title: Photonic crystal intermediate reflectors for micromorph solar cells: a comparative study.
abstract: Wave-optics analysis is performed to investigate the benefits of utilizing Bragg-reflectors and inverted ZnO opals as intermediate reflectors in micromorph cells. The Bragg-reflector and the inverted ZnO opal intermediate reflector increase the current generated in a 100 nm thick upper a-Si:H cell within a micromorph cell by as much as 20% and 13%, respectively. The current generated in the bottom muc-Si:H cell within the micromorph is also greater when the Bragg-reflector is used as the intermediate reflector. The Bragg-reflector outperforms the ZnO inverted opal because it has a larger stop-gap, is optically thin, and due to greater absorption losses that occur in the opaline intermediate reflectors.
authors.affiliation: Department of Materials Science and Engineering, University of Toronto, 184 College Street, room 140 Toronto, Ontario M5S 3E4, Canada.
authors.forename: P G
authors.initials: PG
authors.lastname: O'Brien
authors.forename: A
authors.initials: A
authors.lastname: Chutinan
authors.forename: K
authors.initials: K
authors.lastname: Leong
authors.forename: N P
authors.initials: NP
authors.lastname: Kherani
authors.forename: G A
authors.initials: GA
authors.lastname: Ozin
authors.forename: S
authors.initials: S
authors.lastname: Zukotynski