University of Michigan

Changyeong Jeong

Stephen R Forrest

Lingjie Jay Guo

Caleb Coburn

Yongbum Park

A method of increasing light emission efficiency in an organic light emitting diode (OLED) eliminates or reduces at least one waveguide mode selected from the group consisting of: transverse electric (TE0) mode, transverse magnetic (TM1) mode, and combinations thereof by disposing an ultrathin electrically conductive transparent metallic electrode having a first polarity within the OLED. The OLED has a transparent substrate on which the ultrathin electrically conductive transparent metallic electrode is disposed. It also has an emissive active assembly for generating photons defining first and second opposite sides. A conductive transparent metallic electrode is disposed along the first side. A second transparent electrode having a second polarity opposite to the first polarity disposed adjacent to the second side of emissive active assembly. The methods include increasing an external quantum efficiency of the organic light emitting diode to ≥about 20%. OLEDs with such a design are also contemplated.

Elimination of waveguide modes in organic light-emitting diodes using an ultrathin transparent conductor

An organic light emitting device (OLED) is provided that includes a cathode and an anode; a blue emitting layer; and at least two hybrid red/green emitting layers. One of the at least two hybrid red/green emitting layers is a cathode side, red/green emitting layer that is disposed between the cathode and the blue emitting layer. The second of the at least two hybrid red/green emitting layers is an anode side, red/green emitting layer that is disposed between the blue emitting layer and the anode. The OLED emits white light.

Growing community of inventors

Ann Arbor, MI, United States of America

Changyeong Jeong