Case of perylene in the interstellar standard radiation field. Top: Maximum photoelectric efficiency (in %) for the BT, WD, and eK16 models as a function of the photon energy. The integrated value ϵ_PE is given in the legend. In dotted lines, we show E₂, the average KE of the photoelectron, uncorrected for the interaction with the grain (in gray) and corrected for this interaction (in black). The WD and eK16 curves use the corrected E₂. Bottom: Full yield for the three models, including the correction due to the electron-grain interaction with c_x = 0.15.