title: Effect of modular diffraction gratings on absorption in P3HT:PCBM layers.
abstract: Various gratings with 700 nm feature spacings are patterned on the reverse side of organic solar cell active layers to increase the path length and constrain light to the cell through total internal reflection. The absorption enhancement is studied for 15, 40, and 120 nm active layers. We were able to confine 9% of the incident light over the wavelength range of 400-650 nm, with thinner gratings having a greater enhancement potential. The measurement setup utilizing an integrating sphere to fully characterize scattered or diffracted light is also fully described.
authors: College of Optical Sciences, University of Arizona, Tucson, Arizona 85721, USA. cocilovo@email.arizona.edu
authors: Byron
authors: B
authors: Cocilovo
authors: Akram
authors: A
authors: Amooali
authors: Alejandra
authors: A
authors: Lopez-Santiago
authors: Jacob
authors: J
authors: Favela
authors: Safatul
authors: S
authors: Islam
authors: Binh
authors: B
authors: Duong
authors: Palash
authors: P
authors: Gangopadhyay
authors: Mahmoud
authors: M
authors: Fallahi
authors: Jeanne E
authors: JE
authors: Pemberton
authors: Jayan
authors: J
authors: Thomas
authors: Robert A
authors: RA
authors: Norwood