Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)
Publication date: 28th August 2024
Organic-inorganic metal halide perovskites (OIHPs) have earned widespread attention in the photovoltaic field due to their exceptional optoelectronic properties, cost-effectiveness, and simple manufacturing process. Recently, the pre-synthesized perovskite powders has been widely discussed and studied. Compared to perovskite films prepared from mixtures of PbI₂ and organic salts as precursors, pre-synthesized perovskite powders offer lower deviations in molar stoichiometry. Additionally, the pre-synthesized perovskite powders can act as nuclei centers in precursor solution, promoting heterogeneous nucleation, which leads to the formation of highly oriented crystals in the perovskite films. These powders also have advantages such as better accuracy in stoichiometric ratios and lower trap state densities.
However, traditional methods for synthesizing perovskite powders rely on organic solvents (such as ACN, 2-Me) and inert gas environments, making it difficult to reduce the costs. This study proposes an economical method for synthesizing Cs₀.₁FA₀.₉PbI₃ microcrystals, using an eco-friendly aqueous synthesis process without the protection of inert gas. Moreover, this method allows the use of relatively low-purity raw materials to synthesize high-quality perovskite powders, providing a solid foundation for reducing the production costs of perovskite solar cells.
The financial support provided by the Energy Administration, Ministry of Economic Affairs, R.O.C. (Taiwan) under Contract No. 113-S0102 is gratefully acknowledged.
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