Generation of Free Carriers in MoSe ₂ Monolayers Via Energy Transfer from CsPbBr ₃ Nanocrystals

Transition metal dichalcogenide (TMDCs) monolayers make an excellent component in optoelectronic devices such as photodetectors and phototransistors. Selenide-based TMDCs, specifically molybdenum diselenide (MoSe2) with low defect densities, show much faster photoresponses compared to their sulfide counterpart. However, the typically absorption of atomically thin MoSe2 monolayer high exciton binding energy limit photogeneration charge carriers. Yet, integration light-harvesting materials TMDCs can produce increased photocurrents via transfer. In this article, it is demonstrated that interaction cesium lead bromide (CsPbBr3) nanocrystals results into transfer efficiency over 86%, ascertained from quenching decay dynamics CsPbBr3 emission. Notably, increase emission heterostructure accounts only for 33% transferred energy. It found part excess generates directly free carriers monolayer, a result continuum. The enhanced respect single material unit proven. These demonstrate viable route overcome typical having impact on processes rely efficient dissociation.