Fig. 4: The loss mechanism of photovoltaic parameters of XY1b and MS5 + XY1b. | Nature Communications

Fig. 4: The loss mechanism of photovoltaic parameters of XY1b and MS5 + XY1b.

From: A molecular photosensitizer achieves a Voc of 1.24 V enabling highly efficient and stable dye-sensitized solar cells with copper(II/I)-based electrolyte

Fig. 4

a Photovoltaic performance losses due to non-ideal absorption (red), non-radiative recombination (blue and dark gray) and charge transport (light gray). The subscripts stand for measured current density–voltage (J−V) curve (meas), quasi Shockley–Queisser limit (qSQ), and transport limit (TL). Voc and FF stand for open-circuit photovoltage and fill factor, respectively. b Nano-second Flash photolysis measurements of dyes-sensitized TiO2 films immersed in a [Cu(II/I)(tmby)2][TFSI]2/1 redox electrolyte (EL) or an inert electrolyte (tmby = 4,4′,6,6′-tetramethyl-2,2′-bipyridine; TFSI = bis(trifluoromethylsulfonyl)imide). The solid lines are monoexponential fittings. Pump wavelength: 520 nm; probe wavelength, 815 nm. c The ideality factors of the DSCs based on the dyes XY1b and MS5 + XY1b. d The transport time as a function of applied voltage.

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