks of the WSe 2 /CoSe 2 nanohybrids match up well with those of the isolated components with slight negative and positive shifts for CoSe 2 and WSe 2 , respectively, demonstrating that there might be a slight lattice distortion or lattice change within the components of the nanohybrids, from which the lattice variation on the interface of the nanohybrids would be favorable for creating more active sites for electrochemical performance, as also supported by the HRTEM study (Figures a–c and S3c,d).…”

Section: Resultsmentioning

confidence: 87%

“…CoSe 2 and CoSe 2 -based composites and/or heteronanomaterials have been reported to exhibit outstanding performances for HERs, OERs, batteries, and supercapacitors. 19,40,41 Likewise, WSe 2 -based active materials have been used in photodetectors, energy production, batteries, and supercapacitors, 24,29,38,42,43 [15][16][17]44,45 The electronic interaction between the components of the nanoscale heterostructures was confirmed by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Raman techniques. The mutual hybridization of the components resulted in enhanced conductivity and increased surface area, thus providing efficient channels for electron transfer during HER and OER processes by exposing more active sites along with an increased conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…CoSe 2 and CoSe 2 -based composites and/or heteronanomaterials have been reported to exhibit outstanding performances for HERs, OERs, batteries, and supercapacitors. ,, Likewise, WSe 2 -based active materials have been used in photodetectors, energy production, batteries, and supercapacitors, ,,,, while few studies have reported use of WSe 2 /CoSe 2 as multifunctional active materials with excellent catalytic performance. Herein, we prepared nanohybrids of WSe 2 /CoSe 2 heterostructures via a hot-injection colloidal method by producing CoSe 2 nanoparticles well dispersed in WSe 2 nanosheets with improved electrochemical performances by modulating their conducting property and increasing the active sites on the interfaces between the two components.…”

Section: Introductionmentioning

confidence: 99%

“…As reported, WSe 2 exhibits lower activity because of its low conducting property and low number of active edge sites . The assembling layered morphology of WSe 2 in bulk or with thick stacking layers also greatly hinders its performance as dense layer loading tends to cover most of the active sites, lowering its efficiency for catalytic or energy storage processes . The performances of CoSe 2 and WSe 2 can be improved via the possible strategy of combination by heteronanostructure engineering to tune its electronic and structural properties for improving its functional performance with multipurpose applications.…”

Section: Introductionmentioning

confidence: 99%

“…37 The assembling layered morphology of WSe 2 in bulk or with thick stacking layers also greatly hinders its performance as dense layer loading tends to cover most of the active sites, lowering its efficiency for catalytic or energy storage processes. 38 The performances of CoSe 2 and WSe 2 can be improved via the possible strategy of combination by heteronanostructure engineering to tune its electronic and structural properties for improving its functional performance with multipurpose applications. The available reports indicate that heterostructuring of certain TMSes with other materials can tailor the electronic structures of the TMSes within the heterostructures and enhance the overall performance for an energy conversion/storage system, as illustrated in various active materials.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

CoSe₂ Nanoparticles Dispersed in WSe₂ Nanosheets for Efficient Electrocatalysis and Supercapacitance Applications

Muska

Yang²,

Sun³

et al. 2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

CoSe 2 nanoparticles dispersed in WSe 2 nanosheets forming heterostructured nanohybrids have been synthesized by a hot-injection colloidal synthesis process for refining their electronic functionalities intensively. Transmission electron microscopy (TEM) images reveal that the WSe 2 /CoSe 2 nanohybrids present as granular nanoparticles of CoSe 2 dispersed in WSe 2 nanosheets in a scattered way, thus constructing a heteronanostructured system. X-ray diffraction (XRD) patterns, X-ray photoelectron spectroscopy (XPS), and Raman spectroscopic studies besides the microscopic investigations confirmed the formation of the heterostructured nanohybrids along with the electronic interaction between CoSe 2 and WSe 2 in the heterostructured nanohybrids. The electrochemical investigations demonstrated that the WSe 2 /CoSe 2 heterostructured nanohybrids exhibit improved acidic HER and basic OER electrocatalytic behavior as well as supercapacitor performance than both of the isolated CoSe 2 and WSe 2 components. The heterostructured nanohybrids are characterized for electrocatalytic performance with a lower overpotential (η 10 ) and Tafel slope values of 157 mV and 79 mV dec −1 for HER and 330 mV and 76 mV dec −1 for OER, respectively. Meanwhile, the heterostructured nanohybrids illustrated very high capacitance (2720 F g −1 at 1 A g −1 and 1200 F g −1 for 20 A g −1 ) and an enhanced cyclic stability with 93.75% capacitance retention at 20 A g −1 , which is superior to that of both of isolated CoSe 2 and WSe 2 as well as most reported counterparts. The superior electrochemical performance is resulted from an improved electronic conductivity related to the nanoscale heterostructured hybrids through transfer of electrons between CoSe 2 and WSe 2 that could facilitate the chargetransfer reactions on the surface/interface in an electrochemical process as well as improved ion adsorption due to an increased surface area. Hybridization of CoSe 2 and WSe 2 to the nanoscale heterostructures with modulated electronic structures and increased active sites could promote the electrocatalysis and charge capacitance performances subsequently.

show abstract

Section: Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

CoSe₂ Nanoparticles Dispersed in WSe₂ Nanosheets for Efficient Electrocatalysis and Supercapacitance Applications

Muska

Yang²,

Sun³

et al. 2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

Wearable Sensors Based on Atomically Thin P‐Type Semiconductors

Jiang

Zhang

2023

Adv Materials Technologies

View full text Add to dashboard Cite

Abstract2D materials have exceptional physical and chemical characteristics, which makes them attractive for wearable technology. These characteristics include high carrier mobility, outstanding mechanical performance, abundant chemistry, and excellent electrostatic tunability. However, due to the high electron doping effect of interfacial charge impurities and intrinsic defects, most reported 2D materials are n‐type. Complementary electronic devices and high‐performance wearable sensors necessitate the development of p‐type 2D semiconductors, which have superior electrocatalytic performance in oxidative processes compared to their n‐type counterparts. This review paper thoroughly accounts for recent advancements in 2D p‐type semiconductor‐based wearable sensors, covering basic understandings, synthesis and fabrication, functional devices, and sensor performance insights. Finally, challenges and future opportunities for 2D p‐type semiconductor‐based wearable sensors are discussed.

show abstract

WSe₂ 2D p‐type semiconductor‐based electronic devices for information technology: Design, preparation, and applications

Cheng

Pang

et al. 2020

InfoMat

143

100

View full text Add to dashboard Cite

The pioneering exfoliation of monolayer tungsten diselenide has greatly inspired researchers toward semiconducting applications. WSe2 belongs to a family of transition‐metal dichalcogenides. Similar to graphene, WSe2 and analogous dichalcogenides have layered structures with weak van der Waals interactions between two adjacent layers. First, the readers are presented with the fundamentals of WSe2, such as types, morphologies, and properties. Here, we report the characterization principles and practices such as microscopy, spectroscopy, and diffraction. Second, the methods for obtaining high‐quality WSe2, such as exfoliation, hydrothermal and chemical vapor deposition, are briefly listed. With advantages of light weight, flexibility, and high quantum efficiency, 2D materials may have a niche in optoelectronics as building blocks in p‐n junctions. Therefore, we introduce a state‐of‐the‐art demonstration of heterostructure devices employing the p‐type WSe2 semiconductor. The device architectures include field‐effect transistors, photodetectors, gas sensors, and photovoltaic solar cells. Due to its unique electronic, optical, and energy band properties, WSe2 has been increasingly investigated due to the conductivity of the p‐type charge carrier upon palladium contact. Eventually, the dynamic research on WSe2 and van der Waals heterostructures is summarized to arouse the passion of the 2D research community.image

show abstract

Hydrothermal synthesis of WSe2 films and their application in high-performance photodetectors

Cited by 31 publications

References 33 publications

CoSe₂ Nanoparticles Dispersed in WSe₂ Nanosheets for Efficient Electrocatalysis and Supercapacitance Applications

CoSe₂ Nanoparticles Dispersed in WSe₂ Nanosheets for Efficient Electrocatalysis and Supercapacitance Applications

Wearable Sensors Based on Atomically Thin P‐Type Semiconductors

WSe₂ 2D p‐type semiconductor‐based electronic devices for information technology: Design, preparation, and applications

Contact Info

Product

Resources

About

Hydrothermal synthesis of WSe2 films and their application in high-performance photodetectors

Cited by 31 publications

References 33 publications

CoSe2 Nanoparticles Dispersed in WSe2 Nanosheets for Efficient Electrocatalysis and Supercapacitance Applications

CoSe2 Nanoparticles Dispersed in WSe2 Nanosheets for Efficient Electrocatalysis and Supercapacitance Applications

Wearable Sensors Based on Atomically Thin P‐Type Semiconductors

WSe2 2D p‐type semiconductor‐based electronic devices for information technology: Design, preparation, and applications

Contact Info

Product

Resources

About

CoSe₂ Nanoparticles Dispersed in WSe₂ Nanosheets for Efficient Electrocatalysis and Supercapacitance Applications

CoSe₂ Nanoparticles Dispersed in WSe₂ Nanosheets for Efficient Electrocatalysis and Supercapacitance Applications

WSe₂ 2D p‐type semiconductor‐based electronic devices for information technology: Design, preparation, and applications