Perylene Diimide‐Based Conjugated Polymers for All‐Polymer Solar Cells

Abstract

In recent decades, non-fullerenea cceptors (NFAs) are undergoing rapid development and emerging asahot area in the field of organic solar cells. Amongt he high-performance non-fullerene acceptors, aromatic diimide-based electron acceptors remain to be highly promising systems. This review discusses the important progress of perylene dii-mide (PDI)-based polymers as non-fullerenea cceptors in allpolymer solar cells(all-PSCs)s ince 2014. The relationship between structure andp roperty,m atching aspects between donors and acceptors, and device fabrications are unveiled from as ynthetic chemist perspective.

Dominant Effect of UV-Light-Induced “Burn-in” Degradation in Non-Fullerene Acceptor Based Organic Solar Cells

“…Organic solar cells (OSCs) are attractive candidates as global green-energy sources due to factors such as solution processability, semitransparency, flexibility, and efficient indoor performance. Recent advancements in the power conversion efficiency (PCE) of non-fullerene acceptor based bulk heterojunction (BHJ) OSCs indicate a promising future for commercial feasibility. − Currently, a PCE exceeding 17% for single-junction binary and ternary devices, also with the existing donor–acceptor (D–A) combination, 20% PCE, is within reach. − The molecular design strategy has largely focused mainly on improving efficiency magnitudes . Efforts to improve long-term stability have gathered momentum. − A comprehensive understanding of factors contributing to device stability and degradation mechanisms will assist in optimizing these devices for high efficiency over long lifetimes.…”

Axially chiral bay-tetraarylated perylene bisimide dyes as non-fullerene acceptors in organic solar cells

“…4 Thus, they found application in many parts of OSCs besides NFAs such as interlayer dopants, 5 cathode interlayers 6 and acceptor polymers. 7 Even if the focus on current NFA research has moved towards solution-processable A-D-A structural motifs such as ITIC 8,9 or Y6, 10 PBIs still hold significant importance in this field. 11,12 Todays PBI-based NFAs are typically designed as twisted or star-shaped arrangements of multiple PBIs attached to each other by single or annulated bonding in bay, ortho or imide position.…”

“…1a) with aryl substituents ranging from phenyl and para-trifluoromethyl phenyl over 1-and 2naphthyl up to 1-pyrenyl for which for the first time we obtained the structural proof on its chirally twisted geometry via single-crystal structure analyses. 22 Based on early predictions on the formation of highly stable atropo-enantiomers for such tetraphenyl PBIs, 28 first experimental investigation of tetraarylated PBIs chirality was done in 2014 29 but did not find a way into a solid-state application so far unlike the closely related ortho-p-extended PBI double- [7]heterohelicenes utilizing the chiral core twist for a circular polarized light detection device. 30 Even if Sun and co-workers utilized the twisted geometry to design well-soluble and potent NFAs, 24,25 the impact of enantiopurity as well as the imide substituents remained so far unexplored.…”

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 .…”