The Role of OTS Density on Pentacene and C60 Nucleation, Thin Film Growth, and Transistor Performance

被引：223

作者：

Virkar, Ajay ^{[1
]}

Mannsfeld, Stefan ^{[1
]}

Oh, Joon Hak ^{[1
]}

Toney, Michael F. ^{[2
]}

Tan, Yih Horng ^{[3
]}

Liu, Gang-yu ^{[3
]}

Scott, J. Campbell ^{[4
]}

Miller, Robert ^{[4
]}

Bao, Zhenan ^{[1
]}

机构：

[1] Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA

[2] Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA

[3] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA

[4] IBM Almaden Res Ctr, San Jose, CA 95120 USA

来源：

ADVANCED FUNCTIONAL MATERIALS | 2009年 / 19卷 / 12期

关键词：

SELF-ASSEMBLED MONOLAYERS; ORGANIC SEMICONDUCTORS; MOBILITY; CRYSTAL; MORPHOLOGY; MOLECULES;

D O I：

10.1002/adfm.200801727

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In organic thin film transistors (OTFTs), charge transport occurs in the first few monolayers of the semiconductor near the semiconductor/dielectric interface. Previous work has investigated the roles of dielectric surface energy, roughness, and chemical functionality on performance. However, large discrepancies in performance, even with apparently identical surface treatments, indicate that additional surface parameters must be identified and controlled in order to optimize OTETs. Here, a crystalline, dense octadecylsilane (OTS) surface modification layer is found that promotes two-dimensional semiconductor growth. Higher mobility is consistently achieved for films deposited on crystalline OTS compared to on disordered OTS, with mobilities as high as 5.3 and 2.3 cm(2)V(-1) s(-1) for C-60 and pentacene, respectively. This is a significant step toward morphological control of organic semiconductors which is directly linked to their thin film carrier transport.

引用

页码：1962 / 1970

页数：9

共 40 条

[1] Control of crystal nucleation by patterned self-assembled monolayers [J].

Aizenberg, J ;

Black, AJ ;

Whitesides, GM .

NATURE, 1999, 398 (6727) :495-498

[2]

Anthopoulos T.D., 2006, APPL PHYS LETT, P89

[3]

Bao Z., 2007, Organic Field Transistors

[4] Short channel effects in regioregular poly(thiophene) thin film transistors [J].

Chabinyc, ML ;

Lu, JP ;

Street, RA ;

Wu, YL ;

Liu, P ;

Ong, BS .

JOURNAL OF APPLIED PHYSICS, 2004, 96 (04) :2063-2070

[5]

Dimitrakopoulos CD, 2002, ADV MATER, V14, P99, DOI 10.1002/1521-4095(20020116)14:2<99::AID-ADMA99>3.0.CO

[6]

2-9

[7] Spatially correlated charge transport in organic thin film transistors [J].

Dinelli, F ;

Murgia, M ;

Levy, P ;

Cavallini, M ;

Biscarini, F ;

de Leeuw, DM .

PHYSICAL REVIEW LETTERS, 2004, 92 (11) :116802-1

[8] Effect of close packing of octadecyltriethoxysilane molecules on monolayer morphology at the air/water interface [J].

Francis, Raju ;

Louche, Guillaume ;

Duran, Randolph S. .

THIN SOLID FILMS, 2006, 513 (1-2) :347-355

[9] Using droplets of nematic liquid crystal to probe the microscopic and mesoscopic structure of organic surfaces [J].

Gupta, VK ;

Abbott, NL .

LANGMUIR, 1999, 15 (21) :7213-7223

[10] Growth dynamics of pentacene thin films [J].

Heringdorf, FJMZ ;

Reuter, MC ;

Tromp, RM .

NATURE, 2001, 412 (6846) :517-520

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