Abstract

A van der Waals light-emitting diode architecture composed of Cr₂Ge₂Te₆ electrodes, hBN tunneling barriers, and monolayer WSe₂ is reported. The device shows nonmonotonic electroluminescence intensity versus tunneling bias, attributed to resonant and antiresonant tunneling governed by the density of states of Cr₂Ge₂Te6. Room-temperature photoluminescence and electroluminescence reveal neutral-exciton and trion emission from WSe2, while current-voltage measurements show asymmetry between positive and negative bias. The authors compare the measured bias dependence with density-functional-calculated density of states for Cr₂Ge₂Te6.

Abstract

A van der Waals light-emitting diode architecture composed of Cr₂Ge₂Te₆ electrodes, hBN tunneling barriers, and monolayer WSe₂ is reported. The device shows nonmonotonic electroluminescence intensity versus tunneling bias, attributed to resonant and antiresonant tunneling governed by the density of states of Cr₂Ge₂Te6. Room-temperature photoluminescence and electroluminescence reveal neutral-exciton and trion emission from WSe2, while current-voltage measurements show asymmetry between positive and negative bias. The authors compare the measured bias dependence with density-functional-calculated density of states for Cr₂Ge₂Te6.

Abstract

A van der Waals light-emitting diode architecture composed of Cr₂Ge₂Te₆ electrodes, hBN tunneling barriers, and monolayer WSe₂ is reported. The device shows nonmonotonic electroluminescence intensity versus tunneling bias, attributed to resonant and antiresonant tunneling governed by the density of states of Cr₂Ge₂Te6. Room-temperature photoluminescence and electroluminescence reveal neutral-exciton and trion emission from WSe2, while current-voltage measurements show asymmetry between positive and negative bias. The authors compare the measured bias dependence with density-functional-calculated density of states for Cr₂Ge₂Te6.

Abstract

A van der Waals light-emitting diode architecture composed of Cr₂Ge₂Te₆ electrodes, hBN tunneling barriers, and monolayer WSe₂ is reported. The device shows nonmonotonic electroluminescence intensity versus tunneling bias, attributed to resonant and antiresonant tunneling governed by the density of states of Cr₂Ge₂Te6. Room-temperature photoluminescence and electroluminescence reveal neutral-exciton and trion emission from WSe2, while current-voltage measurements show asymmetry between positive and negative bias. The authors compare the measured bias dependence with density-functional-calculated density of states for Cr₂Ge₂Te6.