Probing Trions at Chemically Tailored Trapping Defects.

ABSTRACT: Trions, charged excitons that are reminiscent of hydrogen and positronium ions, have been intensively studied for energy harvesting, light-emitting diodes, lasing, and quantum computing applications because of their inherent connection with electron spin and dark excitons. However, these quasi-particles are typically present as a minority species at room temperature making it difficult for quantitative experimental measurements. Here, we show that by chemically engineering the well depth of sp³ quantum defects through a series of alkyl functional groups covalently attached to semiconducting carbon nanotube hosts, trions can be efficiently generated and localized at the trapping chemical defects. The exciton-electron binding energy of the trapped trion approaches 119 meV, which m

SUBMITTER: Kwon H 

PROVIDER: S-EPMC6891859 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature