title: Grating-coupled surface plasmon resonance enhanced organic photovoltaic devices induced by Blu-ray disc recordable and Blu-ray disc grating structures.
abstract: In this work, we studied the performance enhancement of organic thin-film solar cells (OSCs) originating from the presence of diffraction gratings on the surface of the active layer. Two types of diffraction gratings, periodic gratings (Blu-ray disc recordable: BD-R) and quasi-random gratings (Blu-ray disc: BD), were employed as master templates for grating structures. The grating structures were introduced to the surfaces of poly(3-hexylthiophene) (P3HT):phenyl-C61-butyric acid methyl ester (PCBM) films, which were the active layers of the solar cells. The addition of the grating structures led to an increase of light absorption in the absorption region of P3HT:PCBM induced by light scattering. Furthermore, the grating-coupled surface plasmon resonance generated additional light absorption peaks. With illumination of non-polarized light at a normal incident angle, the short-circuit current densities of the BD-R and BD solar cells improved by 11.05% and 10.6%, respectively. Efficiency improvements of 19.28% and 3.21% were also observed for the BD-R and BD devices, respectively. Finally, the finite-difference time-domain simulation results revealed an enhanced electric field in the P3HT:PCBM layer, especially in the BD-R OSC devices.
authors.affiliation: Graduate School of Science and Technology, Niigata University, 8050, Ikarashi 2-nocho, Nishi-ku, Niigata 950-2181, Japan. ababa@eng.niigata-u.ac.jp.
authors.forename: Supeera
authors.initials: S
authors.lastname: Nootchanat
authors.forename: Apichat
authors.initials: A
authors.lastname: Pangdam
authors.forename: Ryousuke
authors.initials: R
authors.lastname: Ishikawa
authors.forename: Kanet
authors.initials: K
authors.lastname: Wongravee
authors.forename: Kazunari
authors.initials: K
authors.lastname: Shinbo
authors.forename: Keizo
authors.initials: K
authors.lastname: Kato
authors.forename: Futao
authors.initials: F
authors.lastname: Kaneko
authors.forename: Sanong
authors.initials: S
authors.lastname: Ekgasit
authors.forename: Akira
authors.initials: A
authors.lastname: Baba