Multicolor organic light emitting devices

Details Multicolor organic light emitting devices Multicolor organic light emitting devices

1994-12-13

1998-01-13

Nakarani, D. S.

Stock material or miscellaneous articles

Composite

Of quartz or glass

257 89, 257 90, 257 94, 257 96, 257 97, 257 98, 257440, 257443, 427 77, 427 78, 428336, 428433, 428434, 428457, B32B 1706, H01L 3100, H01L 3300

Patent

active

057077452

ABSTRACT:
A multicolor organic light emitting device employs vertically stacked layers of double heterostructure devices which are fabricated from organic compounds. The vertical stacked structure is formed on a glass base having a transparent coating of ITO or similar metal to provide a substrate. Deposited on the substrate is the vertical stacked arrangement of three double heterostructure devices, each fabricated from a suitable organic material. Stacking is implemented such that the double heterostructure with the longest wavelength is on the top of the stack. This constitutes the device emitting red light on the top with the device having the shortest wavelength, namely, the device emitting blue light, on the bottom of the stack. Located between the red and blue device structures is the green device structure. The devices are configured as stacked to provide a staircase profile whereby each device is separated from the other by a thin transparent conductive contact layer to enable light emanating from each of the devices to pass through the semitransparent contacts and through the lower device structures while further enabling each of the devices to receive a selective bias.

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