Concentration-dependent luminescence is a fascinating phenomenon whereby the intensity or color of the emission change as the concentration of a luminophore varies. The exact behavior depends on various factors, including the properties of the luminophore, the conditions of the environment, and whether the sample is in a solid or solution state. In several important applications, such as organic light-emitting diodes (OLED) , bioimaging and chemical sensing , the relationship between the concentration and the properties of luminescence is a critical factor to consider.