The power conversion efficiencies(PCEs)of inverted perovskite solar cells(PSCs)have been enhanced by optimizing molecule-based hole-selective contact components[1,2].These components consist of self-assembled monolaye...The power conversion efficiencies(PCEs)of inverted perovskite solar cells(PSCs)have been enhanced by optimizing molecule-based hole-selective contact components[1,2].These components consist of self-assembled monolayers or multilayers featuring carbazole functional groups with phosphonic acid anchoring groups,which can be easily deposited over large areas of metal oxides,modify the work function of the substrate,and minimize optical and electrical losses while requiring less material[3].Despite their promise,achieving long-term stability in PSCs remains a critical challenge.In this context,extensive research has been directed toward the molecular design of these selective contact components[2].To date,hundreds of molecules based onπ-conjugated hydrocarbon structures have been developed,featuring conjugated cores containing heteroatoms such as nitrogen(N),sulfur(S),and oxygen(O).While these structures facilitate excellent electronic properties,maintaining the structural integrity of the hole-selective contact molecules beneath the perovskite layer under external stimuli remains difficult due to the inherent reactivity of the heteroatoms involved[4].展开更多
文摘The power conversion efficiencies(PCEs)of inverted perovskite solar cells(PSCs)have been enhanced by optimizing molecule-based hole-selective contact components[1,2].These components consist of self-assembled monolayers or multilayers featuring carbazole functional groups with phosphonic acid anchoring groups,which can be easily deposited over large areas of metal oxides,modify the work function of the substrate,and minimize optical and electrical losses while requiring less material[3].Despite their promise,achieving long-term stability in PSCs remains a critical challenge.In this context,extensive research has been directed toward the molecular design of these selective contact components[2].To date,hundreds of molecules based onπ-conjugated hydrocarbon structures have been developed,featuring conjugated cores containing heteroatoms such as nitrogen(N),sulfur(S),and oxygen(O).While these structures facilitate excellent electronic properties,maintaining the structural integrity of the hole-selective contact molecules beneath the perovskite layer under external stimuli remains difficult due to the inherent reactivity of the heteroatoms involved[4].
