Solid state lighting LECs

It is well known that solid-state LECs exhibit a significant response time since electroluminescence can only occur after the ionic double-layers have been built up at the electrode interfaces [79,82]. Since in this case only the PFg anion is mobile, the double-layers are formed by accumulation and depletion of PFg at the anode and cathode, respectively. The LEC device with 45 started to emit blue-green light at a bias of 5 V after several minutes. The electroluminescence spectrum, as shown in Fig. 36 (trace a), is very similar to the photoluminescence spectrum recorded for a spin-coated film on glass and of a solution of the complex. For comparison, the electroluminescence... 

Solid-state LECs are broadly divided into two categories such as polymer-based LECs and ionic transition metal complex (iTMQ-based LECs. In particular, iTMC-based LECs have been stimulating much attention for device application [13]. On the other hand, solution state and gel state LECs have been also studied toward a practical use for light-emitting devices. The application of alternating current (AC) to LECs is one of the techniques to improve the device properties... 

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