Fig. 9. White OLED with a single-layer architecture. (a) An electroluminescence spectrum at a current density of 0.1 mA cm–2. (b) A picture of the device with an emitting area of 16.6 mm × 6 mm. The sheet under the device is showing a color reference printed on white paper, and the original colors can be found at ; http://www.jst.go.jp/erato/isobe/.
