Publikation: Ligand engineering for improving the stability and optical properties of CsPbI3 perovskite nanocrystals
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Inorganic lead halide perovskite nanocrystals (NCs) have recently become one of the research topics for optoelectronic applications due to their excellent photophysical properties. Despite their notable thermal stability over organic-inorganic halide perovskites, CsPbI3 NCs suffer from the phase instability of α-CsPbI3 phase at room temperature and under ambient conditions. Here, the effects of 4-Hydroxybenzoic acid (4-HBA) as an additive to standard oleic acid – oleylamine pair on the stability and optical properties of CsPbI3 perovskite NCs are discussed. 4-HBA addition into perovskite NC systems causes a compressive strain on perovskite lattice, which leads to the formation of a mixed phase α- and γ-CsPbI3 phases while pristine perovskite has α-CsPbI3 phase. Time-dependent stability of the perovskite NCs was tested under an ethanol (EtOH) medium. After EtOH exposure of the perovskite NCs, CsPbI3 NCs transformed to non-perovskite phase in 1 h while 4-HBA added CsPbI3 NCs still have perovskite phase after 48 h. In addition to the improved optical properties of the perovskite NCs, 4-HBA addition remarkably improves CsPbI3 perovskite stability.
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YUCE CAKIR, Hurriyet, Yenal YALCINKAYA, Mustafa M. DEMIR, 2024. Ligand engineering for improving the stability and optical properties of CsPbI3 perovskite nanocrystals. In: Optical Materials. Elsevier. 2024, 152, 115420. ISSN 0925-3467. eISSN 1873-1252. Verfügbar unter: doi: 10.1016/j.optmat.2024.115420BibTex
@article{YuceCakir2024-06Ligan-71798, year={2024}, doi={10.1016/j.optmat.2024.115420}, title={Ligand engineering for improving the stability and optical properties of CsPbI<sub>3</sub> perovskite nanocrystals}, volume={152}, issn={0925-3467}, journal={Optical Materials}, author={Yuce Cakir, Hurriyet and Yalcinkaya, Yenal and Demir, Mustafa M.}, note={Article Number: 115420} }
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