Electrically Confined Electroluminescence of Neutral Excitons in WSe₂ Light‐Emitting Transistors (Adv. Mater. 14/2024)

Electrically Confined Electroluminescence In article number 2310498, Gwan-Hyoung Lee and co-workers demonstrate electrically confined electroluminescence of neutral excitons in WSe2 light-emitting transistors (LETs). By achieving balanced concentrations of injected electrons and holes, and confining neutral exciton within the 1D region, the WSe2 LETs exhibit strong electroluminescence with a high external quantum efficiency (EQE) of ≈8.2% at room temperature, which will be a promising approach to enhancing the EQE and modulating exciton complexes for 2D excitonic devices.