Interlayer exciton landscape in WS₂/tetracene heterostructures

Abstract

The vertical stacking of two-dimensional materials into heterostructures gives rise to a plethora of intriguing optoelectronic properties and presents an unprecedented potential for technological development. While much progress has been...

Strong quenching of dye fluorescence in monomeric perylene orange/TMDC hybrid structures

“…Finally, the emission peak could be a sign of interlayer exciton formation, where the electron resides in the PO layer and the hole in the WSe 2 . 28,54,55 Summing up the m-PL measurements, we found a strong indication for uorescence intensity quenching as well as a relatively enhanced trion PL when combining PO with WSe 2 in a hybrid structure. Yet, we cannot distinguish unambiguously between charge and energy transfer as the dominant contribution to the uorescence quenching.…”

“…Finally, the emission peak could be a sign of interlayer exciton formation, where the electron resides in the PO layer and the hole in the WSe 2 . 28,54,55…”

van der Waals 2D transition metal dichalcogenide/organic hybridized heterostructures: recent breakthroughs and emerging prospects of the device

“…Similarly, this p-n junction and ILX emission concept is also applicable for other TMD/organic semiconductors. 13,18,19 Again, for lasing, giant PL emission enhancement type I is needed. 14,20 Moreover, these heterostructures find application in electronic and optoelectronic devices including field-effect transistors (FETs) and photodetectors.…”

“…In this TMD/ organic heterostructure, electrons are localized on the 1L-WS 2 layer, while holes are localized (or could carriers be almost immobile with heavy effective mass) on the Tc film. 19,169 The distinct energy band alignment between the two materials gives rise to the formation of these interlayer CT excitons. The investigation reveals further that the photoexcitation energy below the Tc bandgap at 2.1 eV exclusively excites WS 2 while suppressing the background emission from Tc at an energy similar to those of the CT excitons.…”

“…In particular, Notably, they have identified a significant transfer of intensity from the intralayer TMD exciton to a series of energetically lower interlayer excitons with decreasing temperature. 19 Nevertheless, it is worth noting that type III alignment has not been reported thus far, and its occurrences in 2D/2D heterostructures are relatively scarce. An artificial neural network simulation, utilizing electronic synaptic arrays and trained on handwritten digit datasets, showcased an impressive recognition accuracy of 91.3%.…”