A solution-processable bipolar diketopyrrolopyrrole molecule used as both electron donor and acceptor for efficient organic solar cells

Abstract

A DPP molecule has appropriate energy levels and bipolar charge-transport properties for both donor and acceptor in OSCs.

Efficient ternary blend polymer solar cells with a bipolar diketopyrrolopyrrole small molecule as cascade material

“…Recently, we designed and synthesized a new diketopyrrolopyrrole small molecule (F(DPP) 2 B 2 ) with bipolar charge-transporting property [36]. This molecule shows intense absorption in the range of 550-700 nm which is complement well with that of P3HT and exhibits suitable the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels matching perfectly those of PCBM and P3HT.…”

Perspective of a new trend in organic photovoltaic: ternary blend polymer solar cells

“…So only one kind of charge carrier it can prefer to transport. Recently, Chen's group [48] reported a new diketopyrrolopyrrole small molecule (F(DPP) 2 B 2 ) with bipolar charge-transporting property. When it is used as either an acceptor blended with P3HT or a donor blended with PCBM, the resulting organic solar cells demonstrate good PCEs over 3%, which shows that (F(DPP) 2 B 2 ) has a bipolar charge-transporting property.…”

Synthesis and Characterization of Two-Dimensional Conjugated Polymers Incorporating Electron-Deficient Moieties for Application in Organic Photovoltaics

“…Furthermore, two electron-withdrawing groups, TPD and DPP units, were employed as the third copolymerization unit to build the terpolymers, PTTVBDT-TPD and PTTVBDT-DPP, respectively. Thieno [3,4-c]pyrrole-4,6-dione (TPD) and DPP units both have been also widely used as building blocks and electron-withdrawing groups in high performance conjugated polymers due to their symmetric, rigidly fused, and coplanar structures [11,[27][28][29][30]. For these three polymers, their optical, thermal, molecular energy levels, crystallographic, and photovoltaic properties were characterized carefully and systematically, making comparisons between each of them.…”

“…Furthermore, two electron-withdrawing groups, TPD and DPP units, were employed as the third copolymerization unit to build the terpolymers, PTTVBDT-TPD and PTTVBDT-DPP, respectively. Thieno [3,4-c]pyrrole-4,6-dione (TPD) and DPP units both have been also widely used as building blocks and electron-withdrawing groups in high performance conjugated polymers due to their symmetric, rigidly fused, and coplanar structures [11,[27][28][29][30]. For [16][17][18][19][20].…”