Non-fullerence acceptors (NFAs) are widely considered to be a viable alternative to fullerene acceptors for organic solar cells.
Since the discovery of ITIC in 2015, a great deal of focus has been given to non-fullerene acceptor molecules and the development of efficient bulk-heterojunction organic solar cells (OSCs). To a large extent, non-fullerene acceptors have taken the spotlight in this area away from Phenyl-C81-Butyric Acid Methyl Esters (PCBMs) and other fullerene derivatives.
With record organic solar cells power conversion efficiencies of over 17% now been achieved with non-fullerence acceptor based devices, the performance of such devices has now overtaken that of their fullerene-based cousins. Such devices also boast longer device lifetimes and better thermal and photochemical stability.
Despite the renewed interest in non-fullerene acceptors, however, more research is needed before non-fullerene organic solar cells (NFOSCs) can be created with efficiencies that rival those of inorganic devices.
As research gathers pace, the first OPV cells with efficiencies in excess of 20% could be on the horizon. This would represent a significant break-through and has only recently become a realistic prospect. Given the progress that has been made since 2015, there is every reason to be excited about the future of this field.
We supply a range of the most promising n-type non-fullerene acceptors, including ITIC, N3, TPT10, Y6 and Y7. We have a collection of intermediates and monomers available for the synthesis of such ITIC non-fullerene acceptors. Our range currently includes 2HIC, 2FIC, 2ClIC, IDTB6-2CHO and IDTTB6-2CHO. Please contact us if you can't find what you are looking for.
Historically speaking, fullerene derivatives like PCBM have been the most widely used electron acceptors in organic photovoltaic (OPV) cells. Unfortunately, although they out-perform most non-fullerene alternatives, fullerene derivates have some significant shortcomings that limit their performance in photovoltaic applications. These include weak light absorption, limited variability of electronic properties, and morphology instability. As a result of these drawbacks it has proven difficult to obtain high power conversion efficiencies (PCEs) using these materials. By using non-fullerene materials as electron acceptors, it has been possible to overcome some of the limitations of fullerene acceptors.
The discovery of the ITIC molecule in 2015 brought about the first serious challenge to the role of fullerenes as acceptors in polymer solar cells. With a greater degree of flexibility to tune the optical properties and electronic energy levels, ITIC based organic solar cells offer greater thermal and photochemical stability, longer device lifetimes, and higher power conversion efficiencies.small molecule non-fullerene acceptors (NFAs) have been the subject of considerable interest in academic and industrial research fields. In addition, n-type non-fullerene acceptors have great flexibility in synthesis due to their multiple functional groups. These molecules have the potential to overcome the difficulties of tuning energy levels, poor absorption of visible light, and the inherent tendency of fullerenes to easily aggregate. Solving these problems is crucial to the development of polymer photovoltaics.