The EL device 100 as described herein is repairable. More particularly the EL device 100 is self-repairable (i.e. self-healable) after deformation and/or mechanical strain and/or physical separation of the EL device 100. The EL device 100 can self-repair (i.e. selfheal) such that operation and function of the EL device 100 is restored following deformation and/or mechanical strain and/or physical separation. Each component of the EL device 100 is also able to self-repair. In particular the first electrode 110, the second electrode 120 and the electroluminescence layer 130 are self-repairable such that the mechanical properties and functionality are restored. The EL device 100 is particularly advantageous because it can self-repair even once the EL device 100 has been cut into multiple pieces.

The mechanical properties and physicochemical properties of the EL device 100 are restored following self-repair after damage e.g. cutting into two or more pieces. The mechanical properties and physicochemical properties of each of the components of the EL device (i.e. the first electrode 110, second electrode 120 and the electroluminescence layer 130) are restored after self-repair. The luminescent performance of the EL device 100 is substantially recovered after self-repair. The transparency of each electrode is recovered and the luminescence of the electroluminescence layer is also recovered as part of the self-repair. The EL device is advantageous because the device recovers its function due to the self-repair ability of the EL device.