| Title: |
Compositional Gradient of Mixed Halide 2D Perovskite Interface Boosts Outdoor Stability of Highly Efficient Perovskite Solar Cells |
| Authors: |
Degani, Matteo; Pallotta, Riccardo; Pica, Giovanni; Karimipour, Masoud; Mirabelli, Alessandro James; Frohna, Kyle; Anaya, Miguel; Xu, Tianyu; Ma, ChangQi; Stranks, Samuel D.; Cantù, Monica Lira; Grancini, Giulia |
| Contributors: |
European Research Council; European Commission; Regione Lombardia; Ministero dell'Università e della Ricerca; Cassa per i servizi energetici e ambientali; Ministero della Transizione Ecologica; Royal Society (UK); Tata Group; Diamond Light Source (UK); Università degli studi di Pavia; Degani, Matteo; Pallotta, Riccardo; Pica, Giovanni; Karimipour, Masoud; Mirabelli, Alessandro James; Frohna, Kyle; Anaya, Miguel; #NODATA#; Ma, ChangQi; Stranks, Samuel D.; Cantù, Monica Lira; Grancini, Giulia |
| Publisher Information: |
Wiley-Blackwell |
| Publication Year: |
2025 |
| Collection: |
Digital.CSIC (Consejo Superior de Investigaciones Científicas / Spanish National Research Council) |
| Subject Terms: |
low-dimensional perovskite; mixed-halide composition; perovskite; solar cells; Ensure access to affordable; reliable; sustainable and modern energy for all; solar energy |
| Description: |
Interface engineering using self-assembled 2D perovskite interfaces is a consolidated route to efficient and durable perovskite solar cells. Whether the 2D perovskite forms a homogeneous conformal layer or is heterogeneously distributed on the surface, interface defects are passivated, leading to a general improvement in the device's open circuit voltage (VOC) and stability. Here, an innovative strategy is developed for manipulating the composition of the 2D/3D perovskite interface that results in the formation of a gradient halide distribution, which extends from the surface to the bulk. The use of a bromide-based 2D perovskite triggers a progressive Br/I exchange, affecting not only the surface but also the perovskite underneath. As a result, not only the device VOC improve, as expected, but also the photogenerated current is boosted, leading to a device efficiency of up to 24.4%. Such mixed halide gradient effectively passivates surface and bulk defects making the perovskite active layer more efficient and robust, as demonstrated by the superior device stability showing zero losses in performances upon 36 days (more than 800 h) test in outdoor conditions, those ones relevant for a marketable product. ; M.D. and R.P. contributed equally to this work. Authors acknowledge the European Research Council (ERC) Starting Grant 2018 under the European Union's Horizon 2020 research and innovation program (Grant Agreement No. 802862) that founded the “HY-NANO”. The authors are grateful to the project for infrastructures funded by Regione Lombardia RL3776. The authors are also thankful to The Ministero dell'Università e della Ricerca (MUR), University of Pavia through the program ″Dipartimenti di Eccellenza 2023–2027″ for funding and FARE (Framework per l'Attrazione e Il Rafforzamento delle Eccellenze per la Ricerca in Italia) Project EXPRESS (Exploring photo ferroelectricity in halide perovskites for optoelectronics) “Development and characterization of halide perovskites for photo ferroelectrics applications”. G.G. and ... |
| Document Type: |
article in journal/newspaper |
| File Description: |
aplication/pdf |
| Language: |
English |
| Relation: |
https://doi.org/10.1002/aenm.202404469; Sí; Advanced Energy Materials 15(17) : 2404469 (2025); https://hdl.handle.net/10261/394661 |
| DOI: |
10.1002/aenm.202404469 |
| Availability: |
https://hdl.handle.net/10261/394661; https://doi.org/10.1002/aenm.202404469 |
| Rights: |
info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.F24ED0F4 |
| Database: |
BASE |