Chiral-induced spin selectivity enables a room-temperature spin light-emitting diode
Chiral-induced spin selectivity enables a room-temperature spin light-emitting diode
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DOI：
10.1126/science.abf5291
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发表时间：
2021-03-12
期刊：
影响因子：
56.9
通讯作者：
Beard, Matthew C.
中科院分区：
文献类型：
--
作者：
Kim, Young-Hoon;Zhai, Yaxin;Beard, Matthew C.
在传统的光电方法中，对自旋、电荷和光的控制需要同时使用电场和磁场。在自旋偏振发光二极管（自旋LED）中，注入电荷，并且从自旋偏振载流子对发射圆偏振光。通常，载流子的注入随着电场的施加而发生，而自旋极化可以使用施加的磁场或极化的铁磁接触来实现。我们使用手性诱导自旋选择性（CISS）来产生自旋极化载流子，并展示了在室温下工作而没有磁场或铁磁接触的自旋LED。CISS层由层状有机-无机金属卤化物混合半导体框架内的定向自组装小手性分子组成。自旋LED在室温下实现了+/-2.6%的圆偏振电致发光。
In traditional optoelectronic approaches, control over spin, charge, and light requires the use of both electrical and magnetic fields. In a spin-polarized light-emitting diode (spin-LED), charges are injected, and circularly polarized light is emitted from spin-polarized carrier pairs. Typically, the injection of carriers occurs with the application of an electric field, whereas spin polarization can be achieved using an applied magnetic field or polarized ferromagnetic contacts. We used chiral-induced spin selectivity (CISS) to produce spin-polarized carriers and demonstrate a spin-LED that operates at room temperature without magnetic fields or ferromagnetic contacts. The CISS layer consists of oriented, self-assembled small chiral molecules within a layered organic-inorganic metal-halide hybrid semiconductor framework. The spin-LED achieves +/- 2.6% circularly polarized electroluminescence at room temperature.