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Speaker: Milena Arciniegas

Title: Structural Tunability of Layered Perovskites

Abstract: In view of the extreme versatile architecture of layered perovskites and their simple processing, these materials are promising for applications beyond solar. 1 The self-intercalation of organic molecules and inorganic slabs opens a door toward the engineering of efficient emitters from a single material, chiral materials, piezoelectrics, and more recently toward their application in electrochemical water splitting. 2 In this work, we rationalize the design of the organic layer made by cations from the amine family and study how the accommodation of the functional group at the anchor side, as well as, the length of the tail affect the material lattice dynamic and light emission.3 We discover a new set of single layer white and blue-emitting platelets and we demonstrate that the careful selection of the organic cations allows tuning of the colour emission of the resulting materials, from blue to warm white and pure white colours. Our work provides experimental guidelines for the selection of organic cations in these materials that can be extended to other organic molecules and unravel new functionalities. 

References:
1. Avi Mathur, Hua Fan, and Vivek Maheshwari. Mater. Adv., 2021,2, 5274-5299. 

2. Xiaotong Li, Justin M. Hoffman, and Mercouri G. Kanatzidis. Chem. Rev. 2021 121 (4), 2230-2291 

3. Dhanabalan, B., Biffi, G., Moliterni, A., Olieric, V., Giannini, C., Saleh, G., Ponet, L., Prato, M., Imran, M., Manna, L., Krahne, R., Artyukhin, S., Arciniegas, M. P., Adv. Mater. 2021, 33, 2008004.