Copper tin sulfide （Cu2SnS3） was a potential earth abundant absorber material for photovoltaic device application. In this contribution, triclinic Cu2SnS3 film with phase pure composition and large grain size was fa...Copper tin sulfide （Cu2SnS3） was a potential earth abundant absorber material for photovoltaic device application. In this contribution, triclinic Cu2SnS3 film with phase pure composition and large grain size was fabricated from a hydrazine solution process using Cu, Sn and S as the precursors. Absorption measurement revealed this Cu2SnS3 film had a direct optical band gap of 0.88 eV, and Hall effect measurement indicated the film was p-type with hole mobility of 0.86 cmE/Vs. Finally Mo/Cu2SnS3/ CdS/ZnO/AZO/Au was produced and the best device efficiency achieved was 0.78%. Also, this device showed improved device performance during ambient storage. This study laid some foundation for the further improve- ment of Cu2SnS3 solar cell.展开更多
CZTS(Cu_(2)ZnSnS_(4)),a P-type semiconductor with a direct bandgap(1.2-1.7eV),earth-abundant,non-toxic,and has a large absorption coefficient makes it extremely useful in optoelectronics and light-harvesting applicati...CZTS(Cu_(2)ZnSnS_(4)),a P-type semiconductor with a direct bandgap(1.2-1.7eV),earth-abundant,non-toxic,and has a large absorption coefficient makes it extremely useful in optoelectronics and light-harvesting applications.In this work,CZTS is prepared by an ingenious,cost-effective colloidal route using the‘hotinjection’method with the usage of different ligands.The XRD and Raman spectroscopy shows the single-phase highly crystalline CZTS nanoparticles with kesterite structure.The TEM results show that the size of CZTS nanoparticles is about 2-5 nm and monodispersity is confirmed by DLS(Dynamic Light Scattering).FTIR confirms the presence of different ligands used in CZTS preparation.The Uv-vis absorption shows the direct bandgap of 1.5-1.7eV.The contact angle study shows the hydrophobic nature of as-synthesized CZTS nanoparticles which were further ligand exchanged with L-cysteine hydrochloride to make it hydrophilic to study the photocatalytic degradation activity of organic pollutants and industrial waste in the water.The photocatalysis experiments were performed under two conditions:(i)under bare sunlight(Intensity~900 W/m^(2))(ii)focussing the sample under the sunlight via converging lens(1800 W/m^(2)).The photocatalytic efficiencies were then compared and the best photocatalytic efficiency achieved under sunlight was 98.4%for organic pollutants and 75%for industrial waste via converging lens while the corresponding efficiencies with bare sunlight were 98.1% and 73% respectively.To the best of the author’s knowledge,a rapid and highly efficient photocatalysis of CZTS NPs employing a converging lens for water-remediation without the usage of noble&transition-metals has been reported for the first time.展开更多
文摘Copper tin sulfide （Cu2SnS3） was a potential earth abundant absorber material for photovoltaic device application. In this contribution, triclinic Cu2SnS3 film with phase pure composition and large grain size was fabricated from a hydrazine solution process using Cu, Sn and S as the precursors. Absorption measurement revealed this Cu2SnS3 film had a direct optical band gap of 0.88 eV, and Hall effect measurement indicated the film was p-type with hole mobility of 0.86 cmE/Vs. Finally Mo/Cu2SnS3/ CdS/ZnO/AZO/Au was produced and the best device efficiency achieved was 0.78%. Also, this device showed improved device performance during ambient storage. This study laid some foundation for the further improve- ment of Cu2SnS3 solar cell.
基金The author(PS)sincerely acknowledges the Council of Scientific&Industrial Research(CSIR)and AcSIR for providing necessary facilities to carry out the experimental work and also thank CSIR for providing Junior Research Fellowship(#31/001(521)/2018-EMR-I).
文摘CZTS(Cu_(2)ZnSnS_(4)),a P-type semiconductor with a direct bandgap(1.2-1.7eV),earth-abundant,non-toxic,and has a large absorption coefficient makes it extremely useful in optoelectronics and light-harvesting applications.In this work,CZTS is prepared by an ingenious,cost-effective colloidal route using the‘hotinjection’method with the usage of different ligands.The XRD and Raman spectroscopy shows the single-phase highly crystalline CZTS nanoparticles with kesterite structure.The TEM results show that the size of CZTS nanoparticles is about 2-5 nm and monodispersity is confirmed by DLS(Dynamic Light Scattering).FTIR confirms the presence of different ligands used in CZTS preparation.The Uv-vis absorption shows the direct bandgap of 1.5-1.7eV.The contact angle study shows the hydrophobic nature of as-synthesized CZTS nanoparticles which were further ligand exchanged with L-cysteine hydrochloride to make it hydrophilic to study the photocatalytic degradation activity of organic pollutants and industrial waste in the water.The photocatalysis experiments were performed under two conditions:(i)under bare sunlight(Intensity~900 W/m^(2))(ii)focussing the sample under the sunlight via converging lens(1800 W/m^(2)).The photocatalytic efficiencies were then compared and the best photocatalytic efficiency achieved under sunlight was 98.4%for organic pollutants and 75%for industrial waste via converging lens while the corresponding efficiencies with bare sunlight were 98.1% and 73% respectively.To the best of the author’s knowledge,a rapid and highly efficient photocatalysis of CZTS NPs employing a converging lens for water-remediation without the usage of noble&transition-metals has been reported for the first time.
