Additional file 2: Figure S1.

Normalized photovoltaic performances of P3HT:ICBA-based devices: (a) Jsc, (b) Voc, (c) FF, (d) PCE for three different LZO concentrations as a function of weeks.

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Kim et al. Nanoscale Research Letters 2014 9:150   doi:10.1186/1556-276X-9-150