Ultra-simple hybrid white organic light-emitting diodes with high efficiency and CRI trade-off: Fabrication and emission-mechanism analysis

► Highly efficient hybrid white organic light-emitting diode was proposed. ► The simple device consists of a hole-transporting layer and an emitting layer. ► The maximum power efficiency of 46.8 lm W−1 with CRI up to 90 was achieved. ► This concept offers a low-cost fabrication process for hybrid white device.