The interface defects and nickel vacancies of the NiO_(x)lead to interface charge recombination,which limits its application in perovskite solar cells.Here,graphdiyne oxide(GDYO)was added to NiO_(x)as an inorganic hol...The interface defects and nickel vacancies of the NiO_(x)lead to interface charge recombination,which limits its application in perovskite solar cells.Here,graphdiyne oxide(GDYO)was added to NiO_(x)as an inorganic hole transporting material.It is found that the average carrier lifetime declined from 29.2 ns to 5.4 ns and the recombination resistance increased significantly after the GDYO adding determined by the time-resolved photoluminescence and electrochemical impedance spectroscopy analysis.We further demonstrated that the GDYO adding to NiO_(x)effectively improved the charge extraction,accelerated the charge transportation and suppressed the charge recombination.Consequently,the optimized NiO_(x)(GDYO)-based cell showed superior performance with a higher fill factor(81.99%)and improved stability with respect to the reference device.This method provides a new method for property regulation of NiO_(x)in inverted planar MAPbI_(3) perovskite solar cells.展开更多
基金This work was supported by the National Natural Science Foundation of China(No.21975273)the Scientific Research Starting Foundation of Outstanding Young Scholar of Shandong University,Chinathe Fundamental Research Funds of Shandong University,China.
文摘The interface defects and nickel vacancies of the NiO_(x)lead to interface charge recombination,which limits its application in perovskite solar cells.Here,graphdiyne oxide(GDYO)was added to NiO_(x)as an inorganic hole transporting material.It is found that the average carrier lifetime declined from 29.2 ns to 5.4 ns and the recombination resistance increased significantly after the GDYO adding determined by the time-resolved photoluminescence and electrochemical impedance spectroscopy analysis.We further demonstrated that the GDYO adding to NiO_(x)effectively improved the charge extraction,accelerated the charge transportation and suppressed the charge recombination.Consequently,the optimized NiO_(x)(GDYO)-based cell showed superior performance with a higher fill factor(81.99%)and improved stability with respect to the reference device.This method provides a new method for property regulation of NiO_(x)in inverted planar MAPbI_(3) perovskite solar cells.
