fig4

Figure 4. (A) Morphological evolution of P3HT:PC₆₁BM with and without PCBSD or PCBS under thermal stress. (B) PCE of P3HT:PC₆₁BM with different PCBSD or PCBS fractions as a function of annealing time. Reproduced with permission. Copyright, 2011 John Wiley and Sons^[93]. (C) PCE and (D) thermal stability of P3HT:PC₆₁BM with different PCBTTE, PCBBTE and PCBTE contents. Reproduced with permission. Copyright, 2011 Elsevier^[94]. (E) Variation tendency of V_oc of P3HT:PC₆₁BM with various ICDA contents. Reproduced with permission. Copyright, 2011 American Chemical Society^[95].