In synthesis process of polymers like polythiophene , polypyrrole, polyanniline etc the term p-doping and n-doping observed. what it means?
I have not been in this field for many years so there are probably more appropriate expert answers with references, but I can summarise.
doping in polymers is achieved by charge transfer between a dopant and the polymer backbone, leaving a localised positive (p) or negative (n) charge on the polymer. Because of the strong electron vibrational coupling in these systems, the local bond alternation structure is distorted, resulting in intergap states, which were termed polarons or bipolarons, which have a degree of delocalisation along the chain, and mobility in an external field.
Required charge carriers may be provided by the process oxidation(p-doping) or reduction (n-doping) to the polymer chain.
Hello Vishal, You could follow the following link and maybe directly contact the contributors of this thread.
This is an interesting question to me as well.
https://www.researchgate.net/post/Can_we_dope_a_conducting_polymer_to_tailor_it_from_p-type_to_n-type_and_vice_versa
Good Luck...
Actually there are two type of doping in polymer i-e p doping (removal of electron) and n-doping (addition of electrons). Removal of electrons make spaces which make it easier for the electron to move and conduct current, while addition of electrons involves higher energy orbital in current conduction.
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