Tailored Interface Energetics for Efficient Charge Separation in Metal Oxide-Polymer Solar Cells.

ABSTRACT: Hybrid organic-inorganic heterointerfaces in solar cells suffer from inefficient charge separation yet the origin of performance limitations are widely unknown. In this work, we focus on the role of metal oxide-polymer interface energetics in a charge generation process. For this purpose, we present novel benzothiadiazole based thiophene oligomers that tailor the surface energetics of the inorganic acceptor TiO₂ systematically. In a simple bilayer structure with the donor polymer poly(3-hexylthiophene) (P3HT), we are able to improve the charge generation process considerably. By means of an electronic characterization of solar cell devices in combination with ultrafast broadband transient absorption spectroscopy, we demonstrate that this remarkable improvement in performance ori

SUBMITTER: Ehrenreich P 

PROVIDER: S-EPMC6329763 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature