Correlation of band bending and ionic losses in 1.68 eV wide band gap perovskite solar cells

Scheler, Florian (avtor), Topič, Marko (avtor), Albrecht, Steve (avtor)

Perovskite solar cells (PSCs) are promising for high-efficiency tandem applications, but their long-term stability, particularly due to ion migration, remains a challenge. Despite progress in stabilizing PSCs, they still fall short compared to mature technologies like silicon. This study explores how different piperazinium salt treatments using iodide, chloride, tosylate, and bistriflimide anions affect the energetics, carrier dynamics, and stability of 1.68 eV bandgap PSCs. Chloride-based treatments achieved the highest power conversion efficiency (21.5%) and open-circuit voltage (1.28 V), correlating with stronger band bending and n-type character at the surface. At the same time, they showed reduced long-term stability due to increased ionic losses. Tosylate-treated devices offered the best balance, retaining 96.4% efficiency after 1000 h (ISOS-LC-1I). These findings suggest that targeted surface treatments can enhance both efficiency and stability in PSCs.

• Jezik: Angleški jezik
• Ključne besede: photovoltaics, solar cell, perovskite, loss analysis, interface passivation, ionic losses, perovskite solar cells, stability
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FE - Fakulteta za elektrotehniko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 15 str.
• Številčenje: Vol. 15, iss. 16, art. 2404726
• PID: 20.500.12556/RUL-169254
• UDK: 621.383.51
• ISSN pri članku: 1614-6840
• DOI: 10.1002/aenm.202404726
• COBISS.SI-ID: 227503363
• Datum objave v RUL: 21.05.2025

Gradivo je del revije

• Naslov: Advanced energy materials
• Skrajšan naslov: Adv. energy mater.
• Založnik: Wiley
• ISSN: 1614-6840
• COBISS.SI-ID: 522022169

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: fotovoltaika, sončna celica, perovskit, analiza izgub