Bright Mid-Wave Infrared Resonant-Cavity Light-Emitting Diodes Based on Black Phosphorus

Niharika Gupta, Hyungjin Kim, Nima Sefidmooye Azar, Shiekh Zia Uddin, Der Hsien Lien, Kenneth B. Crozier, Ali Javey

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The mid-wave infrared (MWIR) wavelength range plays a central role in a variety of applications, including optical gas sensing, industrial process control, spectroscopy, and infrared (IR) countermeasures. Among the MWIR light sources, light-emitting diodes (LEDs) have the advantages of simple design, room-temperature operation, and low cost. Owing to the low Auger recombination at high carrier densities and direct bandgap of black phosphorus (bP), it can serve as a high quantum efficiency emitting layer in LEDs. In this work, we demonstrate bP-LEDs exhibiting high external quantum efficiencies and wall-plug efficiencies of up to 4.43 and 1.78%, respectively. This is achieved by integrating the device with an Al2O3/Au optical cavity, which enhances the emission efficiency, and a thin transparent conducing oxide [indium tin oxide (ITO)] layer, which reduces the parasitic resistance, both resulting in order of magnitude improvements to performance.

Original languageEnglish
Pages (from-to)1294-1301
Number of pages8
JournalNano letters
Issue number3
Publication statusPublished - 2022 Feb 9

Bibliographical note

Funding Information:
The work at Berkeley was funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Contract DE-AC02-05-CH11231 (EMAT Program KC1201). The work at Melbourne was supported by the Australian Research Council (ARC) Centre of Excellence for Transformative Meta-Optical Systems (Project ID CE200100010) and the ARC Discovery Projects Scheme (DP210103428).

Publisher Copyright:
© 2022 American Chemical Society.

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering


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