The contact between mental oxide electron transport layer(ETL) and active layer is one of the key factors affecting the performance of polymer solar cells(PSCs). To achieve better lattice matching and fewer defects in...
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The contact between mental oxide electron transport layer(ETL) and active layer is one of the key factors affecting the performance of polymer solar cells(PSCs). To achieve better lattice matching and fewer defects indium trioxide(InO) and zinc oxide(ZnO)(InO/ZnO) are employed as the inorganic composite ETL, combinating with a hydrophilic material PCBM as interface layer to achieve homogeneous phase separation for active layer. The resulting device demonstrates a high fill factor of 69.83% and power conversion efficiency of 9.036% for PTB7:PCBM based device. Moreover, the acceptor of material PCBM as interface layer can interact with donor materials of active layer to promote the exciton dissociation. This study provides a new method to improve the performance of PSCs by using multi-functional cascade electron transport layers.
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