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Multidentate anchoring through additive engineering for highly efficient Sb2S3 planar thin film solar cells.
- Source :
- Journal of Materials Science & Technology; Oct2021, Vol. 89, p36-44, 9p
- Publication Year :
- 2021
-
Abstract
- [Display omitted] Sb 2 S 3 is a promising candidate for the flexible solar cells or the top subcells in tandem solar cells due to its wide-bandgap, less toxic, acceptable cost and progressive power conversion efficiency (PCE). However, the poor quality and high trap states of Sb 2 S 3 films limit the device performance further enhancement. Herein, we adopt a multidentate ionic liquid, tetramethylammonium hexafluorophosphate ([TMA][PF 6 ]) as a novel additive to address this issue. The octahedral [PF 6 ]<superscript>−</superscript> contains six different oriented fluorine atoms with the lone pair electrons, which could coordinate with Sb atoms due to the multidentate anchoring. Thus, the high-quality Sb 2 S 3 film with low trap states has been achieved. Moreover, the Fermi level of the Sb 2 S 3 film has been upshifted, thereby showing an effective charge transfer. As a result, all photovoltaic parameters of the optimized Sb 2 S 3 devices are obviously enhanced, boosting the final PCE from 4.43 (control device) to 6.83 %. Our study about the multidentate anchoring is manifested to be an effective method to enhance the Sb 2 S 3 device performance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10050302
- Volume :
- 89
- Database :
- Supplemental Index
- Journal :
- Journal of Materials Science & Technology
- Publication Type :
- Periodical
- Accession number :
- 152200688
- Full Text :
- https://doi.org/10.1016/j.jmst.2021.01.078