Mid-infrared polarized emission from black phosphorus light-emitting diodes.

@article{Wang2020MidinfraredPE,
  title={Mid-infrared polarized emission from black phosphorus light-emitting diodes.},
  author={Junjia Wang and Adrien Rousseau and Meijun Yang and Tony Low and S 'ebastien Francoeur and St'ephane K'ena-Cohen},
  journal={Nano letters},
  year={2020}
}
We demonstrate a mid-infrared light-emitting diode based on the 2D semiconductor black phosphorus (BP). The device is composed of a mechanically exfoliated BP/molybdenum disulfide heterojunction. Under forward bias, it emits polarized electroluminescence at λ = 3.68 μm, with room-temperature internal and external quantum efficiencies of ~1% and ~0.03%, respectively. In our structure, outcoupling losses are dominated by radiation towards the high refractive index substrate. The ability to tune… Expand
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