Molecular Flexibility Impacts the Formation of 2D/3D Perovskite Heterointerfaces and Device Efficiency

• DOI: 10.29363/nanoge.matsus.2024.445
• Publication Date: 2024-03-12T12:24:58Z
• Authors: Charles Almeida; Lucas Scalon; André Fonseca; Paulo Marchezi; Caio Oliveira; Luiz Fernando Zag...; Ana Flávia Nogueira

Molecular Flexibility Impacts the Formation of 2D/3D Perovskite Heterointerfaces and Device EfficiencyCharles Almeida a, Lucas Scalon b, André Fonseca Paulo Marchezi c, Caio Oliveira Luiz Fernando Zagonel Ana Flávia Nogueira ba Gleb Wataghin Institute Physics, University Campinas, São 13083-859, Brazilb Chemistry, 13083-970, Brazilc California San Diego, 92093-0021, United States AmericaMaterials for Sustainable Development Conference (MATSUS)Proceedings MATSUS Spring 2024 (MATSUS24)#2Dpero - 2D perovskites: chemical versatility, photophysics applicationsBarcelona, Spain, March 4th 8thOrganizers: Claudio Quarti Yana VaynzofOral, Charles Almeida, presentation 445DOI: https://doi.org/10.29363/nanoge.matsus.2024.445Publication date: 18th December 2023Perovskite materials have gained attention in field photovoltaics due to their high conversion efficiency, tunable bandgaps, charge carrier mobility, low exciton binding energy, ease synthesis [1]. Solar Cells (PSCs) demonstrated promising Power Conversion Efficiencies (PCE) up 25\%, comparable widely commercialized crystalline silicon counterparts. However, achieving highly efficient PSCs requires careful optimization perovskite absorbing layer interfaces with charge-selective contacts. This study focuses on interface passivation strategies, a particular emphasis use organic molecules surface treatment. Organic molecules, especially those containing ammonium (NH3$^+$), show promise passivating trap states [2-3]. The introduction ammonium-based post-surface treatments leads formation low-dimensional structures, impacting quantum confinement regime. investigation approaches correlation between molecular flexibility heterointerfaces, exploring subsequent effects solar cell performance. synthesizes two variations well-studied phenylethylammonium iodide (PEAI): more rigid trans-2-phenylcyclopropylammonium (PCPEAI) flexible cyclohexylethylammonium (CHEAI). Detailed analyses, including SEM-Cathodoluminescence [4], reveal that phases present heterogeneous distribution over 3D surface. also highlights absence $\pi$-$\pi$ stacking interactions higher degree freedom CHEAI molecule prevent undesirable aggregation, resulting improved device efficiency. CHEAI-based devices exhibit commendable efficiency close 21\%. results indicate plays crucial role facilitating phases. research contributes valuable insights into intricate relationship flexibility, PSC findings offer guidance designing stable cells, making progress next-generation photovoltaic technologies. References:[1] Raphael, E., Silva, M. N., Szostak, R., Schiavon, A., & Nogueira, A. F. Células solares de perovskitas: uma nova tecnologia emergente. Quim. Nova 2018 41, 61-74.[2] Park, S. M., Wei, Xu, J., Atapattu, H. Eickemeyer, T., Darabi, K., ... Sargent, E. Engineering ligand reactivity enables high-temperature operation cells. Science 2023, 381(6654), 209-215.[3] Kodalle, Moral, R. F., Scalon, L., Abdelsamie, Marchezi, P. Sutter‐Fella, C. Revealing Transient Dynamics Optoelectronic Properties Ruddlesden‐Popper Phases Perovskites. Adv. Energy Mater. 13(33), 2201490.[4] Guthrey, H., Moseley, J. A review perspective cathodoluminescence analysis halide perovskites. 2020, 10(26), 1903840.Acknowledgements:We acknowledge support from FAPESP (São Research Foundation, Grant Numbers 2020/04406-5, 2021/06893-3, 2022/06645-2) © FUNDACIO DE LA COMUNITAT VALENCIANA SCITOnanoGe is prestigious brand successful science conferences are developed along year different areas world since 2009. Our worldwide cover cutting-edge topics like photovoltaics, optoelectronics, fuel conversion, science, catalysis two-dimensional materials, among many others.nanoGe Fall MeetingnanoGe Meeting (NFM) multiple symposia conference celebrated yearly focused broad set advanced preparation, fundamental properties, applications, fields such as renewable lighting, semiconductor dots, 2-D synthesis, carriers dynamics, microscopy spectroscopy semiconductors fundamentals, etc.nanoGe MeetingThis unique series preparation properties energy (photovoltaics, batteries), bioimaging, etc.International Hybrid PhotovoltaicsInternational Photovoltaics (HOPV) May. main development, function modeling hybrid now dominated by cells but other technologies, dot dye-sensitized integration photoelectrochemical production.Asia-Pacific International Perovskite, OptoelectronicsThe Asia-Pacific Optoelectronics (IPEROP) discussed every gathering recent advances material fabrication materials. Photovoltaic analyzed physics applications. covers developments light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear colloidal nanostructures, light-matter coupling.International Thin Film Photonics (NIPHO) best place hear latest well coupling.