| 摘要 |
<p>There is provided an organic light emitting diode having an anode, a hole transport layer contianing a material having an ionization potential IPHTL, an emissive layer, an electron transport layer, and a cathode. The emissive layer contains: (a) a fluorinated hexacoordinate iridium complex emitter having an ionization potential IPemt; (b) an electron transport host material having an ionization potential IPHO; and (c) a recombination zone shifting additive having an ionization potential IPx. The weight ratio of host to zone shifting additive is at least 4 and the following energy relationships exist: (i) (IPHTL - IPemt ) = -0.1 eV; (ii) IPHO > IPHTL; and (iii) IPx = IPHTL.</p> |
