Molecular Design and Operational Stability: Toward Stable 3D/2D Perovskite Interlayers

Autor: Mohammad Khaja Nazeeruddin, Clémence Corminboeuf, Hiroyuke Kanda, Pascal Schouwink, Abdullah M. Asiri, Hoichang Yang, Sanghyun Paek, Rokas Gegevičius, Hobeom Kim, Kun-Han Lin, Hyung-Joong Yun, Mingyuan Pei, Marius Franckevičius, Cristina Roldán-Carmona, Kyung Taek Cho, Nikita Drigo
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Materials science
perfluorobenzylammonium iodide
Passivation
General Chemical Engineering
Iodide
General Physics and Astronomy
Medicine (miscellaneous)
Halide
02 engineering and technology
2d perovskites
migration
010402 general chemistry
01 natural sciences
Biochemistry
Genetics and Molecular Biology (miscellaneous)
efficient
crystal
Crystal
3d perovskites
3D perovskites
2D perovskites
2d interfaces
General Materials Science
stable 3D/2D interfaces
passivation
lcsh:Science
bilayer perovskite solar cells
degradation
Perovskite (structure)
chemistry.chemical_classification
Halogen bond
Communication
Intermolecular force
Energy conversion efficiency
General Engineering
021001 nanoscience & nanotechnology
Communications
0104 chemical sciences
solar-cells
Chemical engineering
chemistry
lcsh:Q
stable 3d
0210 nano-technology
Zdroj: Advanced Science, Vol 7, Iss 19, Pp n/a-n/a (2020)
Advanced Science
ISSN: 2198-3844
Popis: Despite organic/inorganic lead halide perovskite solar cells becoming one of the most promising next‐generation photovoltaic materials, instability under heat and light soaking remains unsolved. In this work, a highly hydrophobic cation, perfluorobenzylammonium iodide (5FBzAI), is designed and a 2D perovskite with reinforced intermolecular interactions is engineered, providing improved passivation at the interface that reduces charge recombination and enhances cell stability compared with benchmark 2D systems. Motivated by the strong halogen bond interaction, (5FBzAI)2PbI4 used as a capping layer aligns in in‐plane crystal orientation, inducing a reproducible increase of ≈60 mV in the V oc, a twofold improvement compared with its analogous monofluorinated phenylethylammonium iodide (PEAI) recently reported. This endows the system with high power conversion efficiency of 21.65% and extended operational stability after 1100 h of continuous illumination, outlining directions for future work.
2D perovskites are of great importance to increase both the efficiency and stability of perovskite interfaces. Motivated by the stronger halogen bond interaction, (5FBzAI)2PbI4 used as a capping layer in 3D/2D systems self‐organizes with an in‐plane crystal orientation, inducing a reproducible increase of ≈60 mV in the V oc, and remarkable operational stability.
Databáze: OpenAIRE
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