High Stability White Organic Light-Emitting Diode (WOLED) Using Nano-Double-Ultra Thin Carrier Trapping Materials

Figure 1

The chemical structures of (a) NPB, (b) DPVBi, (c) Rubrene, and (d) BPhen and the schematic energy band diagrams of (e) device A, (f) device B, and (g) device C.

(a)

(b)

(c)

(d)

(e)

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(g)