Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
Publication date: 20th April 2022
Currently, it is well known the great potential of lead halide perovskite have shown in photovoltaic and optoelectronic devices because of their outstanding physical properties (high photoluminescent quantum yields, sharp absorption edge, energy band gap, fine tuning of optical properties, etc.). However, lead has been recognized as a responsible of multiple diseases and a pollutant in water and soil. Despite this, researcher have focused to find environmentally friendly options with the same physical properties and perovskite type structure. Among them, tin halide-based perovskites have drawn attention because energy band gap is optimal for photovoltaics applications. Chemical synthesis of tin halide perovskites quantum dots is a research hot spot since a pioneer work of Jellicoe and co-workers, but this goal has been hindered owing to stability problems under ambient conditions (Sn2+ can be oxidized to Sn4+ under moisture and oxygen conditions). Moreover, tin-based perovskites can be prepared by different solution processing methods (Antisolvent drop cast, LARP method), but in the literature there are few works about synthesis of this material by bottom- up approaches. It has been demonstrated that Ambiental- stable tin halide perovskite quantum dots can be prepared under tin- rich conditions. In this way, we develop a synthetic protocol to prepare different tin halide perovskite materials by hot injection method. We observe that molar ratio of long chain organic ligands, temperature and precursors can drastically affect in the morphology and physical properties of materials. Also, optical (Time- resolved photoluminescence, PLQY, photoluminescence and UV VIS measurements), structural (X ray diffraction) and morphological characterization have been carried out.
Authors acknowledge the financial support of European Union Horizon 2020 FET-OPEN research programme under grant agreement No 862656 (DROP_IT Project)
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