| abstract |
The invention discloses a functionalized cathode, a QLED and a preparation method thereof, a light-emitting module and a display device. The method comprises the steps of: first depositing a layer of mercaptosilane on the electron transport layer; then depositing a layer of cathode on the mercaptosilane layer to obtain a functionalized cathode. In the present invention, a layer of mercaptosilane is modified between the electron transport layer and the metal electrode, and the silicon-oxygen bond in the mercaptosilane can connect with the electron transport layer, and passivate the surface defect of the electron transport layer, while the mercapto group exposed at the other end can interact with the electron transport layer. The metal electrodes are closely connected by covalent bonds. On the one hand, they can serve as the dense nucleation centers of the metal during the metal electrode deposition process, and gradually grow uniform and regular metal electrodes. On the other hand, they can promote the electron transport layer and the metal electrode. Close connection, maintain interface stability and interface properties, prevent metal electrodes from permeating, corroding, oxidizing or falling off in the electronic layer, effectively improving electron injection efficiency and the life and stability of QLED devices. |