Preparation and characterization of Bi2Se3 nanowires by electrodeposition

Peng, Hongjian; Zhou, Jiaolian; Tang, Ding; Lai, Yanqing; Liu, Fangyang; Li, Jie; Liu, Yexiang

doi:10.1016/j.electacta.2011.03.080

Cited by 11 publications

(4 citation statements)

References 23 publications

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“…Films of Bi 2 Se 3 have previously been electrodeposited in both the rhombohedral and orthorhombic phases. − ,,− Electrodeposition on polycrystalline metal and metal oxide substrates (e.g., Au, Ru, Ti, Pt, stainless steel, or tin oxide) has produced films with the rhombohedral phase, a mixture of the two phases, or the orthorhombic phase with low crystallinity (i.e., films exhibiting small crystallite sizes and weak diffraction peaks). ,,− Growth of phase-pure orthorhombic Bi 2 Se 3 with high crystallinity has been reported only when electrodeposited on single-crystal, n -type Si (100) substrates with relatively high resistivities of 4 to 30 Ω cm. − , Thus, formation of the metastable, orthorhombic phase was proposed to result from direct epitaxy between the Si (100) substrate and the growing film. A unified mechanism for controlling the phase selectivity in this material system has not yet been developed.…”

Section: Introductionmentioning

confidence: 89%

Spontaneous Seed Formation during Electrodeposition Drives Epitaxial Growth of Metastable Bismuth Selenide Microcrystals

et al. 2022

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Materials with metastable phases can exhibit vastly different properties from their thermodynamically favored counterparts. Methods to synthesize metastable phases without the need for high-temperature or high-pressure conditions would facilitate their widespread use. We report on the electrochemical growth of microcrystals of bismuth selenide, Bi2Se3, in the metastable orthorhombic phase at room temperature in aqueous solution. Rather than direct epitaxy with the growth substrate, the spontaneous formation of a seed layer containing nanocrystals of cubic BiSe enforces the metastable phase. We first used single-crystal silicon substrates with a range of resistivities and different orientations to identify the conditions needed to produce the metastable phase. When the applied potential during electrochemical growth is positive of the reduction potential of Bi3+, an initial, Bi-rich seed layer forms. Electron microscopy imaging and diffraction reveal that the seed layer consists of nanocrystals of cubic BiSe embedded within an amorphous matrix of Bi and Se. Using density functional theory calculations, we show that epitaxial matching between cubic BiSe and orthorhombic Bi2Se3 can help stabilize the metastable orthorhombic phase over the thermodynamically stable rhombohedral phase. The spontaneous formation of the seed layer enables us to grow orthorhombic Bi2Se3 on a variety of substrates including single-crystal silicon with different orientations, polycrystalline fluorine-doped tin oxide, and polycrystalline gold. The ability to stabilize the metastable phase through room-temperature electrodeposition in aqueous solution without requiring a single-crystal substrate broadens the range of applications for this semiconductor in optoelectronic and electrochemical devices.

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Section: Introductionmentioning

confidence: 89%

Spontaneous Seed Formation during Electrodeposition Drives Epitaxial Growth of Metastable Bismuth Selenide Microcrystals

et al. 2022

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“…1a, two distinct waves with the cathodic peak at about −0.23 V and the anodic peak at about 0.06 V can be observed, which correspond to the reductive deposition of Bi 3+ in the solution (eqn (1)) and the oxidative dissolution of the deposited Bi, respectively. 32 In addition, there is another cathodic peak at about −0.65 V in the curve, which can be attributed to the hydrogen evolution in the electrolyte solution (eqn (2)). 39 Bi 3+ + 3e = Bi (1)…”

Section: Cyclic Voltammograms Of the Unitary Bi And Se Systems And Th...mentioning

confidence: 98%

“…As for the anodic wave, the continuous negative anodic current shows that the applied potentials were not positive enough for the oxidation of the deposits, and the peaks at about 0.02 V and 0.35 V may correspond to the unconspicuous oxidation of Bi and Bi 2 Se 3 , respectively. 32,42 2Bi 3+ + 3Se + 6e − = Bi 2 Se 3 (6) 2Bi 3+ + 3H 2 Se = Bi 2 Se 3 + 6H + (7)…”

Section: Cyclic Voltammograms Of the Unitary Bi And Se Systems And Th...mentioning

confidence: 99%

“…28 In recent years, bismuth selenide compounds have been prepared into thin films or nanostructures, such as nanorods, nanospheres, nanowires, nanosheets, nanotubes, etc. [29][30][31][32][33] Among various fabrication methods, the electrochemical approach has been considered to be a promising way from the viewpoint of simplicity, low cost and feasibility for largearea production. 34 Li et al reported the preparation of Bi 2 Se 3 thin films through electrodeposition using Bi(NO 3 ) 3 •5H 2 O and SeO 2 as starting materials.…”

Section: Introductionmentioning

confidence: 99%

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The electrochemical self-assembly of hierarchical dendritic Bi2Se3 nanostructures

et al. 2014

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Bismuth selenide (Bi 2 Se 3 ) has proven to be an important material in thermoelectric and topological insulator applications. We report here a simple electrochemical self-assembly route for the preparation of well-defined hierarchical dendritic Bi 2 Se 3 nanostructures. Cyclic voltammetry was used to study the electrochemical reactions relevant to the growth of the prepared bismuth selenide. The compositional, morphological and structural properties of the deposited nanostructures were characterized using energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy and X-Ray Photoelectron Spectroscopy (XPS). The band gap of the prepared Bi 2 Se 3 dendritic nanostructures was estimated to be 0.50 ± 0.01 eV by a UV-VIS-NIR spectrophotometer and the dendritic Bi 2 Se 3 nanostructures showed an excellent photoelectrochemical activity. Additionally, based on the investigation on the evolution of the morphology and composition during electrochemical growth, a possible formation mechanism of the dendritic structures was concluded. Furthermore, the effects of some synthesis conditions on the morphologies of the deposited bismuth selenide nanostructures were studied.

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Enhanced UV Photoresponse Performances of TiO₂/Bi₂Se₃ Heterostructure‐Based Photoelectrochemical Photodetector

Yang,

Ye,

et al. 2024

Physica Status Solidi (a)

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Bi2Se3 has a unique surface state and excellent electron transport performance, but because of its narrow band gap, Bi2Se3‐based photodetectors are difficult to achieve high response to ultraviolet (UV) light. In this paper, the TiO2/Bi2Se3 heterostructure was constructed by spin‐coating TiO2 on Bi2Se3 film, and TiO2/Bi2Se3 heterostructure‐based photoelectrochemical (PEC) photodetector was constructed, and a series of measurements were carried out. The measure results showed that the photoresponse performance of TiO2/Bi2Se3 heterostructure‐based photodetector was improved in the visible region, and the performance in the UV was further improved. This is because the type ii band alignment between TiO2 and Bi2Se3 is beneficial for the effective separation and transfer of photogenerated electron‐hole pairs, reducing recombination losses and enhancing the overall photoresponse. In addition, under the action of the built‐in electric field formed by the heterostructure, the photogenerated electrons and holes are easier to separate, which reduces the recombination probability of the photogenerated electron‐hole pair and improves the photoelectric conversion efficiency. In the UV, TiO2/Bi2Se3 heterostructure can make more efficient use of the light absorption characteristics of TiO2 and absorb more photons, resulting in a larger photocurrent. These results indicate that TiO2/Bi2Se3 heterostructure‐based photodetector has great application potential in the UV.

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Preparation and characterization of Bi2Se3 nanowires by electrodeposition

Cited by 11 publications

References 23 publications

Spontaneous Seed Formation during Electrodeposition Drives Epitaxial Growth of Metastable Bismuth Selenide Microcrystals

Spontaneous Seed Formation during Electrodeposition Drives Epitaxial Growth of Metastable Bismuth Selenide Microcrystals

The electrochemical self-assembly of hierarchical dendritic Bi2Se3 nanostructures

Enhanced UV Photoresponse Performances of TiO₂/Bi₂Se₃ Heterostructure‐Based Photoelectrochemical Photodetector

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Preparation and characterization of Bi2Se3 nanowires by electrodeposition

Cited by 11 publications

References 23 publications

Spontaneous Seed Formation during Electrodeposition Drives Epitaxial Growth of Metastable Bismuth Selenide Microcrystals

Spontaneous Seed Formation during Electrodeposition Drives Epitaxial Growth of Metastable Bismuth Selenide Microcrystals

The electrochemical self-assembly of hierarchical dendritic Bi2Se3 nanostructures

Enhanced UV Photoresponse Performances of TiO2/Bi2Se3 Heterostructure‐Based Photoelectrochemical Photodetector

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Enhanced UV Photoresponse Performances of TiO₂/Bi₂Se₃ Heterostructure‐Based Photoelectrochemical Photodetector