In this paper,the superhydrophobic poly(vinylidene fuoride)/fuorinated ethylene propylene/SiO_(2)/CNTs-EDTA(PFSCEDTA)composite coating was successfully fabricated and applied for anti-scaling performance.The depositio...In this paper,the superhydrophobic poly(vinylidene fuoride)/fuorinated ethylene propylene/SiO_(2)/CNTs-EDTA(PFSCEDTA)composite coating was successfully fabricated and applied for anti-scaling performance.The deposition of CaCO_(3) on the surface of the superhydrophobic PFSC-EDTA composite coating reached 0.0444 mg/cm^(2) for 192-h immersion into the supersaturated CaCO_(3) solution,which was only 11.4%that of the superhydrophobic PFSC composite coating.At the interface between the CaCO_(3) solution and the PFSC-EDTA coating,the Ca^(2+)could be frstly chelated by EDTA that was beneft for improving the anti-scaling performance of the superhydrophobic PFSC-EDTA composite coating.In another hand,the addition of EDTA to the CNTs played an important role in fabricating the SiO_(2)-centric and CNTs-EDTA-surrounded multilevel micro-nanostructure in the superhydrophobic PFSC-EDTA composite coating,in favor of maintaining the air flm under the water and the stability of the superhydrophobic surface.The research supplies a new way of improving antiscaling performance of superhydrophobic coating by incorporating the organic chelating agent at the interface and changing the traditional way of scale prevention.展开更多
Electron transport layer(ETL)is very critical to the performance of perovskite solar cells(PSCs),and optimization work on ETL has received extensive attentions especially on tin oxide(SnO_(2))since it is an excellent ...Electron transport layer(ETL)is very critical to the performance of perovskite solar cells(PSCs),and optimization work on ETL has received extensive attentions especially on tin oxide(SnO_(2))since it is an excellent ETL material widely applied in high-efficiency PSCs.Thereinto,introducing mesoporous structure and surface modification are two important approaches which are commonly applied.Herein,based on the previous work in low-temperature fabrication process of mesoporous SnO_(2)(mSnO_(2)),we introduced a modification process with rubidium fuoride(Rb F)to the m-SnO_(2)ETL,and successfully achieved a synergy of the m-SnO_(2)and Rb F modification:not only the shortcoming of the m-SnO_(2)in interfacial traps was overcome,but also the carrier collection efficiency was further improved.The PSCs based on the m-SnO_(2)ETL with Rb F modification demonstrated outstanding performances:a champion power conversion efficiency(PCE)of 22.72%and a stability performance of maintaining 90%of the initial PCE after 300 h of MPP tracking were obtained without surface passivation of perovskite film.Hence,utilizing the abovementioned synergy is a cost-effective and feasible strategy for fabricating high-efficiency and stable PSCs since the fabrication process of the m-SnO_(2)ETL is a kind of low temperature process and RbF is cheap.展开更多
基金The research was fnancially supported by the National Science Foundation for Distinguished Young Scholars of China(Grant No.51925403)the Major Research Plan of National Natural Science Foundation of China(Grant No.91934302)the National Science Foundation of China(21676052,21606042).
文摘In this paper,the superhydrophobic poly(vinylidene fuoride)/fuorinated ethylene propylene/SiO_(2)/CNTs-EDTA(PFSCEDTA)composite coating was successfully fabricated and applied for anti-scaling performance.The deposition of CaCO_(3) on the surface of the superhydrophobic PFSC-EDTA composite coating reached 0.0444 mg/cm^(2) for 192-h immersion into the supersaturated CaCO_(3) solution,which was only 11.4%that of the superhydrophobic PFSC composite coating.At the interface between the CaCO_(3) solution and the PFSC-EDTA coating,the Ca^(2+)could be frstly chelated by EDTA that was beneft for improving the anti-scaling performance of the superhydrophobic PFSC-EDTA composite coating.In another hand,the addition of EDTA to the CNTs played an important role in fabricating the SiO_(2)-centric and CNTs-EDTA-surrounded multilevel micro-nanostructure in the superhydrophobic PFSC-EDTA composite coating,in favor of maintaining the air flm under the water and the stability of the superhydrophobic surface.The research supplies a new way of improving antiscaling performance of superhydrophobic coating by incorporating the organic chelating agent at the interface and changing the traditional way of scale prevention.
基金mainly supported by the operational funds of Institute of Photovoltaic,Southwest Petroleum University and Sichuan Science and Technology Program(2018JY0015)。
文摘Electron transport layer(ETL)is very critical to the performance of perovskite solar cells(PSCs),and optimization work on ETL has received extensive attentions especially on tin oxide(SnO_(2))since it is an excellent ETL material widely applied in high-efficiency PSCs.Thereinto,introducing mesoporous structure and surface modification are two important approaches which are commonly applied.Herein,based on the previous work in low-temperature fabrication process of mesoporous SnO_(2)(mSnO_(2)),we introduced a modification process with rubidium fuoride(Rb F)to the m-SnO_(2)ETL,and successfully achieved a synergy of the m-SnO_(2)and Rb F modification:not only the shortcoming of the m-SnO_(2)in interfacial traps was overcome,but also the carrier collection efficiency was further improved.The PSCs based on the m-SnO_(2)ETL with Rb F modification demonstrated outstanding performances:a champion power conversion efficiency(PCE)of 22.72%and a stability performance of maintaining 90%of the initial PCE after 300 h of MPP tracking were obtained without surface passivation of perovskite film.Hence,utilizing the abovementioned synergy is a cost-effective and feasible strategy for fabricating high-efficiency and stable PSCs since the fabrication process of the m-SnO_(2)ETL is a kind of low temperature process and RbF is cheap.
