Extended Data Fig. 7: Stretchability test of PEIE_PFN-Br composite film.
From: High-efficiency stretchable light-emitting polymers from thermally activated delayed fluorescence
(a) The chemical structures of PEIE and PFN-Br. (b) Optical microscopy images of PEIE_PFN-Br composite films at 50%, 60%, 70%, and 100% strains. The stretching direction is horizontal. Therefore, the composite film can be stretched to 60% without cracking.
