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Title: Polymeric interlayer in CdS-free Electron-Selective Contact for Sb2Se3 thin-film solar cells
Author: Rovira, David
Ros Costals, Eloi
Tom, Thomas
Jiménez, Maykel
Asensi López, José Miguel
Voz Sánchez, Cristóbal
López Vidrier, Julià
Puigdollers i González, Joaquim
Bertomeu i Balagueró, Joan
Saucedo Silva, Edgardo
Keywords: Polielectròlits
Moments dipolars
Dipole moments
Issue Date: 4-Feb-2023
Publisher: MDPI
Abstract: High open-circuit voltage in Sb2Se3 thin-film solar cells is a key challenge in the development of earth-abundant photovoltaic devices. CdS selective layers have been used as the standard electron contact in this technology. Long-term scalability issues due to cadmium toxicity and environmental impact are of great concern. In this study, we propose a ZnO-based buffer layer with a polymer-film-modified top interface to replace CdS in Sb2Se3 photovoltaic devices. The branched polyethylenimine layer at the ZnO and transparent electrode interface enhanced the performance of Sb2Se3 solar cells. An important increase in open-circuit voltage from 243 mV to 344 mV and a maximum efficiency of 2.4% was achieved. This study attempts to establish a relation between the use of conjugated polyelectrolyte thin films in chalcogenide photovoltaics and the resulting device improvements.
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It is part of: International Journal of Molecular Sciences, 2023, vol. 24, num. 4, p. 3088-1-3088-17
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ISSN: 1661-6596
Appears in Collections:Articles publicats en revistes (Física Aplicada)

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