Organic solar cells (OSCs) have attracted huge research interests recently because of their low-cost fabrication at low temperatures through chemical technologies. However, even after over two decades of their introduction, OSCs are yet to achieve efficiency and stability comparable to their inorganic counterparts, such as crystalline silicon solar cells. This poor performance is a result of the low absorption coefficient and instability of fullerene derivatives which are the most used acceptor materials in organic solar cells. Less than a decade ago, new polymer non-fullerene-based acceptors such as Naphthalene diimide (NDI) and Perylene diimide (PDI) have been proposed as suitable replacements to the fullerene acceptors. This has resulted in the fabrication of all polymer solar cells (PSCs) which exhibit relatively more stable performance than the fullerene based OSCs. PSCs even though have efficient photon absorption occurring in both the donor and acceptor materials, they still have low fill factor (FF). This ultimately reduces their power conversion efficiency (PCE). Thus, an urgent need exists for research into PSCs to enhance their PCE and stability leading to commercialisation.
|Effective start/end date||20/03/20 → …|
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