Magnetoconductance responses in organic charge-transfer-complex molecules

被引：19

作者：

Lee, Tsung-Hsun ^{[1
,2
]}

Li, Jhen-Hao ^{[2
]}

Huang, Wei-Shun ^{[2
]}

Hu, Bin ^{[3
]}

Huang, J. C. A. ^{[1
]}

Guo, Tzung-Fang ^{[2
]}

Wen, Ten-Chin ^{[4
]}

机构：

[1] Natl Cheng Kung Univ, Dept Phys, Adv Optoelect Technol Ctr, Tainan 701, Taiwan

[2] Natl Cheng Kung Univ, Inst Electroopt Sci & Engn, Adv Optoelect Technol Ctr, Tainan 701, Taiwan

[3] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[4] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 07期

关键词：

D O I：

10.1063/1.3627170

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Blending 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ), a high electron affinity organic molecule, with N, N'-bis-(1-naphyl)-N, N'-diphenyl-1,1'-biphenyl'-4,4'-diamine (NPB) creates the charge-transfer-complex molecules and modulates the magnetoconductance (MC) responses of devices by an applied electrical bias. A negative MC response (-0.60%) is observed for the device made of NPB: F4-TCNQ(30%) film as the active layer, which has a distinct characteristic to negligible MC responses in pristine NPB- and F4-TCNQ-based devices. We attribute the MC responses to the magnetic-field-dependent transport of injected charge carriers through charge-transfer-complex molecules in the NPB: F4-TCNQ system, which are varied with the F4-TCNQ blending concentrations and the injection of minority charge carriers. Results of this study demonstrate a turning point of MC responses at the bias voltage near the threshold of the bipolar injection. (C) 2011 American Institute of Physics. [doi:10.1063/1.3627170]

引用

页数：3

共 17 条

[1] Sign Inversion of Magnetoresistance in Space-Charge Limited Organic Devices [J].

Bloom, F. L. ;

Kemerink, M. ;

Wagemans, W. ;

Koopmans, B. .

PHYSICAL REVIEW LETTERS, 2009, 103 (06)

[2] 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)

[3]

Dediu VA, 2009, NAT MATER, V8, P707, DOI [10.1038/nmat2510, 10.1038/NMAT2510]

[4] 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)

[5] Magnetoresistance in organic light-emitting diode structures under illumination [J].

Desai, P. ;

Shakya, P. ;

Kreouzis, T. ;

Gillin, W. P. .

PHYSICAL REVIEW B, 2007, 76 (23)

[6] 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)

[7] Photoconductivity of poly(2,5-diheptyloxy-p-phenylene vinylene) in the air atmosphere: Magnetic-field effect and mechanism of generation and recombination of charge carriers [J].

Frankevich, E ;

Zakhidov, A ;

Yoshino, K ;

Maruyama, Y ;

Yakushi, K .

PHYSICAL REVIEW B, 1996, 53 (08) :4498-4508

[8] Singlet-triplet splitting of geminate electron-hole pairs in conjugated polymers -: art. no. 066803 [J].

Kadashchuk, A ;

Vakhnin, A ;

Blonski, I ;

Beljonne, D ;

Shuai, Z ;

Brédas, JL ;

Arkhipov, VI ;

Heremans, P ;

Emelianova, EV ;

Bässler, H .

PHYSICAL REVIEW LETTERS, 2004, 93 (06) :066803-1

[9] Magnetic field effects on organic electrophosphorescence [J].

Kalinowski, J ;

Cocchi, M ;

Virgili, D ;

Fattori, V ;

Di Marco, P .

PHYSICAL REVIEW B, 2004, 70 (20) :205303-1

[10] Quenching effects in organic electrophosphorescence [J].

Kalinowski, J ;

Stampor, W ;

Mezyk, J ;

Cocchi, M ;

Virgili, D ;

Fattori, V ;

Di Marco, P .

PHYSICAL REVIEW B, 2002, 66 (23) :1-15

← 1 2 →