Antagonistic effects in structural design of sulfur-based polyimides as shielding layers for solar cells

A series of polyimides (PIs) was synthesized from 4,4′-diaminodiphenyl sulfide and various aromatic or aliphatic dianhydrides to obtain shielding layers for solar cells. Structural design strategy involved combination of alicyclic or fluorinated chemical sequences together with aromatic units and thioether bridges to optimize the balance between thermal stability, optical transparency and refractive index. Molecular modeling revealed significant...