Electrochemical and photoelectrochemical characterization of SnS photoabsorber films

Efficiently Synergistic Hydrogen Evolution Realized by Trace Amount of Pt-Decorated Defect-Rich SnS2 Nanosheets

“…For as-grown sample, the Raman peaks at 313.8 cm –1 and a weak peak at 204.9 cm –1 are, respectively, assigned to the characteristic A 1g and E g modes of SnS 2 . , After cathodic scans, in addition to the 313.8 cm –1 peak of SnS 2 , four new peaks at 92.9, 161.4, 183.2, and 223.6 cm –1 can be observed, which are associated with the Raman characteristic modes of SnS (peaks at 92.9, 183.2, and 223.6 cm –1 are assigned to the A g mode, and peak at 161.4 cm –1 is assigned to the B 3g mode). ,, As for anodic scans, oxidative signal appears at ca. −0.15 V versus RHE, which is related to the anodic dissolution of SnS 2 and reduced SnS, consistent with early reports. ,, Hence, from Figure b we can observe great decrease in the Raman peak intensity of SnS 2 and absence of the Raman peaks of SnS. The anodic dissolution is further confirmed by the ICP results (Table S1), which verified the existence of dissolved Sn element in electrolyte after CV process.…”

“…The reason for this behavior can be attributed to the surface passivation by layer of tin oxides on the surface of SnS 2 /SnS, which decreases the rate of redox reactions on the electrode surface. 37 On the one hand, as increasing the scan segment, we believe the redox reactions occurred on SnS 2 nanosheets during our CV process can finally lead to change of their morphology and crystalline properties. On the other hand, as reported that anodic dissolution of platinum from the Pt counter electrode could also occur under acidic and low-potential conditions, 38 especially under the continuous CV scan (as seen Table S1).…”

“…−0.15 V versus RHE, which is related to the anodic dissolution of SnS 2 and reduced SnS, consistent with early reports. 22,32,37 Hence, from Figure 1b we can observe great decrease in the Raman peak intensity of SnS 2 and absence of the Raman peaks of SnS. The anodic dissolution is further confirmed by the ICP results (Table S1), which verified the existence of dissolved Sn element in electrolyte after CV process.…”

Atmospheric Air Plasma Treated SnS Films: An Efficient Electrocatalyst for HER

“…Recently, two-dimensional layered metal sulfides (MS) (i.e. MoS 2 [3,4], WS 2 [5], ZrS 3 [6], SnS [7,8], and SnS 2 [9,10]) were shown to have a unique graphene-like nanostructure. This excellent carrier mobility, due to the unique directionality in 2-D materials, and the narrow bandgap renders them as promising electrocatalysts for HER.…”

Effect of the precursors and synthesis methods on the optical and photoelectrochemical characteristics of SnS absorber layer

“…In this regard, Tin (II) sulphide (SnS) is SnS has direct 1.2-1.5 eV [5,6] and indirect optical band gap of 1-1.2 eV [7,8]. It has a high absorption coefficient, conductivity, α more than 10 4 cm -1 [9], a high carrier concentration and mobility (hole mobility ~ 90 cm 2 V −1 s −1 ) that have made it a promising candidate for photovoltaic [2,10,11], photoelectrochemical cell [12,13], Li ion battery anodes [14], electrochemical capacitors [15] and photodetectors [16].…”