Effects of Thermal Annealing on the Solvent Additive P3HT PC₆₁BM Bulk Heterojunction Solar Cells

Effects of thermal annealing on the optical, electrical and structural properties of 3 vol% 1,8-diiodoctane added P3HT:PC₆₁BM active layers are investigated, concerning the performance of the bulk heterojunction polymer solar cells by changing the heat temperature. The structure information of the active layer is analyzed by using the grazing incidence wide angle scattering diffraction combined with the optical microscope, light absorption, photoluminescence and the external quantum efficiency spectra. The relationship between the detail of morphology and the optical, electrical properties is investigated.