White emitter systems are studied in OLED using doped charge transport layers. Mature fluorescent white diodes combining high efficiency with lifetimes exceeding 10,000h at a brightness of 1000 cd/m2 are reported. Stacked devices for applications requiring a high color rendering index perform at a current efficiency of 80 cd/A and power efficiency of 23 lm/W at 1000 cd/m2 with the lifetime exceeding 10,000h at 1000 cd/m2. Efforts towards top‐emission white OLED and white OLED for passive matrix applications yield promising results.
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