Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
DOI: https://doi.org/10.29363/nanoge.matsusspring.2025.358
Publication date: 16th December 2024
Lead-free halide double perovskites (HDPs, A2BB’X6) with attractive optical and electronic features are regarded as one of the most promising alternatives to overcome the toxicity and stability issues of lead halide perovskites. They provide a wide range of possible combinations and rich substitutional chemistry with interesting properties for various optoelectronic devices.[1] However, the performance of state-of-the-art lead-free HDPs is not yet comparable to that of lead halide perovskites, especially in the photovoltaic field.[2] One of the main reasons for this is that HDPs usually have large and/or indirect bandgaps, which limit their optical and optoelectronic properties in the visible and infrared regions. In this presentation, I will talk about our work on double perovskites, including the fabrication of the first planar double perovskite solar cell devices, and the modification of the bandgap and optical properties of HDPs using metal doping/alloying and crystallization control,[3],[4] as well as provide detailed understanding of the alloying at the atomic level.
Thanks the Swedish Research Council Vetenskapsrådet (Grant no. 2022–04474) and MIRAI seed funding.
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