Provided are a polyvinyl pyrrole host material emitting highly efficient phosphorescence, a luminescent layer using the material, and an organic electroluminescent display device. This permits its users to define access settings for their user information thereby limiting which other users may access the user information. Uniquely, actuation of the dispensing plunger creates a negative pressure internally of the dispensing chamber of the dispenser so as to assist the uniform withdrawal of formula from the cartridge.