One of the highly explores application of pyrene monomer emission is in organic light emitting doides (OLEDs). Pyrene monomer emission lies near pure blue region which is highly desirable on electroluminiscent devices. Excimer emission produce long wavelength emission which spoils the color purity of emission. So if you have good solid state monomer emission of pyrene then you can go for oled device fabrication also.
OLEDs are the key industrial application. Within academia there is still much need to understand the photophysical and photochemical properties of pyrene as it is one of the key simple molecules available with a rich history and future of emission both from a chemical and physics point of view.