Benzo[1,2-b:4,5-b′]diselenophene-fused nonfullerene acceptors with alternative aromatic ring-based and monochlorinated end groups: a new synergistic strategy to simultaneously achieve highly efficient organic solar cells with the energy loss of 0.49 eV

Abstract

The PCE of 13.68% with the Eloss of 0.49 eV were obtained, which were the highest values obtained to date in binary PSCs with monochlorinated NF-SMAs.

Nonhalogenated Solvent‐Processed Thick‐Film Ternary Nonfullerene Organic Solar Cells with Power Conversion Efficiency >13% Enabled by a New Wide‐Bandgap Polymer

“…[ 26 ] Furthermore, the use of PBDB‐T coupled with an NFA produced using a nonhalogenated solvent led to a PCE of 13.68% and low energy loss ( E loss ). [ 31 ] Encouragingly, the use of PBDB‐T with a siloxane‐functionalized polymer led to a PCE of 10%, whereas a PCE > 9.56% was reported for the corresponding ternary OSC device. [ 32,33 ] In addition, a PCE > 10% was reported for NFOSCs produced using a CPME solvent.…”

Synthesis and absorption properties of small-molecule acceptor based rich-electronic benzodiselenophene core with hybrid bromination and fluorination end-group

“…Compound BDSe-CHO was synthesized in accordance with past work of our group and FBr-IC was obtained by referring the reported literature. [14,22] As shown in Scheme 1, BDSe-FBr was afforded via the Knoevenagel condensation of BDSe-CHO with FBr-IC in 86% yield. In detail, FBr-IC (0.26 g, 0.93 mmol) and BDSe-CHO (0.20 g, 0.18 mmol) were added into a 50 mL two-neck round-bottom flask, and the mixture was evacuated and backfilled with N 2 three times.…”

“…BDSe core can also improve the electron mobility and optimize molecular crystal characteristics. [14] Moreover, heteroatom with more electron number enhanced intermolecular interaction, which results in the small bandgap and energy loss. [15] Halogenated 1,1-dicyanomethylene-3-indanone (IC) as an end-group unit plays an important role, in promoting the development of A-D-A type acceptors16.…”

High-yielding Pd2(dba)3·C6H6-based four-fold Sonogashira coupling with selenophene-conjugated magnesium tetraethynylporphyrin for organic solar cells

“…51 Peng et al constructed a benzo[1,2-b:4,5-b 0 ]diselenophenefused (BDSePhCl) non-fullerene acceptor to achieve an excellent PCE of 13.68% in 2019. 52 Notably, the blended lms of BDSePhCl and polymer donor materials had more suitable phase separation, better charge generation properties, and more balanced carrier mobilities.…”