Polymeric FET and LED

Since the discovery of doped polyacetylene, a range of polymeric semiconductor devices has been studied, including normal transistors, field-effect transistors (FETs) photodiodes, and light-emitting diodes (LEDs). Like conductive polymers, these materials obtain their properties from their electronic nature, specifically the presence of conjugated -bonding systems. 

A fundamentally important implication disclosed by these studies is that termination does exist in LRP, and the value of fet in LRP is just the same as that in the conventional RP. For some time after the discovery of LRP, the excellent performance of LRP in controlling polymer structure had led a few people to the idea of its being a termination-free polymerization. Even now some people seem to believe so. The fact is that there has been reported no theoretical or experimental evidence to support this. All experiments on NMP and other branches of LRP show that fet is no different between LRP and conventional RP (see also below). 

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