title: Enhanced light harvesting with a reflective luminescent down-shifting layer for dye-sensitized solar cells.
abstract: For a dye-sensitized solar cell with a near-infrared squaraine (SQ1) sensitizer, the photovoltaic performance was enhanced remarkably with a reflective luminescent down-shifting (R-LDS) layer to increase the light-harvesting efficiency at the wavelength region 400-550 nm where the SQ1 dye has weak absorption. Relative enhancements greater than 200% in IPCE near 500 nm and 40-54% in JSC were achieved with red phosphor CaAlSiN3:Eu(2+) as the LDS material, attaining 5.0 and 4.8% overall efficiencies of power conversion for the R-LDS layer coated on the counter electrode (front illumination) and working electrode (back illumination), respectively.
authors.affiliation: Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran 14588-89694, Iran.
authors.forename: Zahra
authors.initials: Z
authors.lastname: Hosseini
authors.forename: Wei-Kai
authors.initials: WK
authors.lastname: Huang
authors.forename: Cheng-Ming
authors.initials: CM
authors.lastname: Tsai
authors.forename: Teng-Ming
authors.initials: TM
authors.lastname: Chen
authors.forename: Nima
authors.initials: N
authors.lastname: Taghavinia
authors.forename: Eric Wei-Guang
authors.initials: EW
authors.lastname: Diau