Charge-Transfer Enhancement by PEI/MXene Buffer Layer for Boosting Performance of Inverted Perovskite Solar Cells
devices. A set of complementary electrical and spectroscopic techniques confirmed that MXenes optimize PCBM/PEI/MX/Ag interfaces. The improved interfacial features result in suppressed recombination losses, increased charge carrier lifetime, and enhanced extraction of photogenerated charges. These improvements are reflected in the enhanced photovoltaic parameters, particularly the open-circuit voltage and fill factor. Notably, PEI/MX based PSCs show enhanced PCE achieving 22.0 ± 0.8% (23.1% for champion PSC device) when compared to the pure PEI based device (18.9 ± 0.6%). Hence, the results presented in this work indicate that solution-processable PEI/MX is a promising candidate to substitute conventional cathode buffer layer materials.
Authors
- Carlos F. O. Graeff (ORCID: https://orcid.org/0000-0003-0162-8273)
- Sílvia L. Fernandes
- Mirjana Dimitrievska (ORCID: https://orcid.org/0000-0002-9439-1019)
- M M A Cruz
- João P. F. Assunção (ORCID: https://orcid.org/0000-0001-5052-5700)
- Hugo G. Lemos (ORCID: https://orcid.org/0000-0003-4525-9967)
- Gabriel L. Nogueira (ORCID: https://orcid.org/0000-0001-9164-9697)
- Frank Nüesch (ORCID: https://orcid.org/0000-0003-0145-7611)
- Sidney A. Lourenço
- Jessica H. H. Rossato
Institutions
- Instituto Tecnológico de Aeronáutica (BR)
- Universidade Tecnológica Federal do Paraná (BR)
- Department of Physics, Mathematics and Informatics (BY)
- Division of Materials Science and Engineering (AU)
- Departamento de Ciência e Tecnologia (BR)
- École Polytechnique Fédérale de Lausanne (CH)
- Blinn College (US)
- Swiss Federal Laboratories for Materials Science and Technology (CH)
- Universidade Estadual Paulista (Unesp) (BR)
Publication Details
- Journal
- ACS Applied Materials & Interfaces
- Published
- 2026-05-12
- DOI
- https://doi.org/10.1021/acsami.6c01017
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Financiadora de Estudos e Projetos