Topologically protected excitons in porphyrin thin films

Understand

The control of exciton transport in organic materials is of fundamental importance for the development of efficient light-harvesting systems.

• This transport is easily deteriorated by traps in the disordered energy landscape.
• Here, we propose and analyze a system that supports topological Frenkel exciton edge states.
• Backscattering of these chiral Frenkel excitons is prohibited by symmetry, ensuring that the transport properties of such a system are robust against disorder.