2D Inorganic Framework with Self-Transforming Luminescence Centers for Multicolor Emission

Multicolor luminescence is an attractive and emerging field for next-generation optoelectronic devices, including ultrathin displays, optical sensors, and wearable electronic devices. Currently, it is easy to achieve monochromatic emission, while the highly anticipated realization of multicolor luminescence in two-dimensional (2D) material is still blank. This is because the atomic thickness and structural sensitivity of 2D material make it extremely challenging to introduce multiple luminescent centers into it without structural collapse. Here, for the first time, we have designed a 2D inorganic framework with a wide bandgap and easily substitutable sites to embed self-transforming luminescence centers nondestructively and achieved multicolor emissions spanning from green to orange. These findings can provide a new paradigm for designing new 2D multicolor luminescent materials and extend a large margin of diverse applications.