Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO20)
DOI: https://doi.org/10.29363/nanoge.nipho.2020.020
Publication date: 25th November 2019
In this work, lead perovskites quantum dots with a complex cation in A-site and mixed halides, Cs0.1FA0.1MA0.8Pb(I3-xBrx), where x= 0, 1, 2 and 3, have been synthesized in toluene and characterized by different spectroscopic techniques. The influence of the complex A-site cation on the fluorescent emission has been studied in comparison with MAPI perovskite. As a result, a red shift in the emission spectrum has been found for the triple cation lead iodide perovskite against the MAPI, due to the composition of the A-site cation and not to a change in the crystalline structure as XRD patterns revealed. In the case of mixed halides perovskites quantum dots, a blue shift from the all iodide perovskite to the all bromide perovskite has been found, as expected, with a displacement in the emission maximum in comparison with the methylammonium lead perovskites quantum dots, demonstrating the influence of both, the mixed halides and A-site cation compositions, in the light emission of the perovskites quantum dots.
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