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Abstract | Cited by

A Ce3+-based layered perovskite compound, Dion–Jacobson type RbCeTa2O7, has been discovered for the first time by introducing only a trivalent cerium ion to form [CeTa2O7]− layers. The unique green color was experimentally and theoretically ascribed to two charge transfer transitions of ligand-to-metal O2p → Ce4f and metal-to-metal Ce4f → Ta5d.

Graphical abstract: New layered perovskite family built from [CeTa2O7]− layers: coloring mechanism from unique multi-transitions

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