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19 June 2024 Enhanced Efficiency and Stability in Optoelectronic Devices through the Synergistic Interaction of Lead Halide Perovskites and Graphene
Carmen Coya, Maria Vila, Javier Bartolomé, Carlos Daniel Redondo, Alicia de Andrés
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Proceedings Volume PC13014, Photonics for Solar Energy Systems X; PC130140E (2024) https://doi.org/10.1117/12.3017406
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
Here, is presented the impact of pristine graphene, used as additive in the active layer or as substrate, in Lead Halide Perovskites based Solar Cells and LEDs. A small concentration of graphene nanoplatelets, well above the percolation threshold, either in the PEDOT:PSS hole transport layer or in the MAPbI3 active layer of a SC produces structural changes that improve both the efficiency and the stability of the device. Similarly, adding graphene in MAPbBr3 active layer of LEDs lead to larger grain domain sizes and increased luminance. Finally, for MAPbBr3 thin films grown directly on substrates of graphene/graphene oxide, the concentration of the precursor solution and the nature of the substrate lead to a continuous film, or dispersed particles of nano-to-micrometer sizes. The crystal size and microstrain determines the emission properties, showing hugely enhanced photostabilities compared to MAPbBr3 on glass, capable of enduring light densities up to > 100 kW/cm2 for several minutes. These results open new opportunities for the design of nanoengineered photovoltaic devices based on combined graphene/perovskites with improved stability and performance.
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Carmen Coya, Maria Vila, Javier Bartolomé, Carlos Daniel Redondo, and Alicia de Andrés "Enhanced Efficiency and Stability in Optoelectronic Devices through the Synergistic Interaction of Lead Halide Perovskites and Graphene", Proc. SPIE PC13014, Photonics for Solar Energy Systems X, PC130140E (19 June 2024); https://doi.org/10.1117/12.3017406
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KEYWORDS
Graphene
Perovskite
Lead
Optoelectronic devices
Crystals
Design and modelling
Photodetectors
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