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Micro‐contact printing of poly(3‐hexylthiophene) as a tool to improve orientation and ordering of the P3HT layer
Author(s) -
Scavia G.,
Porzio W.,
Destri S.
Publication year - 2011
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201000589
Subject(s) - crystallinity , annealing (glass) , materials science , layer (electronics) , microcontact printing , polymer , active layer , substrate (aquarium) , chemical engineering , composite material , nanotechnology , oceanography , geology , engineering , thin film transistor
The effect of the stamp stretching during micro‐contact printing (μCP) onto the corresponding printed poly(3‐hexylthiophene) (P3HT) layer has been analysed both from morphological (AFM) and structural (XRD) points of view. Results show an orienting effect of the stretching towards the P3HT ultimate morphological units (i.e. fibrils) along with the stretching direction. Other μCP parameters leading to an overall P3HT crystallinity improvement such as μCP mechanical pressure extent, substrate polarity, and post‐annealing treatments are shown. Finally, preliminary results of μCP of double polymer layers (DL) of P3HT/PCBM, used as active layer in organic photovoltaic cells, are presented. μCP guarantees that each layer within the DL essentially maintains the morphological and structural features typical of the corresponding starting layer. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)