Figure 3: Photoluminescence and recombination study of the ternary devices.

(a) Photoluminescence spectra of PID2:PTB7-Th:PID2 (0.9:0.1, 0.8:0.2) and PTB7-Th films excited at 610 nm. (b) Dependence of J_sc on light intensity for the ternary system. (c) Dependence of V_oc on light intensity for the ternary system.