Electron transport properties of an ethanol-soluble AlQ₃-based coordination polymer and its applications in OLED devices

The electronic states (HOMO/LUMO energy levels) and the electron transport characteristics of a novel AlQ₃-based coordination polymer recently designed and synthesized are explored by means of cyclic voltammetry and space-charge-limited current measurements. This coordination polymer has high electron mobility, low HOMO/LUMO energy levels, high thermal stability and high solubility in ethanol and therefore can be fabricated into films by a solution process, e.g. spin coating without influencing commonly used emitter layer materials on which the electron transport layer polymer is to be deposited. All these properties and features suggest that this new coordination polymer is a very promising candidate as a high performance and low cost electron transport layer material in the application of organic light-emitting diodes.