Perylene diimide based low band gap copolymers: synthesis, characterization and their applications in perovskite solar cells

Sulfonate‐Containing Polyelectrolytes for Perovskite Modification: Chemical Configuration, Property, and Performance

“…The trimer of sulfonate-containing fluorene and thiophene units keeps almost linear, the trimer of sulfonate-containing fluorene and alkyl chain-containing carbazole tilts a bit, while the trimer of sulfonate-containing fluorene and 9,9-dioctyl fluorene presents a spiral agglomeration with alkyl chains stretching inward. It reasonably concludes that STF's polymer chain has high conjugation and SCF's chain is more flexible, in agreement with the reports that bulkier alkyl substituted carbazole monomer hinders the coplanarity and intramolecular conjugation, [27,28] and thiophene units increase the conjugation. [27,29] By contrast, SPF's polymer chain is prone to agglomerate.…”

“…It reasonably concludes that STF's polymer chain has high conjugation and SCF's chain is more flexible, in agreement with the reports that bulkier alkyl substituted carbazole monomer hinders the coplanarity and intramolecular conjugation, [27,28] and thiophene units increase the conjugation. [27,29] By contrast, SPF's polymer chain is prone to agglomerate.…”

Molecular strategy towards ROMP-derived hyperbranched poly(olefin)s featuring various π-bridged perylene diimides

“…In recent years there has been significant interest in the preparation of highly conjugated polymers based on perylene diimide (PDI) building blocks. 8,[19][20][21][22][23][24][25] The use of PDI moiety for the design of HBPs framework to investigate π-π interactions is of great interest. The highly planar structure intrinsically enhances the π-π stacking interactions between planes, which favours the 1D growth of self-assemblies giving rise to supramolecular nanostructures 26 as well as electrical conductivity.…”

“…27 These features combined with the excellent optical, chemical and thermal stabilities, and the highly fused electron deficient core renders the PDI moiety to be a popular building block for optoelectronic applications. 8,[19][20][21][22][23][24][25] However, π-π interactions between the PDI moieties can become problematic from a solubility and processability standpoint. Thus, the performance of PDI based electron accepting systems are hindered by the excessive and uncontrolled molecular aggregation of the PDI moiety, which greatly affects the solubility, phase separation, dissociation and charge transport in polymeric materials.…”

Living ring‐opening metathesis polymerization of norbornenes bay‐functionalized perylene diimides

“…Its unique properties such as strong visible light absorption, high luminescence efficiency, and low‐lying frontier molecular orbital (FMO) energy levels represent the PDI unit to be an excellent class of scaffold for use in optoelectronic and photovoltaic applications 2,3 . As such well tunable PDI‐based derivatives have been widely utilized as n ‐type organic semiconducting non‐fullerene 4 or polymer acceptors in the design and fabrication of organic solar cells (OSCs), 5 organic light emitting diodes (OLEDs), 6 perovskites, 7 dye lasers, 8 sensors, 9,10 and bioimaging chromophores 11 . PDI‐based material can also be assembled into well‐defined ordered nanostructures such as fibers, rods, wires, and belts 12,13 .…”