Tandem white organic light-emitting device using non-modified Ag layer as cathode and interconnecting layer

- Effective electron injection is achieved when Ag is deposited on Bphen.
- Single OLED with Ag cathode shows comparable performance to that of device with Mg:Ag cathode.
- Tandem WOLED using non-modified Ag film as cathode and interconnecting layer is demonstrated.
- Tandem WOLED exhibits low driving voltage, high power efficiency and low efficiency roll-off.