摘要
Sb_(2)S_(3) is a promising photovoltaic absorber with appropriate bandgap,excellent light absorption coefficient and great stability.However,the power conversion efficiency(PCE)of Sb_(2)S_(3) planar thin film solar cells is unsatisfactory for further commercial application due to low crystallinity and high resistivity of Sb_(2)S_(3) film.Here,we introduce an additive of 4-Chloro-3-nitrobenzenesulfonyl Chloride(CSCl)to alleviate these problems.The CSCl molecular contains two terminal Cl with lone pair electrons,which have the interaction with Sb atoms.Thus,the Sb_(2)S_(3) film with enhanced crystallization and low trap states has been obtained and the resistivity is also decreased.Furthermore,CSCl additive raises the Fermi level of the Sb_(2)S_(3) film,thereby enhancing the transport of electron from Sb_(2)S_(3) to TiO_(2).Consequently,the optimal PCE of Sb_(2)S_(3) solar cells is raised from 4.20%(control device)to 5.84%.Our research demonstrates a novel additive to enhance the photoelectric performance of Sb_(2)S_(3) solar cells.
基金
This research is supported by the Key Research and Development Program from Shaanxi Province,China(2020GXLH-Z-025)
the Shaanxi International Cooperation Project,China(2020KWZ-018)
the Fundamental Research Funds for the Central Universities,China(3102019ghxm003,3102019JC005,3102019ghjd001).
