Dispersive hole transport in polymer: carbon nanotube composites

被引：7

作者：

Inigo, A. R. ^{[1
]}

Henley, S. J. ^{[1
]}

Silva, S. R. P. ^{[1
]}

机构：

[1] Univ Surrey, Adv Technol Inst, Nanoelect Ctr, Guildford GU2 7XH, Surrey, England

来源：

NANOTECHNOLOGY | 2011年 / 22卷 / 26期

关键词：

ELECTRIC-FIELD DEPENDENCE; CHARGE-TRANSPORT; DRIFT MOBILITY; MORPHOLOGY; FILMS; CELLS;

D O I：

10.1088/0957-4484/22/26/265711

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The hole transport properties of poly(2-methoxy, 5-(2'-ethyl-hexoxy)-p-phenylene vinylene) (MEH-PPV) blended with acid oxidized multiwall carbon nanotubes (COOH-MWCNTs) were investigated in a diode configuration using the time-of-flight (TOF) photocurrent method. While the room temperature hole mobility in pure MEH-PPV films was non-dispersive with positive field dependent mobility, MEH-PPV: COOH-MWCNT blended devices exhibited dispersive transport and negative field dependent mobility. This indicates that the hole mobility in this composite is influenced by positional disorder caused by the presence of COOH-MWCNTs in the MEH-PPV matrix. These results strongly suggest that the distribution of COOH-MWCNTs optimising in the organic matrix is important for charge transport in the high mobility nanotube component to be activated, when used in hybrid material systems.

引用

页数：6

共 27 条

[1]

[Anonymous], NATURE

[2] CHARGE TRANSPORT IN DISORDERED ORGANIC PHOTOCONDUCTORS - A MONTE-CARLO SIMULATION STUDY [J].

BASSLER, H .

PHYSICA STATUS SOLIDI B-BASIC RESEARCH, 1993, 175 (01) :15-56

[3] Tuning the work function of surface oxidised multi-wall carbon nanotubes via cation exchange [J].

Blanchard, N. P. ;

Hatton, R. A. ;

Silva, S. R. P. .

CHEMICAL PHYSICS LETTERS, 2007, 434 (1-3) :92-95

[4] Carbon nanotubes-semiconductor networks for organic electronics: The pickup stick transistor [J].

Bo, XZ ;

Lee, CY ;

Strano, MS ;

Goldfinger, M ;

Nuckolls, C ;

Blanchet, GB .

APPLIED PHYSICS LETTERS, 2005, 86 (18) :1-3

[5] Recent Advances in Research on Carbon Nanotube-Polymer Composites [J].

Byrne, Michele T. ;

Gun'ko, Yurii K. .

ADVANCED MATERIALS, 2010, 22 (15) :1672-1688

[6] EXPLANATION FOR THE ROOT-E-DEPENDENT MOBILITIES OF CHARGE-TRANSPORT IN MOLECULARLY DOPED POLYMERS [J].

DUNLAP, DH .

PHYSICAL REVIEW B, 1995, 52 (02) :939-954

[7] Charge carrier transport in poly(p-phenylenevinylene) light-emitting devices [J].

Forero, S ;

Nguyen, PH ;

Brütting, W ;

Schwoerer, M .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1999, 1 (08) :1769-1776

[8] Electroluminescence in conjugated polymers [J].

Friend, RH ;

Gymer, RW ;

Holmes, AB ;

Burroughes, JH ;

Marks, RN ;

Taliani, C ;

Bradley, DDC ;

Dos Santos, DA ;

Brédas, JL ;

Lögdlund, M ;

Salaneck, WR .

NATURE, 1999, 397 (6715) :121-128

[9] Oxidised carbon nanotubes as solution processable, high work function hole-extraction layers for organic solar cells [J].

Hatton, Ross A. ;

Blanchard, N. P. ;

Tan, Li Wei ;

Latini, Gianluca ;

Cacialli, Franco ;

Silva, S. Ravi P. .

ORGANIC ELECTRONICS, 2009, 10 (03) :388-395

[10] Higher Dispersion Efficacy of Functionalized Carbon Nanotubes in Chemical and Biological Environments [J].

Heister, Elena ;

Lamprecht, Constanze ;

Neves, Vera ;

Tilmaciu, Carmen ;

Datas, Lucien ;

Flahaut, Emmanuel ;

Soula, Brigitte ;

Hinterdorfer, Peter ;

Coley, Helen M. ;

Silva, S. Ravi P. ;

McFadden, Johnjoe .

ACS NANO, 2010, 4 (05) :2615-2626

← 1 2 3 →