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Effective additive for enhancing the performance of Sb2S3 planar thin film solar cells
Journal of Materiomics ( IF 8.4 ) Pub Date : 2021-02-11 , DOI: 10.1016/j.jmat.2021.02.001
Hui Zhou , Jian Han , Xingyu Pu , Xuanhua Li

Sb2S3 is a promising photovoltaic absorber with appropriate bandgap, excellent light absorption coefficient and great stability. However, the power conversion efficiency (PCE) of Sb2S3 planar thin film solar cells is unsatisfactory for further commercial application due to low crystallinity and high resistivity of Sb2S3 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 Sb2S3 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 Sb2S3 film, thereby enhancing the transport of electron from Sb2S3 to TiO2. Consequently, the optimal PCE of Sb2S3 solar cells is raised from 4.20% (control device) to 5.84%. Our research demonstrates a novel additive to enhance the photoelectric performance of Sb2S3 solar cells.



中文翻译:

提高Sb 2 S 3平面薄膜太阳能电池性能的有效添加剂

Sb 2 S 3是一种很有前途的光伏吸收体,具有合适的带隙、优异的光吸收系数和良好的稳定性。然而,由于Sb 2 S 3薄膜的低结晶度和高电阻率,Sb 2 S 3平面薄膜太阳能电池的功率转换效率(PCE)不能满足进一步的商业应用。在这里,我们引入了 4-Chloro-3-nitrobenzosulfonyl Chloride (CSCl) 的添加剂来缓解这些问题。CSCl分子含有两个带有孤对电子的末端Cl,它们与Sb原子发生相互作用。因此,Sb 2 S 3获得了具有增强结晶和低陷阱态的薄膜,并且电阻率也降低了。此外,CSCl添加剂提高了Sb 2 S 3膜的费米能级,从而增强了电子从Sb 2 S 3到TiO 2的传输。因此,Sb 2 S 3太阳能电池的最佳PCE从4.20%(控制装置)提高到5.84%。我们的研究证明了一种新型添加剂可以提高 Sb 2 S 3太阳能电池的光电性能。

更新日期:2021-02-11
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