Polymeric interlayer in CdS-Free electron-selective contact for Sb2Se3 thin-film solar cells

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 impa...

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Detalles Bibliográficos
Autores: Rovira Ferrer, David|||0000-0003-3867-8987, Ros Costals, Eloi|||0000-0002-1952-6614, Tom, Thomas, Jiménez Guerra, Maykel|||0000-0002-1778-8805, Asensi López, José Miguel, Voz Sánchez, Cristóbal|||0000-0002-0320-9606, Lopez Vidrier, Julià, Puigdollers i González, Joaquim|||0000-0002-1834-2565, Bertomeu Balagueró, Joan, Saucedo Silva, Edgardo Ademar|||0000-0003-2123-6162
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/385619
Acceso en línea:https://hdl.handle.net/2117/385619
https://dx.doi.org/10.3390/ijms24043088
Access Level:acceso abierto
Palabra clave:Solar cells
Semiconductors
Thin-film photovoltaics
Conjugated polyelectrolyte
Dipole
Selective contacts
Cèl·lules solars
Àrees temàtiques de la UPC::Energies::Energia solar fotovoltaica::Cèl·lules solars
Àrees temàtiques de la UPC::Enginyeria electrònica::Circuits electrònics
Descripción
Sumario: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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