The Relationship between Nanoscale Architecture and Charge Transport in Conjugated Nanocrystals Bridged by Multichromophoric Polymers

被引：47

作者：

Dabirian, Reza ^{[1
]}

Palermo, Vincenzo ^{[1
]}

Liscio, Andrea ^{[1
]}

Schwartz, Erik ^{[2
]}

Otten, Matthijs B. J. ^{[2
]}

Finlayson, Chris E. ^{[3
]}

Treossi, Emanuele ^{[1
]}

Friend, Richard H. ^{[3
]}

Calestani, Gianluca ^{[4
]}

Muellen, Klaus ^{[5
]}

Nolte, Roeland J. M. ^{[2
]}

Rowan, Alan E. ^{[2
]}

Samori, Paolo ^{[1
,6
,7
]}

机构：

[1] CNR, Inst Sintesi Organ & Fotoreativita, I-40129 Bologna, Italy

[2] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 ED Nijmegen, Netherlands

[3] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[4] Univ Parma, Dipartimento Chim Gen & Inorgan, I-43100 Parma, Italy

[5] Max Planck Inst Polymer Res, D-55124 Mainz, Germany

[6] Univ Strasbourg, Nanochem Lab ISIS, F-67000 Strasbourg, France

[7] CNRS, UMR 7006, F-67000 Strasbourg, France

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2009年 / 131卷 / 20期

基金：

英国工程与自然科学研究理事会;

关键词：

FIELD-EFFECT TRANSISTORS; PROBE FORCE MICROSCOPY; THIN-FILM TRANSISTORS; SELF-ASSEMBLED MONOLAYERS; ORGANIC SOLAR-CELLS; PERYLENE DIIMIDES; HIGH-PERFORMANCE; SMALL MOLECULES; MORPHOLOGY; OLIGOMERS;

D O I：

10.1021/ja809731e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report on the self-assembly and the electrical characterization of bicomponent films consisting of an organic semiconducting small molecule blended with a rigid polymeric scaffold functionalized in the side chains with monomeric units of the same molecule. The molecule and polymer are a perylene-bis(dicarboximide) monomer (M-PDI) and a perylene-bis(dicarboximide)-functionalized poly(isocyanopeptide) (P-PDI), which have been codeposited on SiOx and mica substrates from solution. These bicomponent films have been characterized by atomic force microscopy (AFM) and Kelvin probe force microscopy (KPFM), revealing the relationship between architecture and function for various supramolecular nanocrystalline arrangements at a nanometer spatial resolution. Monomer-polymer interactions can be controlled by varying solvent and/or substrate polarity, so that either the monomer packing dictates the polymer morphology or vice versa, leading to a morphology exhibiting M-PDI nanocrystals connected with each other by P-PDI polymer wires. Compared to pure M-PDI or P-PDI films, those bicomponent films that possess polymer interconnections between crystallites of the monomer display a significant improvement in electrical connectivity and a 2 orders of magnitude increase in charge carrier mobility within the film, as measured in thin film transistor (TFT) devices. Of a more fundamental interest, our technique allows the bridging of semiconducting crystals, without the formation of injection barriers at the connection points.

引用

页码：7055 / 7063

页数：9

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