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ACS Appl Mater Interfaces. 2013 Jun 26;5(12):5397-402. doi: 10.1021/am401584y. Epub 2013 Jun 14.

Enhanced light harvesting with a reflective luminescent down-shifting layer for dye-sensitized solar cells.

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Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran 14588-89694, Iran.


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.


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