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In this paper, we study the effect of the structure and molecular weight of polyethylenimine (PEI) on doping efficiency of n-type organic semiconductors based on poly[[N, N 9-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,59-(2,29-bithiophene)] (P(NDI2OD-T2)). Linear and branched PEI with low (Mw = 2 and 3 kDa) and high molecular weights (Mw = 25 kDa) are used. It is found...
Interdependence of chemical structure, thin‐film morphology, and transport properties is a key, yet often elusive aspect characterizing the design and development of high‐mobility, solution‐processed polymers for large‐area and flexible electronics applications. There is a specific need to achieve >1 cm2 V−1 s−1 field‐effect mobilities (μ) at low processing temperatures in combination with environmental...
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