Noncovalent Liquid Phase Functionalization of 2H-WS2 with PDI: An Energy Conversion Platform with Long-Lived Charge Separation br

Transition metal dichalcogenides are attractive 2D materials in the context of solar energy conversion. Previous investigations have focused predominantly on the properties of these systems. The realization of noncovalent hybrids with, for example, complementary electroactive materials remains underexplored to this date for exfoliated WS2. In this contribution, we explore WS2by means of exfoliation and integration together with visible light-absorbing and electron-accepting perylenediimides into versatile electron-donor acceptor hybrids. Important is the distinct electron-donating feature of WS2. Detailed spectroscopic investigations ofWS2-PDIconfirm the electron donor/acceptor nature of the hybrid and indicate that green light photoexcitation leads to the formation of long-livedWS2 center dot+-PDI center dot-charge-separated states