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Electrical dipole-dipole interaction effects on magnetocurrent in organic phosphorescent materials
Shao, Ming1; Dai, Yanfeng2; Ma, Dongge2; Hu, Bin1,3
2011-08-15
Source PublicationAPPLIED PHYSICS LETTERS
ISSN0003-6951
Volume99Issue:7
AbstractThis letter reports the experimental studies on electrical dipole-dipole interaction effects on magnetocurrent (MC) and magneto-electroluminescence (MFE(EL)) based on two phosphorescent dyes: heavy-metal complex Ir(ppy)(3) and Ir(ppy)(2)(acac) with strong spin-orbital coupling but different electrical dipole moments. We find that the Ir(ppy)(3) with strong electrical dipole moment shows negligible MC and MFE(EL). However, the Ir(ppy)(2)(acac) with weak dipole moment exhibits appreciable MC and MFE(EL). The experimental results suggest that the electrical dipole-dipole interaction can change the MC and MFE(EL) from capture-based regime, where charge carriers are captured through spin-dependent process at short distance, to intersystem crossing-based regime, where charge carriers are captured through spin random process at long distance. As a result, changing electrical dipole-dipole interaction presents a new pathway to tune magnetic field effects in organic semiconductors. (C) 2011 American Institute of Physics. [doi:10.1063/1.3623435]
DOI10.1063/1.3623435
Indexed BySCI
Language英语
WOS IDWOS:000294208900057
PublisherAMER INST PHYSICS
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/72706
Collection中国科学院化学研究所
Corresponding AuthorShao, Ming
Affiliation1.Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
2.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Grad Sch, Changchun 130022, Peoples R China
3.Huazhong Univ Sci & Technol, Wu Han Natl Lab Optoelect, Wuhan 430074, Peoples R China
Recommended Citation
GB/T 7714
Shao, Ming,Dai, Yanfeng,Ma, Dongge,et al. Electrical dipole-dipole interaction effects on magnetocurrent in organic phosphorescent materials[J]. APPLIED PHYSICS LETTERS,2011,99(7).
APA Shao, Ming,Dai, Yanfeng,Ma, Dongge,&Hu, Bin.(2011).Electrical dipole-dipole interaction effects on magnetocurrent in organic phosphorescent materials.APPLIED PHYSICS LETTERS,99(7).
MLA Shao, Ming,et al."Electrical dipole-dipole interaction effects on magnetocurrent in organic phosphorescent materials".APPLIED PHYSICS LETTERS 99.7(2011).
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