Lead Doped Ti-Oxo Clusters as Molecular Models of Perovskite-type PbTiO3 and Electron Transport Material in Solar Cells.

Lead Doped Ti-Oxo Clusters as Molecular Models of Perovskite-type PbTiO3 and Electron Transport Material in Solar Cells.
Chemistry. 2020 Mar 24;:
Authors: Zhou S, Li C, Fu H, Cao J, Zhang J, Zhang L
Abstract
In this work, we successfully prepared Pb-doped titanium-oxo clusters with core structures as isolated perovskite PbTiO3 species. In the obtained highly symmetric Pb8Ti7-oxo cluster, the central TiO6 octahedra are orthogonally extended to adjacent ones in corner-sharing way and the doped 8 Pb ions form a cubic arrangement, making it the first molecular model of perovskite PbTiO3. Moreover, they show high solution stability confirmed by MALDI-TOF-MS measurements. Based on such solution processability, they can be easily spin-coated into homogeneous films, which were further applied as electron transport materials in perovskite solar cells to give the average PCE of ~15 % and improved device stability. The developed bottom-up cluster assembly method opens an efficient way for the construction of atomically precise models of perovskite metal oxides, and provides potential molecular tools to extend their applications.
PMID: 32212175 [PubMed - as supplied by publisher]

Source: Chemistry - March 23, 2020 Category: Chemistry Authors: Zhou S, Li C, Fu H, Cao J, Zhang J, Zhang L Tags: Chemistry Source Type: research