The role of additive in diketopyrrolopyrrole-based small molecular bulk heterojunction solar cells

Hongyu Wang1, Feng Liu, Laju Bu

  • 1Department of Chemistry, Shanghai University, Shanghai, 200444, P. R. China.

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The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.