Hyperfine interaction vs. spin-orbit coupling in organic semiconductors
Hyperfine interaction vs. spin-orbit coupling in organic semiconductors
复制标题
有机半导体中的超精细相互作用与自旋轨道耦合
DOI：
10.1039/c6ra23767c
复制
发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Guan, Y. X.
中科院分区：
文献类型：
--
作者：
Niu, L. B.;Chen, L. J.;Guan, Y. X.
有机半导体在电流中已显示出磁场响应。这种现象通常归因于超精细相互作用（HFI）和自旋 - 轨道耦合（SOC）。我们首次报道了对有机半导体聚[9,9 - 二 - n - 己基 - 芴基 - 2,7 - 二基]的一种薄膜中超精细相互作用与自旋 - 轨道耦合以及用双[2 - (2' - 苯并噻吩基) - 吡啶基 - N,C3']铱(乙酰丙酮)配合物掺杂PFO的显著影响的实验和理论研究。分子内HFI和SOC仅取决于给定分子中电子、原子核和轨道场之间的分子内相互作用。磷光和荧光光谱用于测量自旋 - 轨道耦合强度。此外，HFI是一种短程相互作用，分子间HFI可忽略不计。分子间SOC不仅取决于分子结构，还取决于相邻分子之间的距离。当相邻分子之间的距离减小时，分子间SOC强度显著增加。
Organic semiconductors have shown magnetic field responses in electrical currents. This phenomenon has been generally attributed to hyperfine interaction (HFI) and spin-orbit coupling (SOC). For the first time, we report the experimental and theoretical studies on hyperfine interaction vs. spin-orbit coupling in one thin film of organic semiconductor poly [9,9-di-n-hexyl-fluorenyl-2,7-diyl] and the dramatic influence of doping the PFO with complexes of bis [2-(2'-benzothienyl)-pyridinato-N, C3'] iridium (acetyl-acetonate). The intra-molecular HFI and SOC are only dependent on the intra-molecular interaction among electrons, nuclei and orbital field in a given molecule. Phosphorescence and fluorescence spectroscopies were used to measure the spin-orbit coupling strength. Furthermore, HFI is a short-range interaction and inter-molecular HFI is negligible. Inter-molecular SOC depends not only on molecular structure but also distance between adjacent molecules. Inter-molecular SOC strength increases strongly when the distance between adjacent molecules is decreased.