Gas–solid reaction for in situ deposition of Cu₃SbS₄ on a mesoporous TiO₂ film

Abstract

A novel, facile, in situ gas–solid reaction method has been successfully employed for the deposition of famatinite (Cu3SbS4) semiconductor on a mesosporous TiO2 film. The Cu3SbS4 film shows good photoresponse performance with a high potential as a photovoltaic absorber.

Synthesis of CuSbS2 Nanoplates and CuSbS2–Cu3SbS4 Nanocomposite: Effect of Sulfur Source on Different Phase Formation

“…However, the sample with TA-OLA as sulfur precursor gives two Raman vibrational bands, one at 319 cm –1 and another at 336 cm –1 corresponding to Cu 3 SbS 4 and CuSbS 2 phases, respectively (Figure ). It may be noted that Cu 3 SbS 4 phase gives five Raman active peaks at 246, 273, 319, 345, and 637 cm –1 , in which the 318 and 632 cm –1 peaks are assigned to the fundamental and overtone modes, respectively. − However, we have observed only the fundamental peak at 319 cm –1 as a characteristic peak corresponding to Cu 3 SbS 4 , which is also reported earlier as a characteristic peak for the Cu 3 SbS 4 phase . The Raman data support the PXRD analysis on the phases of pure CuSbS 2 and CuSbS 2 –Cu 3 SbS 4 nanocomposite obtained while using S-OLA and TA-OLA as sulfur sources, respectively.…”

Synthetic Strategies, Thermal Stability, and Optical Properties for Nanostructured Famatinite with Cu-Site Doping

“…Band gaps of each famatinite species ranged from 0.85 to 0.95 eV, with each dashed line plotting the linear region of each dopant back to the x -intercept (Figure b). These values are in line with the reported literature based on computational and experimental findings. ,− The band gap of Cu 3 SbS 4 (1) was approximately 0.91 eV, while the band gap of Cu 3 SbS 4 (2) was around 0.87 eV. Cu 2.70 Fe 0.30 SbS 4 , Cu 2.70 Zn 0.30 SbS 4 , and Cu 2.70 Mn 0.30 SbS 4 all have band gaps higher than either undoped famatinite.…”

“…In the literature, a variety of synthetic strategies have produced famatinite, but the nature of the band gap has varied between direct and indirect (Table S6). ,,− ,− ,− ,,,,,,,− For solution-phase methods that produce materials with indirect band gaps, annealing has been identified as a remedy to shift the dominant mode of charge excitation to be direct . All famatinite nanoparticles produced herein by this solution-phase, surfactant-free modified polyol method possessed a direct band gap without the need for an annealing step.…”

“…Famatinite has been classified as a superabsorber, featuring an optical absorption coefficient greater than 10 4 cm –1 over the visible region. , The direct optical band gap of famatinite has been computationally determined to be 0.98 eV, while experimental results have shown indirect and direct band gaps ranging from 0.46 to 1.2 eV. ,− This range of values is likely due to differences in synthetic methods as well as the presence of structural defects or secondary phases . Coupling the strong solar absorption coefficient and direct band gap with a high carrier mobility of 0.05–2 cm 2 V –1 s –1 , famatinite has the potential to significantly impact solar cell technologies both as a hole transporter and as a light absorber.…”

Lithium Argyrodite Sulfide Electrolytes with High Ionic Conductivity and Air Stability for All-Solid-State Li-Ion Batteries

“…The XPS spectrum of Li 6 SbS 5 I for Sb 3d in Figure e consists of two distinct deconvolution peaks corresponding to Sb–S bonding at 538.6 (green) and 529.4 eV (red). The minor peak at 531.3 eV (purple) was attributed to antimony in a Sb–O environment resulting from the hydrolysis reaction at the surface. − As the Ge ratio in Li 6+ x Sb 1– x Ge x S 5 I increased, those peaks gradually decreased at the same binding energy. Meanwhile, a new peak related to the Ge–S bonding in Li 6+ x Sb 1– x Ge x S 5 I ( x = 0.5 and 0.75) at 1218.9 eV was observed in Figure S6. , The XPS spectrum of Li 6+ x Sb 1– x Ge x S 5 I ( x = 0.5 and 0.75) for Ge 3d in Figure f shows a new peak at 30.9 eV associated with the GeS 4 4– bonding, , which confirms the Ge substitution at the SbS 4 site.…”