Trap free space charge limited conduction and high mobility in cobalt phthalocyanine - iron phthalocyanine composite thin films

被引：5

作者：

Kumar, Arvind ^{[1
]}

Singh, Ajay ^{[1
]}

Samanta, S. ^{[1
]}

Prasad, R. ^{[1
]}

Debnath, A. K. ^{[1
]}

Aswal, D. K. ^{[1
]}

Gupta, S. K. ^{[1
]}

机构：

[1] Bhabha Atom Res Ctr, Tech Phys Div, Bombay 400085, Maharashtra, India

来源：

ADVANCES IN MATERIALS SCIENCE AND TECHNOLOGY (AMST) | 2014年 / 209卷

关键词：

Phthalocyanine; Space charge limited current; thin films; GROWTH;

D O I：

10.4028/www.scientific.net/SSP.209.52

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Charge transport of pure and composite thin films (20 nm thickness) of cobalt phthalocyanine (CoPc) and iron phthalocyanine (FePc) grown by molecular beam epitaxy has been investigated in the temperature range of 300 K-25 K. Composite films with optimum composition showed very high mobility of 110 cm(2)V(-1)s(-1) at room temperature. X-ray diffraction and UV-Vis studies showed that the films were well oriented with planar co-facial structure. The current density-voltage (J-V) characteristics of composite films showed trap free space charge limited conduction (SCLC) while individual phthalocyanine films showed SCLC with exponential distribution of traps. Several factors such as effect of substrate, very small thickness and effect of mixing two phthalocyanines are responsible for the very high mobility observed in present study.

引用

页码：52 / 56

页数：5

共 9 条

[1] Parts-per-billion level chlorine sensors with fast kinetics using ultrathin cobalt phthalocyanine films [J].

Debnath, A. K. ;

Samanta, S. ;

Singh, Ajay ;

Aswal, D. K. ;

Gupta, S. K. ;

Yakhmi, J. V. .

CHEMICAL PHYSICS LETTERS, 2009, 480 (4-6) :185-188

[2]

Goud R. D., 1986, J PHYS D, V9, P1785

[3] Structure and electrical conduction properties of phthalocyanine thin films [J].

Gould, RD .

COORDINATION CHEMISTRY REVIEWS, 1996, 156 :237-274

[4] Schottky energy barrier and charge injection in metal/copper-phthalocyanine/metal structures [J].

Mahapatro, AK ;

Ghosh, S .

APPLIED PHYSICS LETTERS, 2002, 80 (25) :4840-4842

[5] Ordered growth of substituted phthalocyanine thin films: Hexadecafluorophthalocyaninatozinc on alkali halide (100) and microstructured Si surfaces [J].

Schlettwein, D ;

Hesse, K ;

Tada, H ;

Mashiko, S ;

Storm, U ;

Binder, J .

CHEMISTRY OF MATERIALS, 2000, 12 (04) :989-995

[6] Charge transport in polypyrrole:ZnO-nanowires composite films [J].

Singh, A. ;

Joshi, Aditee ;

Samanta, S. ;

Debnath, A. K. ;

Aswal, D. K. ;

Gupta, S. K. ;

Yakhmi, J. V. .

APPLIED PHYSICS LETTERS, 2009, 95 (20)

[7] Role of structural disorder in charge transport properties of cobalt phthalocyanine thin films grown by molecular-beam epitaxy [J].

Singh, Ajay ;

Samanta, Soumen ;

Kumar, Arvind ;

Debnath, A. K. ;

Aswal, D. K. ;

Gupta, S. K. ;

Yakhmi, J. V. ;

Hayakawa, Y. ;

Deshpande, S. K. .

ORGANIC ELECTRONICS, 2010, 11 (11) :1835-1843

[8] Orderly growth of copper phthalocyanine on highly oriented pyrolytic graphite (HOPG) at high substrate temperatures [J].

Wang, SD ;

Dong, X ;

Lee, CS ;

Lee, ST .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (05) :1529-1532

[9] Phthalocyanine composites as high-mobility semiconductors for organic thin-film transistors [J].

Zhang, J ;

Wang, H ;

Yan, XJ ;

Wang, J ;

Shi, JW ;

Yan, DH .

ADVANCED MATERIALS, 2005, 17 (09) :1191-+

← 1 →