Electroluminescence from an Electrochemical Cell

One idea to realize a pin junction with conjugated polymers is to create it in situ by electrochemical doping. By using the conjugated polymer in a solid state electrochemical cell, the production of bipolar light-emitting pin junction devices can be realized [69, 70]. 

The active layer consists of a polymer having electronic conductive, ionic conductive, and luminescent properties, is blended with an ionic salt [48]. The polymer with the required properties can be realized by a blend of a conjugated and an ionic conductive polymer [48] or by specially designed polymers [71-73]. 

The arrangement of the LECs offer some advantages compared to the PLEDs in an MSM or MIM arrangement [48]  

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