Molecular Packing of High-Mobility Diketo Pyrrolo-Pyrrole Polymer Semiconductors with Branched Alkyl Side Chains

被引：381

作者：

Zhang, Xinran ^{[1
]}

Richter, Lee J. ^{[2
]}

DeLongchamp, Dean M. ^{[1
]}

Kline, R. Joseph ^{[1
]}

Hammond, Matthew R. ^{[1
]}

McCulloch, Iain ^{[4
,5
]}

Heeney, Martin ^{[4
,5
]}

Ashraf, Raja S. ^{[4
,5
]}

Smith, Jeremy N. ^{[5
,6
]}

Anthopoulos, Thomas D. ^{[5
,6
]}

Schroeder, Bob ^{[7
]}

Geerts, Yves H. ^{[7
]}

Fischer, Daniel A. ^{[3
]}

Toney, Michael F. ^{[8
]}

机构：

[1] NIST, Div Polymers, Gaithersburg, MD 20899 USA

[2] NIST, Surface & Microanal Sci Div, Gaithersburg, MD 20899 USA

[3] NIST, Div Ceram, Gaithersburg, MD 20899 USA

[4] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England

[5] Univ London Imperial Coll Sci Technol & Med, Ctr Plast Elect, London SW7 2AZ, England

[6] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England

[7] Univ Libre Bruxelles, Fac Sci, Lab Chim Polymeres, B-1050 Brussels, Belgium

[8] Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 38期

关键词：

FIELD-EFFECT TRANSISTORS; THIN-FILM TRANSISTORS; HIGH-PERFORMANCE; CHARGE-TRANSPORT; CARRIER MOBILITY; COPOLYMERS; POLY(3-ALKYLTHIOPHENES); MORPHOLOGY; TEXTURE; ORDER;

D O I：

10.1021/ja204515s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We describe a series of highly soluble diketo pyrrolo-pyrrole (DPP)-bithiophene copolymers exhibiting field effect hole mobilities up to 0.74 cm(2) V(-1) s(-1), with a common synthetic motif of bulky 2-octyldodecyl side groups on the conjugated backbone. Spectroscopy, diffraction, and microscopy measurements reveal a transition in molecular packing behavior from a preferentially edge-on orientation of the conjugated plane to a preferentially face-on orientation as the attachment density of the side chains increases. Thermal annealing generally reduces both the face-on population and the misoriented edge-on domains. The highest hole mobilities of this series were obtained from edge-on molecular packing and in-plane liquid-crystalline texture, but films with a bimodal orientation distribution and no discernible in-plane texture exhibited surprisingly comparable mobilities. The high hole mobility may therefore arise from the molecular packing feature common to the entire polymer series: backbones that are strictly oriented parallel to the substrate plane and coplanar with other backbones in the same layer.

引用

页码：15073 / 15084

页数：12

共 53 条

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