Organic solar cells require suitable anode surface modifiers in order to selectively collect positive charge carriers and improve device performance. We employ a nickel metal organic ink precursor to fabricate NiO hole transport layers on indium tin oxide anodes. This solution deposited NiO annealed at 250 °C and plasma treated, achieves similar OPV device results reported with NiO films from PLD as well as PEDOT:PSS. We demonstrate a tunable work function by post-processing the NiO with an O2-plasma surface treatment of varied power and time. We find that plasma treatment is necessary for optimal device performance. Optimal devices utilizing a solution deposited NiO hole transport layer show lower series resistance and increased fill factor when compared to solar cells with PEDOT:PSS.
CITATION STYLE
Giebink, N. C., Wiederrecht, G. P., Wasielewski, M. R., & Forrest, S. R. (2010). Ideal diode equation for organic heterojunctions. I. Derivation and application. Physical Review B, 82(15). https://doi.org/10.1103/physrevb.82.155305
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