Example of a tunnel junction ============================ .. image:: tunnel_junction.png :width: 60% :align: center .. code-block:: Python import matplotlib.pyplot as plt from solcore.structure import TunnelJunction from solcore.solar_cell_solver import default_options from solcore.analytic_solar_cells import parametric_tunnel_junction # We define the tunnel junction and solve its properties tunnel = TunnelJunction(v_peak=0.2, j_peak=100, v_valley=0.9, j_valley=10, prefactor=10, j01=1e-21, kind='parametric') parametric_tunnel_junction(tunnel, default_options) v = tunnel.voltage plt.plot(v, tunnel.tunnel_current(v), 'r--', label='Tunnel') plt.plot(v, tunnel.excess_current(v), 'g--', label='Excess') plt.plot(v, tunnel.diffusion_current(v), 'b--', label='Diffusion') plt.plot(v, tunnel.current, 'k', linewidth=3, color='DimGray', label='Total') plt.plot((0.2, 0.9), (100, 10), 'ko') plt.annotate('V\$_P\$, J\$_P\$', xy=(0.2, 110), fontsize=12) plt.annotate('V\$_V\$, J\$_V\$', xy=(0.6, 10), fontsize=12) plt.legend(fontsize=12, frameon=False) plt.ylim(0, 150) plt.xlim(0, 2) plt.ylabel('Current Density(A/\$m^2\$)', fontsize=12) plt.xlabel('Voltage(V)', fontsize=12) plt.tick_params(labelsize=12) plt.tight_layout() plt.show()