Abstract
This work highlights recent advancements in how the structures and chemical makeups of the active layer materials affect photovoltaic processes and performance in terms of power conversion efficiency and stability. It further sheds light on the performance optimization of organic photovoltaic cell (OPV) and the relationship between these optimization conditions and OPVs performance. The use of different substituents on the same donor or acceptor material has different optimal conditions. Furthermore, it is shown that the addition of different third components in the active layer has different optimal concentration points. This review also highlights and suggests a possible way to improve the stability of OPV through modification of the active layer. To date, some studies showed that incorporation of the third component in the active layer leads to over 97% stability after more than 1000 h.
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