Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
DOI: https://doi.org/10.29363/nanoge.matsus.2023.097
Publication date: 22nd December 2022
Halide perovskites constitute a fascinating family of materials that has revolutionized the optoelectronic field in the last decade. Halide perovskite are soft materials presenting a benign defect physics that can be prepared a relative low temperature. This appealing property, from the point of view of industrialization, also makes of material and device stability the Achiles heel of the optoelectronic halide perovskite technology. Consequently, the development of stabilization procedures is probably the current main topic of these systems. The soft nature that limits stability also allows the easy combination of halide perovskites with other materials. In this talk we show as an accurate choice of additives can promote interesting synergies boosting the long term stability of halide perovskites devices. We show how the use of PbS quantum dots increases significantly the stability of FAPbI3. Incorporation of PbS QDs allows the dramatic decrease of the annealing temperature for the formation of black FAPbI3 phase perovskite thin film, from the 170ºC required without QDs to 85ºC when QDs are present. We have also verified the synergic combination of different additives for a significant increase of device stability of Pb free Sn-based solar cells, LEDs and lasers. Eventually, stabilization of halide perovskite nanoparticles is a necessary step for the development of high performance Halide Perovskite LEDs. Control of post synthetic washing processes as well as nanoparticle capping allows the preparation of LEDs with enhanced performance and stability.
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