% Author: Dr. Matthias Jung, DL9MJ
% Year: 2020
\begin{tikzpicture}
    \pgfplotsset{every tick label/.append style={rotate=-90}}
    \begin{axis}[%
        axis lines=middle,
        yticklabel=\empty,
        xmin=0,
        xmax=2.1,
        ymin=0,
        ymax=3.5,
        xtick={0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8},
        xticklabels={
            ~,
            \qty{0.2}{\volt},
            ~,
            \qty{0.4}{\volt},
            ~,
            \qty{0.6}{\volt},
            ~,
            \qty{0.8}{\volt},
            ~,
            \qty{1.0}{\volt},
            ~,
            \qty{1.2}{\volt},
            ~,
            \qty{1.4}{\volt},
            ~,
            \qty{1.6}{\volt},
            ~,
            \qty{1.8}{\volt}},
        ytick={0},
        axis line style={-Triangle},
        xticklabel style={/pgf/number format/.cd,fixed,precision=1,use comma,fixed,fixed zerofill},
        xlabel style={at={(ticklabel* cs:1)},anchor=north east},
        ylabel style={at={(ticklabel* cs:1)},anchor=north east},
        ylabel={$I_\mathrm{F}$},
        xlabel={$U_\mathrm{F}$},
        scale only axis,
        height=3cm,
        width=\linewidth*\getDarcImageFactor        
    ]
    \addplot [forget plot]
        table[row sep=crcr]{%
        0	3.67879441171442e-13\\
    };
    \draw[thick] (0,0) to [short] ++(axis cs: 0.20,0) parabola ++(axis cs:0.10,3) to [open] ++(axis cs:0.0,0.3) node[](){1}; 
    \draw[thick] (0,0) to [short] ++(axis cs: 0.25,0) parabola ++(axis cs:0.38,3) to [open] ++(axis cs:0.0,0.3) node[](){2};
    \draw[thick] (0,0) to [short] ++(axis cs: 0.60,0) parabola ++(axis cs:0.13,3) to [open] ++(axis cs:0.0,0.3) node[](){3};
    \draw[thick] (0,0) to [short] ++(axis cs: 1.47,0) parabola ++(axis cs:0.28,3) to [open] ++(axis cs:0.0,0.3) node[](){4};
 
    \end{axis}
\end{tikzpicture}%