Traps as interaction sites for hyperfine mixing: The origin of magnetoconductance in organic light-emitting diodes
Traps as interaction sites for hyperfine mixing: The origin of magnetoconductance in organic light-emitting diodes
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陷阱作为超精细混合的相互作用位点：有机发光二极管磁导的起源
DOI：
10.1016/j.orgel.2016.10.025
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发表时间：
2016-12
影响因子：
3.2
通讯作者：
Zuhong Xiong
中科院分区：
文献类型：
--
作者：
Qiaoming Zhang;Lijia Chen;Weiyao Jia;Yanlian Lei;Zuhong Xiong
研究了双极注入条件下有机电致发光器件中磁电导（MC）的起源，器件中含有原始的超黄聚对苯乙炔（SY-PPV）或SY-PPV：苯基-C61-丁酸甲酯（PCBM）（xwt%）共混物作为有源层。在原始的SY-PPV器件中，发现MC的低场分量总是大于高场分量。此外，随着电应力时间的增加，低场分量增加，然后饱和，而高场分量保持不变。这些行为进行了分析，使用经验公式（包含一个洛伦兹函数和一个非洛伦兹函数），这表明在MC响应的主导机制是发生在陷阱网站的单和三重态极化子对之间的超精细混合。这些陷阱的具体作用，提供超精细混合的相互作用网站，证实了通过掺杂的活性层与PCBM的被困极化子对状态的寿命控制。
The origin of magnetoconductance (MC) in organic light-emitting diodes under bipolar injection conditions was investigated using devices containing pristine Super-Yellow poly(phenylene vinylene) (SY-PPV) or SY-PPV:phenyl-C61-butyric acid methyl ester (PCBM) (xwt%) blends as the active layers. In pristine SY-PPV device, it was found that the low-field component of MC was always larger than the high-field component. Additionally, the low-field component increased and then saturated with increasing the electrical stressing time, whereas the high-field component remained unchanged. These behaviors were analyzed using empirical formula (containing a Lorentzian and a non-Lorentzian function), which suggested that the dominant mechanism in the MC response was hyperfine mixing between single and triplet polaron pairs that occurred on trap sites. The specific role of these traps, providing interaction sites for hyperfine mixing, was confirmed by controlling the lifetime of the trapped polaron-pairs states by doping the active layer with PCBM.
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影响因子：
41.2
作者：
Nicolai, H. T.;Kuik, M.;Blom, P. W. M.
通讯作者：
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影响因子：
8.6
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影响因子：
3.7
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影响因子：
3.7
作者：
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通讯作者：
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