Carbon-based HTM-free perovskite solar cells(C-PSCs)have received extensive attention due to their low cost and high stability.However,some issues with regard to their relatively low efficiency and toxicity still need...Carbon-based HTM-free perovskite solar cells(C-PSCs)have received extensive attention due to their low cost and high stability.However,some issues with regard to their relatively low efficiency and toxicity still need to be addressed before their commercialization.For the first time,a high-efficiency carbonbased planar perovskite solar cell was prepared based on TiO_(2)combined with PC_(61)BM as the electrontransport layer.PC_(61)BM could passivate the interface between the perovskite film layer and the TiO_(2)film layer;at the same time,it also exhibited the function of an additive to improve the crystal quality of the perovskite.Planar C-PSC was successfully fabricated with an open voltage(Voc)of 1.005 V,which represented~2.6%enhancement compared to that of the device with a mesoporous structure,and power conversion efficiency(PCE)of 14.37%.Moreover,stability was also investigated;3%degradation appeared in the PCE of the planar C-PSC after being stored for 1900 h in the dark.This methodology of introducing PC_(61)BM to reduce the recombination probability of electrons and holes and improve the crystal quality of perovskites has universal significance for the further development of planar C-PSCs.展开更多
基金supported by the National Natural Science Foundation of China(No.51572025)the National Foundation of China(No.41422050303)+1 种基金the Program of Introducing Talents of Discipline to Universities(B14003the Beijing Municipal Science&Technology Commission and the Fundamental Research Funds for Central Universities.
文摘Carbon-based HTM-free perovskite solar cells(C-PSCs)have received extensive attention due to their low cost and high stability.However,some issues with regard to their relatively low efficiency and toxicity still need to be addressed before their commercialization.For the first time,a high-efficiency carbonbased planar perovskite solar cell was prepared based on TiO_(2)combined with PC_(61)BM as the electrontransport layer.PC_(61)BM could passivate the interface between the perovskite film layer and the TiO_(2)film layer;at the same time,it also exhibited the function of an additive to improve the crystal quality of the perovskite.Planar C-PSC was successfully fabricated with an open voltage(Voc)of 1.005 V,which represented~2.6%enhancement compared to that of the device with a mesoporous structure,and power conversion efficiency(PCE)of 14.37%.Moreover,stability was also investigated;3%degradation appeared in the PCE of the planar C-PSC after being stored for 1900 h in the dark.This methodology of introducing PC_(61)BM to reduce the recombination probability of electrons and holes and improve the crystal quality of perovskites has universal significance for the further development of planar C-PSCs.
