Efficiency improvement of flexible fluorescent and phosphorescent organic light emitting diodes by inserting a spin-coating buffer layer

Luminescence degradation in phosphorescent organic light-emitting devices by hole space charges

“…9 We note that the observed stability is similar to that reported by some groups for the same device structure 14,15 but lower in comparison to other reports. 9 We note that the observed stability is similar to that reported by some groups for the same device structure 14,15 but lower in comparison to other reports.…”

Study on the Rubrene Emission Sensitized by a Phosphorescent Ir Compound in the Host of CBP

“…Actually, even the sensitizer Ir(ppy) 3 is adopted in the fabrication of the OLEDs, the efficiency is dependent on the device structure. In designing the device, the triplet-triplet annihilation should be decreased, so the concentration and the position of the guest should be optimized [9,10].…”

Optimum Structure Adjustment for Flexible Fluorescent and Phosphorescent Organic Light Emitting Diodes

“…The device characteristics with double HTLs were also found better than those with the single HTL spin-coated structure (NPB:α-NPD)+THF only (Device G4). Because spin-coating the film in the amorphous mode on the ITO surface does not easily generate pin holes, and the organic layer contact with the ITO becomes tighter, the HTL surface roughness can be greatly improved [18][19][20][21]. Therefore, the holes are injected more easily from the ITO electrode into the NPB layer.…”