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Polymers 2011, 3(3), 1051-1064; doi:10.3390/polym3031051

Synthesis of Diblock Copolymer Consisting of Poly(4-butyltriphenylamine) and Morphological Control in Photovoltaic Application

Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Nakacho, Koganei-shi, Tokyo 184-8588, Japan
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Received: 23 May 2011 / Revised: 8 June 2011 / Accepted: 28 June 2011 / Published: 1 July 2011
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Abstract

The diblock copolymer PTPA-b-PS consisting of poly(4-butyltripheneylamine) (PTPA) and polystyrene was prepared by atom transfer radical polymerization followed by C–N coupling polymerization. Three types of block copolymers with different contents of polystyrene segment were prepared. The formation of block copolymer was confirmed by 1H NMR spectra and gel permeation chromatography (GPC) profiles. Time of flight (TOF) measurement revealed that the block copolymer showed higher hole mobility up to 1.3 × 10−4 cm2/Vs compared with PTPA homopolymer. The surface morphology of block copolymer films blended with [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) was investigated by Atomic force microscopy (AFM). Introduction of polystyrene segment provided microphase-separated structures with domain sizes of around 20 nm. The photovoltaic device based on PTPA-b-PS, PTPA, and PCBM exhibited higher efficiency than that of homopolymer blend system.
Keywords: poly(triphenylamine); block copolymer; morphology; hole mobility; photovoltaic cell poly(triphenylamine); block copolymer; morphology; hole mobility; photovoltaic cell
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Tsuchiya, K.; Kikuchi, T.; Songeun, M.; Shimomura, T.; Ogino, K. Synthesis of Diblock Copolymer Consisting of Poly(4-butyltriphenylamine) and Morphological Control in Photovoltaic Application. Polymers 2011, 3, 1051-1064.

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