title: Incorporating multiple energy relay dyes in liquid dye-sensitized solar cells.
abstract: Panchromatic response is essential to increase the light-harvesting efficiency in solar conversion systems. Herein we show increased light harvesting from using multiple energy relay dyes inside dye-sensitized solar cells. Additional photoresponse from 400-590 nm matching the optical window of the zinc phthalocyanine sensitizer was observed due to Förster resonance energy transfer (FRET) from the two energy relay dyes to the sensitizing dye. The complementary absorption spectra of the energy relay dyes and high excitation transfer efficiencies result in a 35% increase in photovoltaic performance.
authors.affiliation: Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
authors.forename: Jun-Ho
authors.initials: JH
authors.lastname: Yum
authors.forename: Brian E
authors.initials: BE
authors.lastname: Hardin
authors.forename: Eric T
authors.initials: ET
authors.lastname: Hoke
authors.forename: Etienne
authors.initials: E
authors.lastname: Baranoff
authors.forename: Shaik M
authors.initials: SM
authors.lastname: Zakeeruddin
authors.forename: Mohammad K
authors.initials: MK
authors.lastname: Nazeeruddin
authors.forename: Tomas
authors.initials: T
authors.lastname: Torres
authors.forename: Michael D
authors.initials: MD
authors.lastname: McGehee
authors.forename: Michael
authors.initials: M
authors.lastname: Grätzel