The above inspiring results encourage us to figure out whether this CISS effect is applicable to more complex systems with multiple achiral layers in WOLEDs. Herein, the (S)-/(R)-PCNTPA chiral layer plus two achiral layers containing red DBP and green BDMAC-XT, respectively, are utilized to construct spin-polarized WOLEDs (spin-WOLEDs). The configuration of such three-emitting-layer WOLED (W1) is designed as ITO/HATCN (5 nm)/TAPC (50 nm)/1 wt% DBP: TcTa (5 nm)/30 wt% BDMAC-XT: CBP (3 nm)/40 wt% (S)-PCNTPA: PYD-2 (12 nm)/TmPyPB (40 nm)/LiF (1 nm)/Al (Fig. ). In comparison with the green spin-OLEDs discussed above, the configuration of this spin-WOLED is adjusted, considering that the blue emission of chiral layer is needed as one of three primary colors for white light. In green spin-OLEDs, owing to the dominative hole-transporting nature of (S)-/(R)-PCNTPA, the chiral deep-blue layer is placed at the hole injection region, and the holes can be easily transported from the hole injection and transport layers to the chiral deep-blue layer, and then to the achiral green layer. The exciton recombination occurs in the achiral green layer to generate green EL, and the bipolar host material (CBP) of the green layer also facilitates the exciton recombination in this layer. While in spin-WOLEDs, given the dominative electrontransporting nature of PYD-2 host, the chiral deep-blue layer is placed in the electron injection region to enhance exciton recombination in this layer for obtaining deep-blue emission. In addition, the bipolar CBP host can enhance the transport of electrons and holes, which broadens the exciton recombination zone to the adjacent achiral red layer. Thus, in spin-WOLEDs, it is envisioned that the spin-polarized charge carriers can get recombined in green, red and deep-blue layers simultaneously to yield white light with CP-EL signals.