论文标题
Tris（8-羟基喹啉）铝的自旋依赖性电荷重组过程
Spin-Dependent Charge-Carrier Recombination Processes in Tris(8-Hydroxyquinolinato) Aluminum
论文作者
论文摘要
我们研究了Tris（8-羟基喹啉）铝（ALQ $ _3 $）在室温下使用连续波和电脉冲电磁共振磁共振（EDMR）光发射二极管的铝（ALQ $ _3 $）膜中自旋依赖性电荷载体重组的性质和动力学。我们发现，EDMR信号由电子孔重组过程和另一个较弱的EDMR信号主导，其基本性质被研究。从脉冲EDMR测量值中，我们获得了载体自旋松弛时间，$ t_2 = 45 \ pm 25 $ ns，比共轭聚合物的$ T_2 $短得多，但对于包含具有高原子数的元素的分子而言相对较长。使用多频连续波EDMR光谱，我们获得了电子和孔的局部超精细场分布及其各自的自旋轨道耦合诱导的G-FARCTOR和G-STRAIN值。
We have studied the nature and dynamics of spin-dependent charge carrier recombination in Tris(8-hydroxyquinolinato) aluminum (Alq$_3$) films in light emitting diodes at room temperature using continuous wave and pulsed electrically detected magnetic resonance (EDMR) spectroscopy. We found that the EDMR signal is dominated by an electron-hole recombination process, and another, weaker EDMR signal whose fundamental nature was investigated. From the pulsed EDMR measurements we obtained a carrier spin relaxation time, $T_2 = 45\pm 25$ ns which is much shorter than $T_2$ in conjugated polymers, but relatively long for a molecule containing elements with high atomic number. Using multi-frequency continuous wave EDMR spectroscopy, we obtained the local hyperfine field distributions for electrons and holes, as well as their respective spin-orbit coupling induced g-factor and g-strain values.
