Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV23)
Publication date: 30th March 2023
Despite its great potential, perovskite solar cell technology is still in the early stages of commercialization, partially due to its low environmental compatibility and the presence of toxic lead. This presents a major challenge; excessive use of lead should be restricted by identifying alternative, environmentally-friendly perovskites. An idea to tackle this challenge is the unexplored class of lead-free chalcogenide perovskites of the type of (Ba,Sr)ZrS3 [1] and LaYS3 [2] which have shown promising optoelectronic properties and chemical stability. Quite notably, there are already published papers where PV efficiencies over 22% have been predicted [3]. However, synthesis of high-quality thin films of such materials and solar cells remains challenging, mainly due to the need of high temperatures for good crystallization. [4]
Here we present our results of fabricating orthorhombic BaZrS3 powders, and then films with solution-processing at temperatures lower than 600 0C. These films consist of particles at the nano scale, presenting an optical bandgap of 1.8-2.1 eV and a photoluminescence at around 2.1 eV (depending on the excitation). Preliminary results on device fabrication prove that this perovskite can indeed be a photovoltaic material and future optimization studies (trap passivation, better optoelectronic quality etc.) will pave the way for further improving device performance.
The research project was supported by the Hellenic Foundation for Research and Innovation (H.F.R.I.) under the “1st Call for H.F.R.I. Research Projects to support Faculty members and Researchers and the procurement of high-cost research equipment” (Project Number: 1027). We acknowledge the financial support from the European Research Council (ERC) through Consolidator Grant (818615-MIX2FIX).
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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