The energy released when an electron is added to an atom. If the electron affinity is negative, then energy is required to attach an electron to the atom.
Eectron Block Layer
This layer confines electrons to the emitting layer.
Electron Injection Layer
An electron injection layer facilitates electron injection from the cathode to the organic layer.
Electro-Luminescence is the process of light emission under electrical excitation.
In the emitting layer electrons and holes recombine under light emission.
Electron Transport Layer
This layer transports the electrons to the emitting layer.