Magnetic field modulated exciton generation in organic semiconductors: An intermolecular quantum correlated effect

被引：21

作者：

Ding, Baofu ^{[1
,2
]}

Yao, Yao ^{[1
]}

Sun, Xiaoyu ^{[1
]}

Gao, Xindong ^{[1
]}

Xie, Zuoti ^{[1
]}

Sun, Zhengyi ^{[1
]}

Wang, Zijun ^{[1
]}

Ding, Xunmin ^{[1
]}

Wu, Yizheng ^{[1
]}

Jin, Xiaofeng ^{[1
]}

Choy, Wallace C. H. ^{[2
]}

Wu, Chang-Qin ^{[1
]}

Hou, Xiaoyuan ^{[1
]}

机构：

[1] Fudan Univ, State Key Lab Surface Phys, Shanghai 200433, Peoples R China

[2] Univ Hong Kong, Dept Elect & Elect Engn, Hong Kong, Hong Kong, Peoples R China

来源：

PHYSICAL REVIEW B | 2010年 / 82卷 / 20期

基金：

中国国家自然科学基金;

关键词：

GIANT MAGNETORESISTANCE; SPIN SCATTERING; EMISSION;

D O I：

10.1103/PhysRevB.82.205209

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetoelectroluminescence (MEL) of organic semiconductor has been experimentally tuned by adopting blended emitting layer consisting of hole transporting material and electron transporting material. Theory based on Hubbard model fits experimental MEL well, which reveals two findings: (1) spin scattering and spin mixing, respectively, dominate MEL in low-field and high-field region. (2) Blended ratio, and thus the mobility, determines the value of the relative change in the EL in a given magnetic field. Finally successful prediction about the increase in singlet excitons in low field with little change in triplet exciton population further confirms the first finding.

引用

页数：6

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