title: Enhanced light absorption in thin film silicon solar cells with Fourier-series based periodic nanostructures.
abstract: We proposed a Fourier-series based periodic nanostructure(FSPN) for light trapping in thin film silicon solar cells. By globally optimizing the Fourier coefficients across entire silicon absorption spectrum, we obtained a FSPN structure with short circuit current density greater than 24 mA/cm(2) for a 1μm real silicon absorption layer. The spectral analysis shows at normal incidence the FSPN exhibits a collection effect of periodic gratings and performs over 84.6% better than random texture. The angular analysis shows that the FSPN outperforms grating and random textures within 70 °.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Guo
authors.forename: Dashuai
authors.initials: D
authors.lastname: Wang
authors.forename: Bang
authors.initials: B
authors.lastname: Liu
authors.forename: Shaorong
authors.initials: S
authors.lastname: Li
authors.forename: Xing
authors.initials: X
authors.lastname: Sheng