Surface photovoltage method for evaluation of exciton diffusion length in fluorene–thiophene based copolymers

Abstract

Photovoltage spectra were measured under illumination from both the free surface and the substrate side of the layers. For the copolymers under study the diffusion length was determined.

Keywords: Conjugated polymers, Thin films, Fluorene-thiophene, surface photovoltage, Diffusion length.

Keywords

• Conjugated polymers
• Thin films
• Fluorene-thiophene
• surface photovoltage
• Diffusion length