The cost-effective deposition of ultra-thin titanium(IV) oxide passivating layers for improving photoelectrochemical activity of SnS electrodes

Kois, J.; Polivtseva, Svetlana; Bereznev, Sergei

doi:10.1016/j.tsf.2018.12.047

Cited by 7 publications

(9 citation statements)

References 30 publications

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“…Figure 4 a shows the PEC behavior across the potential range from 0.3 V to −0.8 V vs. SCE in the negative directions. Pristine and treated films exhibited the forward current at positive potentials and very low reverse current at negative potentials, corresponding to a Schottky barrier between p-type semiconductor and electrolyte [ 6 , 10 ]. The open-circuit voltage ( V OC ) of the pristine film was found to be −0.13 V vs. SCE (0.49 V vs. RHE, Supplementary Equations (S1) and (S2) ), while the V OC values of treated Sb 2 Se 3 films shifted toward more positive potentials of about −0.05 V vs. SCE (0.57 V vs. RHE, Supplementary Equation (S3) ).…”

Section: Resultsmentioning

confidence: 99%

“…The on-set potential of photocurrent shifted towards a positive direction after increasing the concentration of SbCl 3 from 50 to 150 mM, and then shifted back towards a negative direction when 300 mM SbCl 3 treatment was employed. This behavior can be associated with a less-defective surface formed upon the 150 mM activation [ 6 , 10 ]. The 50 mM Cl-GT electrode revealed the PCD values of around 21 mA cm −2 at −248 mV vs. SCE, while PCD of the 150 mM-activated sample approximated to ~31 mA cm −2 at −248 mV vs. SCE, the highest value yet observed for Sb 2 Se 3 photoelectrodes [ 12 , 22 ].…”

Section: Resultsmentioning

confidence: 99%

“…For the preparation of Mo/treated-Sb 2 Se 3 /TiO 2 /IrO x structures, Mo/Sb 2 Se 3 layers were treated at 300 °C in 50 mM, 150 mM and 300 mM SbCl 3 -glycerol solutions for 90 min. Ultra-thin layers of TiO 2 were deposited using a previously reported procedure [ 6 ], the 3Å-thick layers of IrO x were fabricated using magnetron sputtering deposition. The PEC performances of Mo/treated-Sb 2 Se 3 /TiO 2 /IrO x electrodes were examined using 1 M H 2 SO 4 solutions as a background electrolyte at pH below 1.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, cheap and eco-friendly wide-bandgap metal oxides such as TiO 2 , BiVO 4 , or Fe 2 O 3 are considered inappropriate for the bottom electrode, requiring a narrow bandgap semiconductor. Over the last decades, different cost-effective metal chalcogenides such as Nanomaterials 2021, 11,52 2 of 14 tin sulfide (SnS, E g~1 .3 eV) [6,14] and copper-zinc-tin-sulfide (CZTS, E g~1 .5 eV) [10,15] or metal oxide materials, e.g., CuFeO 2 (E g~1 .5 eV) [16] have been tried with limited success. Although the optoelectronic properties of CZTS give the impression of being suitable for the bottom photoelectrode, the low photocorrosion stability restrains its applicability in commercial PEC water splitting devices [10].…”

Section: Introductionmentioning

confidence: 99%

“…Inorganic TFSCs have recently demonstrated remarkable power conversion efficiencies (PCE): 23.35% for the copper-indium-gallium-selenide (CIGS) technology in 2019 [ 2 ], or 22% for cadmium telluride (CdTe) in 2017 [ 3 ]; and the PEC cells exploiting III–V photovoltaic materials reached a solar-to-hydrogen (STH) efficiency of 19.3% in 2018 [ 4 ]. Since the availability and toxicity of the constituent elements in these technologies limit the production potential, the investigation of inexpensive and nontoxic absorbers with relevant optoelectronic properties becomes paramount [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

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A Novel Thermochemical Metal Halide Treatment for High-Performance Sb2Se3 Photocathodes

et al. 2020

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The fabrication of cost-effective photostable materials with optoelectronic properties suitable for commercial photoelectrochemical (PEC) water splitting represents a complex task. Herein, we present a simple route to produce Sb2Se3 that meets most of the requirements for high-performance photocathodes. Annealing of Sb2Se3 layers in a selenium-containing atmosphere persists as a necessary step for improving device parameters; however, it could complicate industrial processability. To develop a safe and scalable alternative to the selenium physical post-processing, we propose a novel SbCl3/glycerol-based thermochemical treatment for controlling anisotropy, a severe problem for Sb2Se3. Our procedure makes it possible to selectively etch antimony-rich oxyselenide presented in Sb2Se3, to obtain high-quality compact thin films with a favorable morphology, stoichiometric composition, and crystallographic orientation. The treated Sb2Se3 photoelectrode demonstrates a record photocurrent density of about 31 mA cm−2 at −248 mV against the calomel electrode and can thus offer a breakthrough option for industrial solar fuel fabrication.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Novel Thermochemical Metal Halide Treatment for High-Performance Sb2Se3 Photocathodes

et al. 2020

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Nanoengineering of Tin Monosulfide (SnS)‐Based Structures for Emerging Applications

Zhu

et al. 2021

Small Science

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Tin-based binary chalcogenide Sn-X (X ¼ S, Se, Te) compounds have attracted extensive interest in the optical, optoelectronic, catalysis, and flexible systems due to their intriguing performances. [1][2][3][4][5][6][7] The Sn-X (X ¼ S, Se, Te) compounds are typically layered materials and usually have three crystalline phases: hexagonal, monoclinic, and orthorhombic; orthorhombic phase is denoted by chemical formula SnX, and hexagonal and monoclinic phases are labeled as SnX 2 . [8] Until now, SnSe and SnTe compounds have already achieved great progress in many fields, especially for thermoelectronics and ferroelectrics, [9][10][11][12] and many important reviews have been reported on SnSe and SnTe compounds due to their rapid development. [8,[13][14][15][16] For example, in 2020, Chen et al. [14] summarized a comprehensive overview of controlled synthesis, characterization, and thermoelectric performance in SnSe. In 2018, Shi et al. [8] summarized the growth, characterization, and applications (photovoltaics, supercapacitors, rechargeable batteries, phase-change memory devices, and topological insulator) of SnSe. In 2018, Li et al. [15] reviewed the development of SnS, SnSe, and SnTe, mainly focusing on the controllable tuning of the electron and phonon transport as well as the challenges for further optimization and practical applications. Among Sn-X (X ¼ S, Se, Te) compounds, tin monosulfide (SnS) as a typical black phosphorus analogue, has also received intensive scientific attention due to its unique properties, such as inexpensive, sustainable, suitable bandgap between Si (1.12 eV) and GaAs (1.43 eV), [17] high absorption coefficient (10 À4 cm À1 ), [18] strong mechanical properties, and anisotropic optoelectronic, [19][20][21] which are of great value in optoelectronics, catalysis, sensors, and nanomedicines. [7,[22][23][24][25][26][27] In addition, layered SnS with suitable spacing structures hold promising potentials in the field of lithium (Li)-ion batteries and sodium (Na)-ion batteries due to their relatively high electrical conductivity and theoretical capacity. [28][29][30][31][32] However, although popular SnS has achieved great progress in a variety of fields, few comprehensive reviews have hitherto focused on the field of SnS-based nanostructures and their fascinating applications.Inspired by important reviews on SnSe reported by Chen [14] and Li [8] in recent years, we comprehensively summarized the synthesis, characterization, and the latest progress of SnS-based nanostructures, as shown in Figure 1. First, the most commonly employed techniques (hydrothermal, vapor deposition, electrostatic assembly, etc.) for preparing SnS and SnS-based nanostructures are presented in detail with their recent progress. Furthermore, the fundamental properties (crystal structure, electronic band structure, optical property, and Raman spectroscopy) and diverse applications (batteries, solar cells, catalysis, optoelectronics, sensors, ferroelectrics, thermoelectrics, nonlinear properties, and biomedical applicatio...

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Developments in visible-light active TiO2/SnX (X = S and Se) and their environmental photocatalytic applications – A mini-review

Sharma

Mittal

Chauhan

et al. 2021

Inorganic Chemistry Communications

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The cost-effective deposition of ultra-thin titanium(IV) oxide passivating layers for improving photoelectrochemical activity of SnS electrodes

Cited by 7 publications

References 30 publications

A Novel Thermochemical Metal Halide Treatment for High-Performance Sb2Se3 Photocathodes

A Novel Thermochemical Metal Halide Treatment for High-Performance Sb2Se3 Photocathodes

Nanoengineering of Tin Monosulfide (SnS)‐Based Structures for Emerging Applications

Developments in visible-light active TiO2/SnX (X = S and Se) and their environmental photocatalytic applications – A mini-review

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