This study explores the challenges facing silicon-based Photodiodes (PDs) in color discrimination due to their thickness requirement and light absorption issues, prompting the investigation of perovskite halide materials as alternatives. However, the susceptibility of perovskite materials to degradation from humidity and oxygen remains a significant obstacle. To address this, the study proposes a novel approach involving the incorporation of PMMA/sodium borate salt (Borax) additives to reduce trap densities and enhance crystal quality in perovskite layers. The findings reveal that these additives act as passivators for Pb2+ ions and promote cross-linking between perovskite grains, leading to improved performance and stability of blue-light-targeting PDs. Specifically, the optimized Borax amount yields a PD with remarkable responsivity, external quantum efficiency, and stability, showcasing a promising pathway for future commercialization of photodiodes.
All solid-state solar cells based on organometal trihalide perovskite absorbers have already achieved distinguished power conversion efficiency (PCE) to over 25% and further improvements are expected up to 27%. Now, the research on perovskite solar cells (PSCs) has been moving toward commercialization. To facilitate commercialization of these great solar cells, some technical issues such as long-term stability, large scale fabrication process, and Pb-related hazardous materials need to be solved. Also, flexible perovskite solar cell using plastic substrate can be used in niche applications such as portable electrical chargers, electronic textiles, and large-scale industrial roofing. This talk is dealing with our recent efforts to facilitate commercialization of perovskite solar cells. For examples, we introduce a recycling technology of perovskite solar cells, which covers the regeneration process of Pb contained perovskite layer as well as recycling process of Au electrodes and transparent conducting oxide glass. Also, simple fabrication technologies for realizing large scale perovskite module are introduced and recent effort for achieving high efficiency module is going to be presented. Precursor technology is of great importance for yielding high efficiency and reproducibility of PSC, which is one of topics in this talk. Finally, recent interesting results regarding flexible perovskite cells will be discussed.
KEYWORDS: Perovskite, Solar cells, Materials processing, Solid state physics, Absorption, Thin films, Photovoltaics, Crystals, Nanoparticles, Electron transport
All solid-state solar cells based on organometal trihalide perovskite absorbers have already achieved distinguished power conversion efficiency (PCE) to over 23% and further improvements are expected up to 25%. These novel organometal halide perovskite absorbers which possess exceptionally strong and broad light absorption enable to approach the performances of the best thin film technologies. To commercialize these great solar cells, there are many bottlenecks such as long-term stability, large scale fabrication process, and environmental issues.
In this presentation, we introduce our recent efforts to improve long term stability and solve environmental issues, which will facilitate commercialization of Perovskite photovoltaic system. For examples, we introduce a recycling technology of perovskite solar cells, which will facilitate the commercialization as well as solve the environmental issues of perovskite solar cells. Also, we are going to show new interfacial layers and highly crystalline SnO2 nanoparticle layers for electron transport layer. Also, we will show a large scale coating methodology for enabling large size module fabrication by using a new solvent extractor, anisole. Also, stability issue of perovskite materials regarding charge generation and extraction will be discussed.
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