Transparent organic light emitting devices

Publication Type:

Journal Article


Appl. Phys. Lett., AIP Publishing, Volume 68, Issue 19, p.2606-2608 (1996)




1996, 2013 and earlier


We report the demonstration of transparent organic light emitting devices (OLEDs) which are ∼70% transparent throughout the visible spectrum when
switched off, and emit light from both sides with a total external quantum
efficiency of ∼0.1% when turned on. The devices are Alq3‐based single
heterostructure OLEDs grown on an ITO‐coated glass substrate with a top
electrode composed of a very thin layer of Mg–Ag and an overlaying ITO
film. The top electrode is both electron injecting and transparent. The
transparent OLEDs are expected to be useful in high‐resolution full‐color
displays, as well as for helmet‐mounted, windshield‐mounted, or other
‘‘head‐up’’ display applications.