P‐182: Long‐Life Green Phosphorescent OLED with Light‐Emitting Layer Formed by Two‐Source Evaporation Using Host Material with Novel Hetero Fused Ring

Abstract

We developed an electron-transport (ET) host material with a novel hetero fused ring which prolongs the lifetime of green phosphorescent organic light-emitting diodes (OLEDs). We also developed a premixed host containing the ET host and a holetransport host. The use of the premixed host can facilitate production of the OLEDs.

23‐1: Invited Paper: Single and Tandem OLED Display Technologies with High Efficiency and Long Lifetime

“…In contrast, the lifetime for the green OLED device was only 1.3 times increased compared with the previous green OLED device by suppressing the initial luminance drop (Figure 6(b)). We estimate that the carrier injection rate to the EML would not be affected so well from the carrier transport layers [13]. Since the ratio of the lifetimes for the three color OLED devices was shifted, we need to optimize the aperture ratio of each color for the SBS OLED display.…”

N‑Heterocyclic Carbene Based Pt(II) Complexes with d‐p Transition for Highly Performable Green Phosphorescent Electroluminescence

“…Over the past decades, extensive investigation on the green emitters focus on the metal complexation with 2-phenylpyridine (ppy) motifs since the superb properties of the green complex Ir(ppy) 3 , [15][16][17][18] of which the core is still irreplaceable used in the mass OLED panel fabrication. [19] Compared with limited variants of bidentate ligands for both Ir(III) and Pt(II) emitters, [20,5] tetradentate ligands for Pt(II) complexes are benefited with more options to modify the cyclometallated core structure. [21][22][23] The exploration of the Pt(II) complexes with tetradentate ligands is expanded in recent years, providing with a great many interesting characters, such as high efficiency, [24] narrow-spectrum emission, [25] etc.…”