TY - JOUR
T1 - Synthesis and characterization of sulfate precursor based SnS thin films using SILAR technique at elevated solution temperature
AU - Kumar, Pawan
AU - Rao, Gowrish K.
N1 - Funding Information:
The authors are thankful to Manipal Institute of Technology (MAHE, Manipal) for providing financial assistance and central instrumentation facility, MIT, MAHE, Manipal for providing characterization facilities. The authors would like to thank PSG institute of advanced studies for XRD measurement, CRF, NITK for Raman analysis, Dr. Sudha D. Kamath, Dept. of physics, MIT, Manipal for photoluminescence measurement.
Funding Information:
The research work was supported by Internal Institute Fund . No sanction number is required.
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/6
Y1 - 2023/6
N2 - In this study, a microprocessor-controlled SILAR technique was used to prepare SnS thin films on glass substrates using equimolar SnSO4 and Na2S precursors. The combination of sulfate precursor and increase in the solution temperature lead to the dilution of phase purity. The effects of these heterogeneous phase blend on the structural, optical, electrical and photo-response properties of the films were studied in detail. The coexistence of the SnS and SnO2 phases was confirmed by XRD and Raman analysis. The energy band structure of the films was significantly affected by the presence of SnO2. The optical band gap of the films shifted from the mid-visible to the UV region of the electromagnetic spectrum as the amount of mixed phases in the films increased. The photoluminescence spectra also showed prominent emission in the blue and green regions arising from the phase coexistence. Marginal increase in the electrical conductivity was observed for higher solution temperature. The rise-time of the photocurrent was found to increase significantly (nearly 80 %) owing to the presence of heterogenous phase blend. This prolonged decay time suggests the possibility of persistent photoconductivity (PPC) in the films. Data availability statement: The data cannot be made available at this point as the results presented here are part of ongoing research work.
AB - In this study, a microprocessor-controlled SILAR technique was used to prepare SnS thin films on glass substrates using equimolar SnSO4 and Na2S precursors. The combination of sulfate precursor and increase in the solution temperature lead to the dilution of phase purity. The effects of these heterogeneous phase blend on the structural, optical, electrical and photo-response properties of the films were studied in detail. The coexistence of the SnS and SnO2 phases was confirmed by XRD and Raman analysis. The energy band structure of the films was significantly affected by the presence of SnO2. The optical band gap of the films shifted from the mid-visible to the UV region of the electromagnetic spectrum as the amount of mixed phases in the films increased. The photoluminescence spectra also showed prominent emission in the blue and green regions arising from the phase coexistence. Marginal increase in the electrical conductivity was observed for higher solution temperature. The rise-time of the photocurrent was found to increase significantly (nearly 80 %) owing to the presence of heterogenous phase blend. This prolonged decay time suggests the possibility of persistent photoconductivity (PPC) in the films. Data availability statement: The data cannot be made available at this point as the results presented here are part of ongoing research work.
UR - https://www.scopus.com/pages/publications/85159765193
UR - https://www.scopus.com/inward/citedby.url?scp=85159765193&partnerID=8YFLogxK
U2 - 10.1016/j.mtcomm.2023.106194
DO - 10.1016/j.mtcomm.2023.106194
M3 - Article
AN - SCOPUS:85159765193
SN - 2352-4928
VL - 35
JO - Materials Today Communications
JF - Materials Today Communications
M1 - 106194
ER -