Effect of substrate on the nanostructured Bi2Se3 thin films for solar cell applications

The effect of deposition temperature on the structural, optical and electrical properties of copper bismuth sulphide (CuBiS 2 ) thin films deposited by chemical bath deposition onto glass substrates at different deposition temperatures (40°C, 50°C, 60°C and 70°C) for 5 hours deposition time period was investigated. The obtained films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX) and optical absorption spectra. All deposited films were polycrystalline and had an orthorhombic structure. Their grain size had changed with deposition temperature and their compositions were nearly stoichiometric. The optical band gap value was decreased from 2.44 eV to 2.33 eV with increasing the film thickness. Electrical parameters such as mobility and type of electrical conduction were determined from the Hall effect measurements. They showed that the obtained films have n-type conductivity and mobility values of the copper bismuth sulphide (CuBiS 2 ) films have changed with deposition temperature.

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“…It is observed that the composition is homogeneous and stoichiometric [20]. This confirms the formation of almost pure CuBiS 2 .…”

Section: Energy Dispersive X-ray (Edax) Analysissupporting

confidence: 70%

Effect of deposition temperature on structural, optical and electrical properties of copper bismuth sulphide (CuBiS₂) thin films deposited by chemical bath deposition

Balasubramanian¹,

Kumar²,

Sengottaiyan³

2017

Materials Science-Poland

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“…It has a high absorption coefficient in the visible and near-infrared light regions with a narrow bandgap (0.35 eV) [ 37 ]. As an important n-type chalcogenide, Bi 2 Se 3 possesses many important characteristics, such as a high electrical conductivity [ 38 ], appreciable thermoelectric property [ 39 ], photosensitivity [ 40 ], electrochemical property [ 41 ] and photoconductivity [ 42 ]. Furthermore, Bi 2 Se 3 is a popular topological insulator [ 43 – 45 ] and has the unique property of conductive surface states and insulated bulk states.…”

Section: Introductionmentioning

confidence: 99%

Bi2Se3 Sensitized TiO2 Nanotube Films for Photogenerated Cathodic Protection of 304 Stainless Steel Under Visible Light

Wang

et al. 2018

Nanoscale Res Lett

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Titanium dioxide (TiO2) nanotube arrays coupled with a narrow gap semiconductor—bismuth selenide (Bi2Se3)—exhibited remarkable enhancement in the photocathodic protection property for 304 stainless steel under visible light. Bi2Se3/TiO2 nanocomposites were successfully synthesized using a simple two-step method, including an electrochemical anodization method for preparing pure TiO2 and a chemical bath deposition method for synthesizing Bi2Se3 nanoflowers. The morphology and structure of the composite films were studied by scanning electron microscopy, energy dispersion spectroscopy, X-ray photoelectron spectroscopy and X-ray diffraction. In addition, the influence of the Bi2Se3 content on the photoelectrochemical and photocathodic protection properties of the composite films was also studied. The photocurrent density of the Bi2Se3/TiO2 nanocomposites was significantly higher than that of pure TiO2 under visible light. The sensitizer Bi2Se3 enhanced the efficient separation of the photogenerated electron-hole pairs and the photocathodic protection properties of TiO2. Under visible light illumination, Bi2Se3/TiO2 nanocomposites synthesized by the chemical bath deposition method with Bi3+ (0.5 mmol/L) exhibited the optimal photogenerated cathodic protection performance for 304 stainless steel.

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“…The effective band optical gap of Bi 2 Se 3 /glass, Bi 2 Se 3 /ITO, and Bi 2 Se 3 /FTO is increases with the increase of grain size and thickness. The result is closed to Yu et al [36] and Desai et al [27]. These band gap values of the Bi 2 Se 3 films can be achieved to solar energy and optoelectronics application prospects [37].…”

Section: Resultsmentioning

confidence: 63%

“…The results of XRD indicated that the Bi 2 Se 3 crystals films have been grown on the glass, ITO and FTO at 300°C. The highest intensity diffraction peak at 2θ=29.72 (0 1 5) shown in figure 2, the grain size on the surface of the films for are 193 Å, 198 Å, and 221 Å by using the Debye-Scherrer (DS) [17,27].…”

Section: Resultsmentioning

confidence: 99%

“…The grain size of thin films on glass substrate is smaller than that on FTO and ITO substrates, which may be due to the fact that FTO and ITO are conductive substrates. And they offer more multicore centers than nonconductive glass substrates, so they are more likely to form large particles [27]. From the cross-sectional images, it can be seen that the thickness of the Bi 2 Se 3 films on the three substrates is 389 nm (FTO), 385 nm (ITO), and 364 nm (glass), respectively.…”

Section: Resultsmentioning

confidence: 99%

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Photoelectric properties of Bi₂Se₃ films grown by thermal evaporation method

Xiao¹,

Liu²,

Zhang³

et al. 2020

Mater. Res. Express

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The Bi 2 Se 3 films were prepared by thermal evaporation on different substrates (FTO, ITO and Glass). The structure and morphology are characterized by XRD and SEM. The optical band gap (E g ) is 1.47 eV, 1.54 eV, and 1.59 eV, respectively. The I-V and C-V curves have been obtained by a photoelectrochemical (PEC) cell system, and the results indicated the Bi 2 Se 3 film is n-type semiconductor. The transient photocurrent response of Bi 2 Se 3 /FTO and Bi 2 Se 3 /ITO were measured to evaluate the application potential of Bi 2 Se 3 films in solar cell. The above results indicated that the Bi 2 Se 3 films have advantages in the application of solar cells.

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Effect of substrate on the nanostructured Bi2Se3 thin films for solar cell applications

Cited by 37 publications

References 33 publications

Effect of deposition temperature on structural, optical and electrical properties of copper bismuth sulphide (CuBiS₂) thin films deposited by chemical bath deposition

Effect of deposition temperature on structural, optical and electrical properties of copper bismuth sulphide (CuBiS₂) thin films deposited by chemical bath deposition

Bi2Se3 Sensitized TiO2 Nanotube Films for Photogenerated Cathodic Protection of 304 Stainless Steel Under Visible Light

Photoelectric properties of Bi₂Se₃ films grown by thermal evaporation method

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Effect of substrate on the nanostructured Bi2Se3 thin films for solar cell applications

Cited by 37 publications

References 33 publications

Effect of deposition temperature on structural, optical and electrical properties of copper bismuth sulphide (CuBiS2) thin films deposited by chemical bath deposition

Effect of deposition temperature on structural, optical and electrical properties of copper bismuth sulphide (CuBiS2) thin films deposited by chemical bath deposition

Bi2Se3 Sensitized TiO2 Nanotube Films for Photogenerated Cathodic Protection of 304 Stainless Steel Under Visible Light

Photoelectric properties of Bi2Se3 films grown by thermal evaporation method

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Effect of deposition temperature on structural, optical and electrical properties of copper bismuth sulphide (CuBiS₂) thin films deposited by chemical bath deposition

Effect of deposition temperature on structural, optical and electrical properties of copper bismuth sulphide (CuBiS₂) thin films deposited by chemical bath deposition

Photoelectric properties of Bi₂Se₃ films grown by thermal evaporation method