Low-cost organic photovoltaic materials with great application potentials enabled by developing isomerized non-fused ring acceptors

Phthalimide-based unfused-ring non-fullerene acceptors for constructing efficient organic solar cells with high open-circuit voltage

“…Compared with fused-ring NFAs, UF-NFAs employ noncovalent conformational locks, such as O⋯S, N⋯S, and F⋯H interactions, to preserve the planarity of the molecular backbone, thereby improving molecular stacking and carrier mobility. 28,29 In recent years, some UF-NFAs with an A–D–A′–D–A structure have displayed excellent photovoltaic performance, indicating their substantial potential for constructing high-performance UF-NFAs. For example, Chen et al synthesized the UF-NFA DF-PCIC and adjusted halogenated terminal groups, achieving an optimal PCE of 10.14%.…”

The Application of Y Series Acceptor-Based Double-Cable Polymers in Single-Material Organic Solar Cells

“…Solution-processed organic photovoltaics (OPVs) have garnered significant attention from researchers due to their lightweight, low cost, and flexibility. − To overcome the low exciton separation efficiency caused by the substantially large binding energy of organic semiconductor materials, two or more different organic photovoltaic materials with electron-donating (donor, D) and electron-accepting (acceptor, A) properties are generally introduced in the active layer to form a bulk heterojunction (BHJ) . The energy-level difference at the interface of these D/A materials serves as the sufficient driving force for charge transfer, thus overcoming the exciton binding energy. , Despite advances in materials design strategies, − and devices engineering techniques, − resulting in the rapid development of multicomponent BHJ OPVs, , achieving satisfactory device stability, which is crucial for commercialization, remains a big challenge.…”

A facile synthetic approach based on thieno[3,4-c]pyrrole-4,6-dione to construct polymer donors for highly efficient organic solar cells

“…12–14 With significant breakthroughs in device efficiency and stability (or lifetime) in recent years, the cost factor, which is one of the golden triangle elements, still requires more effort to realize the commercial application of OSCs in domains, 15,16 such as the design and synthesis of low-cost photoactive materials, high-throughput fabrication of solar cells or modules, 17,18 and recycling of functional materials, 19 which can be useful to reduce the levelized cost of electricity. 20–22…”

“…Based on the abovementioned insights, many efforts and breakthroughs have been made in the development of low-cost active layer materials, such as non-fused ring small molecule acceptors (SMAs) 20,24,25 and polythiophene derivative donors. 26–28 However, the PCEs of the relevant OSC systems have rarely exceeded 17%, 29–32 while at the same time, the development of new and simple A-units combined with benzo[1,2- b :4,5- b ′]dithiophene–thiophene (BDT-T) derivatives to develop cost-efficient polymer donors ( P D s) has increasingly garnered attention as a viable alternative.…”