TANDEM WHITE OLED WITH EFFICIENT ELECTRON TRANSFER

摘要

white of the present invention a tandem light-emitting OLED device with first and second light-emitting unit disposed between the positive electrode and the negative electrode; The first and the intermediate connector comprises a n- type layer and the p- type layer disposed between the second light emitting unit; And adjacent to the n- type layer of the intermediate connector and pullulan 7, 10- 25% of at least does not have an aromatic ring to form a ring in the center of ten diaryl-substituted fluorene is pullulan containing compound X ten-containing e - has the spaced-apart positive and negative electrodes containing the transport layer ;