The density of states in thin film copper phthalocyanine measured by Kelvin probe force microscopy

被引：39

作者：

Celebi, K. ^{[1
]}

Jadhav, P. J. ^{[2
]}

Milaninia, K. M. ^{[3
]}

Bora, M. ^{[1
]}

Baldo, M. A. ^{[2
]}

机构：

[1] MIT, Dept Phys, Cambridge, MA 02139 USA

[2] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

[3] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 08期

关键词：

D O I：

10.1063/1.2976634

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The density of states (DOS) is an important factor in understanding charge transport in organic semiconductors. We use Kelvin probe force microscopy to find the DOS in thin films of copper phthalocyanine (CuPC). We find an exponential DOS with a characteristic energy of 0.11 eV over a 0.5 eV range of the highest occupied molecular orbital of CuPC. We also find that the technique is limited by charge trapping and hysteresis at low DOSs, and nonuniform potential profiles within the CuPC film at high DOSs. (c) 2008 American Institute of Physics.

引用

收藏

页数：3

相关论文

共 13 条

[1] Electronic structure of pristine CuPc: Experiment and calculations [J].

Aristov, V. Yu. ;

Molodtsova, O. V. ;

Maslyuk, V. ;

Vyalikh, D. V. ;

Zhilin, V. M. ;

Ossipyan, Yu. A. ;

Bredow, T. ;

Mertig, I. ;

Knupfer, M. .

APPLIED SURFACE SCIENCE, 2007, 254 (01) :20-25

[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] Field-effect transistors made from solution-processed organic semiconductors [J].

Brown, AR ;

Jarrett, CP ;

deLeeuw, DM ;

Matters, M .

SYNTHETIC METALS, 1997, 88 (01) :37-55

[4]

DATTA S, 2005, QUANTUM TRANSPORT AT, P44505

[5] Thickness dependence of mobility in CuPc thin film on amorphous SiO2 substrate [J].

Gao, J. ;

Xu, J. B. ;

Zhu, M. ;

Ke, N. ;

Ma, Dongge .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2007, 40 (18) :5666-5669

[6] Organic semiconductor interfaces: electronic structure and transport properties [J].

Hill, IG ;

Milliron, D ;

Schwartz, J ;

Kahn, A .

APPLIED SURFACE SCIENCE, 2000, 166 (1-4) :354-362

[7] Thermally stimulated photoluminescence in disordered organic materials -: art. no. 115205 [J].

Kadashchuk, A ;

Skryshevskii, Y ;

Vakhnin, A ;

Ostapenko, N ;

Arkhipov, VI ;

Emelianova, EV ;

Bässler, H .

PHYSICAL REVIEW B, 2001, 63 (11)

[8] Electric-field-dependent percolation model of charge-carrier mobility in amorphous organic semiconductors [J].

Limketkai, B. N. ;

Jadhav, P. ;

Baldo, M. A. .

PHYSICAL REVIEW B, 2007, 75 (11)

[9] Organic field-effect transistors with ultrathin modified gate insulator [J].

Majewski, LA ;

Grell, M .

SYNTHETIC METALS, 2005, 151 (02) :175-179

[10] Polymer thin-film transistors with chemically modified dielectric interfaces [J].

Salleo, A ;

Chabinyc, ML ;

Yang, MS ;

Street, RA .

APPLIED PHYSICS LETTERS, 2002, 81 (23) :4383-4385