Semitransparent white organic light-emitting devices with symmetrical electrode structure

A semitransparent white-light organic light-emitting device (SWOLED) with an (Ag/Alq3)2 cathode and (Alq3/Ag)2 anode was fabricated. The light emitted from the emitters subjecting to the same propagation process because of the symmetrical electrode structure. The device showed few differences in luminance, power distribution of electroluminescence (EL) spectra, efficiency and chromaticity coordinates from both sides. The maximum total current efficiency of the SWOLED (8.46 cd/A) is comparable to that of the corresponding bottom-emitting OLED (9.2 cd/A). The SWOLEDs have potential uses as tinted thin-film coatings on architectural surfaces, such as windows and walls. In addition, this kind of electrode can be used in flexible OLEDs.

Figure optionsDownload as PowerPoint slideHighlights
► Semitransparent white-light organic light-emitting device with symmetrical electrode structure was fabricated.
► (Ag/Alq3)2 were used as cathode and anode.
► The device showed few differences in performances from both sides.
► The maximum total current efficiency of the device is comparable to that of the corresponding bottom-emitting device.