Electrically driven amplified spontaneous emission from colloidal quantum dots

Abstract Colloidal quantum dots (QDs) are attractive materials for realizing solution-processable laser diodes that could benefit from size-controlled emission wavelengths, low optical-gain thresholds and ease of integration with photonic and electronic circuits 1–7 . However, the implementation of such devices has been hampered by fast Auger recombination of gain-active multicarrier states 1,8 , poor stability of QD films at high current densities 9,10 and the difficulty to obtain net optical gain in a complex device stack wherein a thin electroluminescent QD layer is combined with optically lossy charge-conducting layers 11–13 . Here we resolve these challenges and achieve amplified spontaneous emission…

• UD
  U.S. Department of Energy

  Award: 89233218CNA000001
• NN
  National Nuclear Security Administration

  Award: 89233218CNA000001
• LD
  Laboratory Directed Research and Development

  Awards: 89233218CNA000001, 20210176ER
• LA
  Los Alamos National Laboratory

  Awards: 20210176ER, 20230352ER, 89233218CNA000001