Wide Bandgap Perylene Diimide Derivatives as an Effective Third Component for Parallel Connected Ternary Blend Polymer Solar Cells

• DOI: 10.1021/acs.chemmater.1c02007
• Publication Date: 2021-09-17T16:16:52Z
• Authors: Liyang Yu; Meiling Zhang; Jie Tang; Ruipeng Li; Xiaopeng Xu; Qiang Peng
• Keywords: Diimide; Acceptor

Constructing a ternary blend active layer for polymer solar cells (PSCs) is widely explored approach to achieve high power conversion efficiency (PCE). To this, multiple approaches have been dual-acceptor PSCs including acceptor alloy and cascade. Parallel connection another working mechanism of blends with the advantage large freedom in selection materials largely different absorption ranges. Here, we purposely designed two propeller-like perylene diimide (PDI) derivatives, TT-PDI TZ-PDI, central cores selected one as third component be added into PM6:Y6 blend. The highest PCE 17.52% was obtained 10% Y6 replaced by TZ-PDI our knowledge, this first report PDI derivative significantly increased device performance. improved ascribed photon due wide bandgap amorphous structure which paved functional parallel charge generation route without interfering nanostructure This work demonstrated connected viable construct efficient chemical designing strategy suitable blends.