Preparation And Photoelectrical Properties Of In-Based Sulphide Nanomaterials

Nano-sized semiconductor materials have attracted much attention due to their remarkable optical,electrical and catalytic properties,which have already inspired researchers' great interests on applications in optoelectronic,photovoltaic industries and solar cell device.Among them,In-based sulphide nanomaterials is deemed to one of the most promising materials due to its good performance on phothocatalysis and photovoltaics.Recently,a lot of works have been reported about In-based sulphide nanomaterials,such as new preparation methods of In-based sulphide nanomaterials,the influence of doping and different concertration ratios on the host materials.In this paper,we focus on the binary and ternary of In-based sulphide nanomaterials,and studied the influence of the preparation method,doping,the molar ratios of the host materials and reaction temperature of In-based sulphide nanomaterials.We introduced the context of the article from three parts.First,we prepared the two-dimensional In₂S₃ ultrathin nanoflakes using a hydrothermal method successflully,we study the copper doping of In₂S₃ through adjusting the doping amount,and we also prepared of the doping samples with different Cu/In molar ratios.Based on the study of absorption spectrum of samples,we found that the sample absorption peaks redshift with the increasing of doping amount gradually.XRD results show that with the increase of doping concentration,the samples changed from binary In₂S₃ to ternary CuInS₂ constantly,and doping samples also show great potential in photocurrent response.Next,we studied the AgInS₂ nanocrystals,mainly studied AgInS₂ quantum dots with different Ag/In molar ratios and the properties of AgInS₂/ZnS core/shell structure quantum dots,and explores the influence of different Ag/In molar ratios and ZnS shell of quantum dots.Finally,we explored the effect of different reaction temperature and the Cu/In molar ratios of the optical properties of CuInS₂ nanocrystals,we explains the role of 1-dodecanethio int the reaction process.We found that copper plays an important role in replacing indium vacancies in the growth of CuInS₂ nanocrystals,thus the luminescence intensity is enhanced.Under acertain temperature,with the increase of reaction temperature,the luminescence intensity of CuInS₂ quantume dots can be improved.But,as the reaction temperature continues to increase,the luminescence intensity of CuInS₂ quantum dots will decrease.