Organic magnetoresistance based on hopping theory

被引：6

作者：

Yang Fu-Jiang ^{[1
]}

Xie Shi-Jie ^{[1
]}

机构：

[1] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

来源：

CHINESE PHYSICS B | 2014年 / 23卷 / 09期

基金：

中国国家自然科学基金;

关键词：

hopping; organic magnetoresistance; master equation; hyperfine interaction; LIGHT-EMITTING-DIODES; ROOM-TEMPERATURE; CONJUGATED POLYMER; SEMICONDUCTORS; MOBILITY; DEVICES; FIELD;

D O I：

10.1088/1674-1056/23/9/097306

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

For the organic magnetoresistance (OMAR) effect, we suggest a spin-related hopping of carriers (polarons) based on Marcus theory. The mobility of polarons is calculated with the master equation (ME) and then the magnetoresistance (MR) is obtained. The theoretical results are consistent with the experimental observation. Especially, the sign inversion of the MR under different driving bias voltages found in the experiment is predicted. Besides, the effects of molecule disorder, hyperfine interaction (HFI), polaron localization, and temperature on the MR are investigated.

引用

页数：5

共 33 条

[1] Inversion of magnetoresistance in organic semiconductors [J].

Bergeson, J. D. ;

Prigodin, V. N. ;

Lincoln, D. M. ;

Epstein, A. J. .

PHYSICAL REVIEW LETTERS, 2008, 100 (06)

[2] Electric-field and temperature dependence of the hole mobility in poly(p-phenylene vinylene) [J].

Blom, PWM ;

deJong, MJM ;

vanMunster, MG .

PHYSICAL REVIEW B, 1997, 55 (02) :R656-R659

[3] Separating positive and negative magnetoresistance in organic semiconductor devices [J].

Bloom, F. L. ;

Wagemans, W. ;

Kemerink, M. ;

Koopmans, B. .

PHYSICAL REVIEW LETTERS, 2007, 99 (25)

[4] Bipolaron mechanism for organic magnetoresistance [J].

Bobbert, P. A. ;

Nguyen, T. D. ;

van Oost, F. W. A. ;

Koopmans, B. ;

Wohlgenannt, M. .

PHYSICAL REVIEW LETTERS, 2007, 99 (21)

[5] The basis of organic spintronics: Fabrication of organic spin valves [J].

Chen Bin-Bin ;

Jiang Sheng-Wei ;

Ding Hai-Feng ;

Jiang Zheng-Sheng ;

Wu Di .

CHINESE PHYSICS B, 2014, 23 (01)

[6] Large magnetic field effects in organic light emitting diodes based on tris(8-hydroxyquinoline aluminum) (Alq3)/IN,N′-Di(naphthalen-1-yl)-N,N′ diphenyl-benzidine (NPB) bilayers [J].

Davis, AH ;

Bussmann, K .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 2004, 22 (04) :1885-1891

[7] Room temperature spin polarized injection in organic semiconductor [J].

Dediu, V ;

Murgia, M ;

Matacotta, FC ;

Taliani, C ;

Barbanera, S .

SOLID STATE COMMUNICATIONS, 2002, 122 (3-4) :181-184

[8] The role of magnetic fields on the transport and efficiency of aluminum tris(8-hydroxyquinoline) based organic light emitting diodes [J].

Desai, P. ;

Shakya, P. ;

Kreouzis, T. ;

Gillin, W. P. .

JOURNAL OF APPLIED PHYSICS, 2007, 102 (07)

[9] Magnetoresistance and efficiency measurements of Alq3-based OLEDs [J].

Desai, Pratik ;

Shakya, P. ;

Kreouzis, T. ;

Gillin, W. P. ;

Morley, N. A. ;

Gibbs, M. R. J. .

PHYSICAL REVIEW B, 2007, 75 (09)

[10] Magnetic field effects on the electroluminescence of organic light emitting devices: A tool to indicate the carrier mobility [J].

Ding, B. F. ;

Yao, Y. ;

Sun, Z. Y. ;

Wu, C. Q. ;

Gao, X. D. ;

Wang, Z. J. ;

Ding, X. M. ;

Choy, W. C. H. ;

Hou, X. Y. .

APPLIED PHYSICS LETTERS, 2010, 97 (16)

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