title: Efficiency above the Shockley-Queisser limit by using nanophotonic effects to create multiple effective bandgaps with a single semiconductor.
abstract: We present a pure photonic approach to overcome the Shockley-Queisser limit. A single material can show different effective bandgap, set by its absorption spectrum, which depends on its photonic structure. In a tandem cell configuration constructed from a single material, one can achieve two different effective bandgaps, thereby exceeding the Shockley-Queisser limit.
authors.affiliation: Department of Electrical Engineering and Ginzton Laboratory, Stanford University , Stanford, California 94305, United States.
authors.forename: Zongfu
authors.initials: Z
authors.lastname: Yu
authors.forename: Sunil
authors.initials: S
authors.lastname: Sandhu
authors.forename: Shanhui
authors.initials: S
authors.lastname: Fan