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Boosting photovoltaic performance for Sb 2 S 3 solar cells by ionic liquid-assisted hydrothermal synthesis

Bulk and surface trap-states in the Sb 2 S 3 films are considered one of the crucial energy loss mechanisms for achieving high photovoltaic performance in planar Sb 2 S 3 solar cells. Because ionic liquid additives offer interesting physicochemical properties to control the synthesis of inorganic ma...

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Bibliographic Details
Published in:Nanotechnology 2022-10, Vol.33 (44), p.445401
Main Authors: Alarcón-Altamirano, Yarimeth Ameyalli, Miranda-Gamboa, Ramses Alejandro, Baron-Jaimes, Agustin, Ortiz-Soto, Karla Arlen, Rincon, Marina Elizabeth, Jaramillo-Quintero, Oscar Andrés
Format: Article
Language:English
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Summary:Bulk and surface trap-states in the Sb 2 S 3 films are considered one of the crucial energy loss mechanisms for achieving high photovoltaic performance in planar Sb 2 S 3 solar cells. Because ionic liquid additives offer interesting physicochemical properties to control the synthesis of inorganic material, in this work we propose the addition of 1-Butyl-3-methylimidazolium hydrogen sulfate (BMIMHS) into a Sb 2 S 3 hydrothermal precursor solution as a facile way to fabricate low-defect Sb 2 S 3 solar cells. Lower presence of small particles on the surface, as well as higher crystallinity are demonstrated in the BMIMHS-assisted Sb 2 S 3 films. Moreover, analyses of dark current density-voltage J – V curves, surface photovoltage transient and intensity-modulated photocurrent spectroscopy have suggested that adding BMIMHS results in high-quality Sb 2 S 3 films and a successful defect passivation. Consequently, the best-performing BMIMHS-assisted device exhibits a 15.4% power conversion efficiency enhancement compared to that of control device. These findings show that ionic liquid BMIMHS can effectively be used to obtain high-quality Sb 2 S 3 films with low-defects and improved optoelectronic properties.
ISSN:0957-4484
1361-6528
DOI:10.1088/1361-6528/ac84e3