• Nattestad, A.; Cheng, Y.-Y.; MacQueen, R.W.; Schulze, T.F.; Thompson, F.W.; Mozer, A.J.; Fückel, B.; Khoury, T.; Crossley, M.J.; Lips, K.; Wallace, G.G.; Schmidt, T.W.: Dye-Sensitized Solar Cell with Integrated Triplet-Triplet Annihilation Upconversion System. The Journal of Physical Chemistry Letters 4 (2013), p. 2073-2078

10.1021/jz401050u

Abstract:
Photon upconversion (UC) by triplet-triplet annihilation (TTA-UC) is employed in order to enhance the response of solar cells to sub-bandgap light. Here, we present the first report of an integrated photovoltaic device, combining a dye-sensitized solar cell (DSC) and TTA-UC system. The integrated device displays enhanced current under sub-bandgap illumination, resulting in a figure of merit (FoM) under low concentration (3 suns), which is competitive with the best values recorded to date for nonintegrated systems. Thus, we demonstrate both the compatibility of DSC and TTAUC and a viable method for device integration.