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organic semiconductors

Spectral signatures of a negative polaron in a doped polymer semiconductor: Energy levels and hubbard U interactions

D. Lungwitz et al. | J. Phys. Chem. Lett. 14 (2023)

The modern picture of negative charge carriers on conjugated polymers invokes the formation of a singly occupied (spin-up/spin-down) level within the polymer gap and a corresponding unoccupied level above the polymer conduction band edge. The energy splitting between these sublevels is related to...

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perovskites

Effect of ground state charge transfer and photoinduced charge separation on the energy level alignment at metal halide perovskite/organic charge transport layer interfaces

L. Frohloff et al. | Appl. Phys. A 129 (2023)

One of the most promising routes for the future fabrication of solution-processable high-performance solar cells is to employ metal halide perovskites as photoactive material combined with organic semiconductors as charge extraction layers. An essential requirement to obtain high device performance...

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2D semiconductors

Atomic-scale electric potential landscape across molecularly gated bilayer MoS2 resolved by photoemission

L. Scholz et al. | ACS Nano 19 (2025)

Electric gating in atomically thin field-effect devices based on transition-metal dichalcogenides has recently been employed to manipulate their excitonic states, even producing exotic phases of matter, such as an excitonic insulator or Bose–Einstein condensate. Here, we mimic the electric gating...

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