| abstract |
A multicolored organic light emitting device employs vertically stacked layers of double heterostructure devices that are made from organic compounds. The vertically stacked structure is formed on a glass base that has a transparent coating of indium tin oxide (ITO) or a similar metal to provide a substrate. Deposited on the substrate is a vertically stacked arrangement of three heterostructured double devices, each made from an appropriate organic material. Stacking is implemented so that the double heterostructure with the longest wavelength is at the top of the stack. This constitutes the device that emits red light at the top, leaving the device with the shortest wavelength, that is, the blue light emitting device, at the bottom of the battery. Located between the red and blue device structures is the green device structure. The devices are in a stacked configuration to provide a staggered profile whereby each device is separated from the other by a thin transparent conductive contact layer that allows light emanating from each of the devices to pass through the semi-transparent contacts and through of the lower device, further allowing each of the devices to receive selective bias. |