Comparative study: the effect of annealing conditions on the properties of P3HT:PCBM blends

This paper presents a detailed study on the role of various annealing treatments on organic poly(3-hexylthiophene) and [6]-phenyl-C61-butyric acid methyl ester blends under different experimental conditions. A combination of analytical tools is used to study the alteration of the phase separation, structure and photovoltaic properties of the P3HT:PCBM blend during the annealing process. Results showed that the thermal annealing yields PCBM ‘‘needle-like’’ crystals and that prolonged heat treatment leads to extensive phase separation, as demonstrated by the growth in the size and quantity of PCBM crystals. The substrate annealing method demonstrated an optimal morphology by eradicating and suppressing the formation of fullerene clusters across the film, resulting in longer P3HT fibrils with smaller diameter. Improved optical constants, PL quenching and a decrease in the P3HT optical bad-gap were demonstrated for the substrate annealed films due to the limited diffusion of the PCBM molecules. An effective strategy for determining an optimized morphology through substrate annealing treatment is therefore revealed for improved device efficiency.Web of Scienc

Defect investigations in organic solar cells

International audienc

Defect investigations in organic solar cells

International audienc

Interfacial Effect on Defect Formation in P3HT:PCBM Based Solar Cells

International audienc

Analyses de mélange chez les ruminants : Une nouvelle approche dans le diagnostic des facteurs de risque en élevage

National audienc

Defects and degradation of organic solar cells

International audienc

Interfacial Effect on Defect Formation in P3HT:PCBM Based Solar Cells

International audienc

Defects and degradation of organic solar cells

International audienc

Defect investigations in PCBM : P3HT organic photovoltaic solar cells

International audienc

Defauts dans les cellules solaires a base de P3HT:PCBM

National audienc