Functionalized Phenyl Methanaminium Salts Provide Highly Stable Perovskite Solar Cells

Date

2025-03-01

Author

Yaşa, Mustafa
Celik, Esra Bag
Gao, Xiao-Xin
Karabağ, Zeynep Gözükara
Gunes, Ummugulsum
Syzgantseva, Olga A.
Syzgantseva, Maria A.
Zhong, Liping
Züttel, Andreas
Dyson, Paul J.
Nazeeruddin, Mohammad Khaja
Toppare, Levent Kamil
Yerci, Selçuk
Günbaş, Emrullah Görkem

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One of the leading approaches to enhancing the performance and stability of perovskite solar cells (PSCs) involves passivating the perovskite surface and grain boundaries with large ammonium salts. Here, we report the synthesis of furan-, thiophene-, and selenophene-functionalized phenyl methanaminium iodide salts (FPMAI, TPMAI, and SPMAI) and their application as passivating agents on 3D [(Cs0.04FA0.85MA0.11)Pb(I0.96Br0.01Cl0.03)3] perovskite. The TPMAI-passivated PSCs performed the best and achieved a power conversion efficiency (PCE) of 23.15% compared to the reference (without a passivating agent) at 20.91%. Efficiencies reduced to 98 and 54% of the initial value after 1250 h of continuous illumination for TPMAI-treated PSCs and the reference, respectively. DFT calculations revealed that TPMAI offers superior passivation, disfavoring iodine vacancy formation. Our findings highlight the potential of functionalized PMAI salts as passivation agents for improved efficiency and stability in PSCs.

Subject Keywords

passivation, perovskite solar cells, phenyl methanaminium salt, photovoltaics, recombination states

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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105000040178&origin=inward
https://hdl.handle.net/11511/114402

Collections

Department of Chemistry, Article