Figure 8 | Scientific Reports

Figure 8

From: Highly efficient single-stack hybrid cool white OLED utilizing blue thermally activated delayed fluorescent and yellow phosphorescent emitters

Figure 8

(a) Energy level diagram with detail device structure of single-stack hybrid WOLEDs. Wherein, the thin yellow EML has three positions with different distance (x: 5, 8, and 11 nm) from HTL. (b) EQE-luminance curves of DBFPO and (e) DPEPO based white devices with different x value. Inset: Schematic diagram shows recombination zone in the blue-yellow-blue multiple EML system of respective white devices. J-V-L curves and normalized EL spectra of DBFPO (c,d), and DPEPO (f,g) comprised white devices.

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