Theoretical investigation of voltage effect on magnetoresistance in an organic small molecule device

被引:2
作者
Li, Xiao-xue [1 ]
Xie, Shi-jie [1 ]
机构
[1] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
关键词
Organic magnetoresistance; Small molecule; Polaron mobility; ROOM-TEMPERATURE; CONJUGATED POLYMER; SANDWICH DEVICES; SEMICONDUCTORS; ELECTRON; MOBILITY; ALUMINUM;
D O I
10.1016/j.orgel.2013.04.005
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We theoretically study the voltage effect on organic magnetoresistance (OMAR) in a weak disordered small molecule device on the basis of the quantum dynamics. It is found that with the increase of the voltage, the OMAR effect is reduced. The results show a good agreement with the experimental data. In addition, the carrier density effect on OMAR has also been discussed. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:1763 / 1768
页数:6
相关论文
共 31 条
[1]   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)
[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]  
Brankin R. W., RKSUITE: Software for ODE IVPS
[4]   Electron drift mobility and electroluminescent efficiency of tris(8-hydroxyquinolinolato) aluminum [J].
Chen, BJ ;
Lai, WY ;
Gao, ZQ ;
Lee, CS ;
Lee, ST ;
Gambling, WA .
APPLIED PHYSICS LETTERS, 1999, 75 (25) :4010-4012
[5]   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)
[6]   Theoretical investigation on organic magnetoresistance based on Zeeman interaction [J].
Dong, Xian-Feng ;
Li, Xiao-Xue ;
Xie, Shi-Jie .
ORGANIC ELECTRONICS, 2011, 12 (11) :1835-1840
[7]   Large magnetoresistance at room temperature in semiconducting polymer sandwich devices -: art. no. 185 [J].
Francis, TL ;
Mermer, Ö ;
Veeraraghavan, G ;
Wohlgenannt, M .
NEW JOURNAL OF PHYSICS, 2004, 6 :1-8
[8]   Magnetic-Field Effects in Organic Semiconducting Materials and Devices [J].
Hu, Bin ;
Yan, Liang ;
Shao, Ming .
ADVANCED MATERIALS, 2009, 21 (14-15) :1500-1516
[9]   POLARON TO BIPOLARON TRANSITION IN A CONJUGATED POLYMER - RUBIDIUM-DOPED POLY(P-PHENYLENEVINYLENE) [J].
IUCCI, G ;
XING, K ;
LOGDLUND, M ;
FAHLMAN, M .
CHEMICAL PHYSICS LETTERS, 1995, 244 (1-2) :139-144
[10]   Power law behavior of magnetoresistance in tris(8-hydroxyquinolinato)aluminum-based organic light-emitting diodes [J].
Kang, Hoju ;
Park, Chan Hyuk ;
Lim, Jongsun ;
Lee, Changjin ;
Kang, Woun ;
Yoon, Choon Sup .
ORGANIC ELECTRONICS, 2012, 13 (06) :1012-1017