White stacked electrophosphorescent organic light-emitting devices employing MoO₃ as a charge-generation layer

The high-efficiency white light stacked organic light emitting devices (SOLED) based on phosphorent emitters with Li-doped electron transporting layer and employing MoO₃ as a charge-generation layer was investigated. It was found that the external efficiencies approximately scale with the number of white light emitting subpixels. IOt was observed that the forward viewing and total power efficiencies were relatively independent of the number of elements in the stack. The results show that the use of both electron- and hole-blocking layers, combined with a MoO₃/Li-doped Bphen charge-generation layer, ensures a uniform white color balance for each subpixel in the stack, along with very high efficiency for charge injection.