| abstract |
The invention discloses an alcohol soluble cathode buffer layer molecular material containing triaryl phosphonium oxygen and nitrogen heterocyclic functional groups as well as a synthetic method and application thereof. The cathode buffer layer molecular material is easy to synthesize and prepare (for example: vacuum sublimation is not needed for purification), has better alcohol solubility and film morphological stability, and then shows good solution processability. Phosphonium oxygen and nitrogen heterocyclic functional groups capable of absorbing electrons are led into the material and can effectively assist the injection/transmission or collection of the electrons from metals or metal oxide electrodes including aluminum (Al), silver (Ag), gold (Au), ITO and the like, so that a low-work-function metal electrode which is instable in the air is not used, and the stability of a device can be promoted. Moreover, the alcohol soluble cathode buffer layer molecular material can react with lithium ions, potassium ions, cesium ions, calcium ions and the like, so that the cathode buffer layer molecular material can be doped with inorganic salts or organic salts containing the ions to form a doped or composite cathode buffer layer so as to improve the performance of the device. |