Chemically synthesized Ag-doped SnS films for PV applications

Electrochemical Synthesis of Hybrid Layered Thermoelectric Materials Based on PEDOT/SnS Doped with Ag

“…[ 25,30 ] Finally, the high‐resolution XPS spectra of Ag 3d in the films show two signals at 368.21 eV and 374.22 eV which correspond to Ag 3d 5/2 and Ag 3d 3/2 , respectively, and the binding energy between them is 6.01 eV, indicating the presence of silver nanoparticles in the film. [ 26–28 ] Furthermore, the high‐resolution XPS spectrum at various silver concentrations (see Figure S6, Supporting Information), highlights how the 3d 5/2 Ag peak becomes wider and moves towards lower binding energies, confirming the formation of the Ag 8 SnS 6 phase, which presents a regular polygonal morphology as observed in the SEM images (Figure 3f). [ 22 ] In summary, the magnified XPS spectrum confirms the synthesis of silver‐doped tin sulfide on a PEDOT:ClO 4 layer, thereby obtaining a hybrid layered material by electrochemical co‐deposition.…”

“…The spectrum of the S 2p for the PEDOT films shows the characteristic peaks of thiol groups and thiophene rings of the polymeric chain [ 24 ] and the peaks of sulphone and sulfate due to the over oxidation of PEDOT. For the films with undoped PEDOT/SnS and Ag‐doped PEDOT/SnS, the spectra show a binding energy of 161.28 eV which corresponds to the energy of S 2– –Sn 2+ state confirming the presence of the SnS phase, [ 25,26 ] and the presence of silver is evidenced by a peak at 162.44 eV related to the energy of S 2– –Ag + which indicates that silver is bonded to sulfur atoms. [ 27 ] These peaks have an energy difference of 1.16 eV which is in agreement with the oxidation state of S 2– .…”

“…The SnS grain boundaries are thinner and consequently, the scattering of charge carriers is reduced leading to an increase in their mobility. [ 26 ] Also, the presence of SnS nano‐strands may improve carrier mobility and consequently the electrical conductivity. Figure 5a clearly shows the effect of the Ag doping on the Seebeck coefficient increasing values to 69 µV K –1 when the Ag‐dopant concentration in the solution is 0.15%.…”

Investigation of spray pyrolyzed cubic structured Cu doped SnS films

“…Externally doping of thin lm semiconductors most frequently referred way to tailor or improve its physical properties for photovoltaic applications. Recently, some studies have shown that doping of SnS with aluminum (Al), iron (Fe), indium (In), copper (Cu) and silver (Ag) can enhance its photovoltaic properties [8][9][10][11][12]. Doped and undoped SnS lms can be deposited by several techniques such as RF magnetron sputtering [8], vapor transport deposition (VTD) [13], e-beam evaporation [14], thermal evaporation [15], electrodeposition [10], chemical bath depositions [7], spray pyrolysis [12].…”

Preparation of solution processed photodetectors comprised of two-dimensional tin(ii) sulfide nanosheet thin films assembled via the Langmuir–Blodgett method

“…Previously it has been shown that silver diffusion into SnS has an interstitial doping effect, neutralising defect states and lowering the lm resistivity. 55,56 It is also possible that the Ag ink morphology and the concentration of nanoparticles in the ink may play an effect on the device properties. 57 A resistivity of 2.85 Â 10 6 U sq À1 was obtained for the device which is signicantly higher than SnS lms prepared by physical vapour deposition (250 U sq À1 ), 58 likely due to poor carrier mobility between akes.…”