Abstract
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.
Original language | American English |
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Pages (from-to) | 1129-1133 |
Number of pages | 5 |
Journal | Science |
Volume | 371 |
Issue number | 6534 |
DOIs | |
State | Published - 12 Mar 2021 |
Bibliographical note
Publisher Copyright:© 2021 American Association for the Advancement of Science. All rights reserved.
NREL Publication Number
- NREL/JA-5900-78453
Keywords
- perovskite
- quantum dots
- spin LED