Light-emitting electrochemical cells, LEC, is a newly invented lighting technology.
In his thesis, physicist Amir Asadpoordarvish, Umeå University in Sweden, shows how a LEC can be produced through spraying three layers of ink on a substrate and emit light by the current from an ordinary battery.
LEC components can be sprayed onto complicated surfaces, for example to make a light-emitting fork.
(a) A light-emitting fork, as realized by spray-sintering a stainless-steel fork with an active layer and a top cathode. (b) A light-emitting glass vial fabricated by an anode comprising Ag-NW/ZnO, an active layer and a top cathode layer spray-deposited on its outer surface. Link.