Fig. 2: Creep Behaviors of the BHJ Films.
From: Multi-scale mechanical properties of bulk-heterojunction films in polymer solar cells
a Creep curves of the PM6-based blend films with different acceptors under the same constant force. b Four-element viscoelastic model used to fit the creep deformation. c ε1, d ε2 and e ε3 and their proportions in the total creep deformations versus creep time. Insets in c–e: Schematic diagram of the molecular movements. f Schematic diagram of creep deformation of the films based on different acceptors.
