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Charge Mobility and Charge Traps in Conjugated Polymers
Author(s) -
Liu ChingYang,
Chen ShowAn
Publication year - 2007
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200700327
Subject(s) - charge (physics) , polymer , chemical physics , conjugated system , materials science , side chain , electron mobility , ionization , impurity , charge carrier , semiconductor , organic semiconductor , partial charge , chemistry , optoelectronics , organic chemistry , physics , composite material , ion , quantum mechanics
Charge mobility and charge traps are two important factors that affect performances of semiconductor devices. Here, the measurement techniques and correlation with polymer structures is reviewed. Common traps, such as oxygen, aggregates, long conjugation length subchains, and impurities are found to appear in conjugated polymers and their features are described. Charge mobility is highly sensitive to polymer morphology and chain alignment. Incorporating transport moieties on side chains can either enhance or reduce charge mobilities depending on their ionization potentials. The relationship between charge transport behaviors and chemical structures are also discussed.