Amphiphilic methanofullerene 1 exhibits strong tendency to form aggregates in THFH2O solvent mixtures. Two different aggregation processes induced by either varying the solvent composition or upon standing have been ...Amphiphilic methanofullerene 1 exhibits strong tendency to form aggregates in THFH2O solvent mixtures. Two different aggregation processes induced by either varying the solvent composition or upon standing have been found. Concentration has great influence on the aggregation process. Paralleling to the UV-Vis changes, an unusual solvatochromism has been observed in these two different processes.展开更多
The solvent-free mechanochemical reaction and the liquid-phase reaction of C60 with ethyl 2-diazopropionate prepared in situ or preformed from alanine ethyl ester hydrochloride and sodium nitrite have been investigate...The solvent-free mechanochemical reaction and the liquid-phase reaction of C60 with ethyl 2-diazopropionate prepared in situ or preformed from alanine ethyl ester hydrochloride and sodium nitrite have been investigated. Methanofullerene 1 and fulleroids 2 and 3 from these reactions were obtained, meanwhile the pyrazoline intermediate was not observed. Fulleroids 2 and 3 can be converted to methanofullerene 1 in refluxing toluene.展开更多
In this study,two fullerenes(C60,C70)and their methano-substitutions(PC61BM,PC71BM),as electron transport materials(ETMs)in perovskite solar cells(Pero-SCs),were systematically studied.As being used as ETMs,methanoful...In this study,two fullerenes(C60,C70)and their methano-substitutions(PC61BM,PC71BM),as electron transport materials(ETMs)in perovskite solar cells(Pero-SCs),were systematically studied.As being used as ETMs,methanofullerenes,though with lower electron mobility compared to the counterpart pristine fullerenes,lead to higher power conversion efficiencies(PCEs)of Pero-SCs.The difference is likely caused by the fill-out vacancies and smoother morphology of the interfaces between ETM and perovskite layers,as they were prepared by different methods.In addition,compared to C60 and PC61BM,C70 and PC71BM showed priority in terms of short-circuit current density,which should be attributed to fast free charge extraction abilities.展开更多
A 54 -electron fullerene acceptor,indene bis-methano[60]fullerene(IBMF),having one indene and two sterically compact CH2 groups was developed.Using P3HT as donor,IBMF solar cells gave a PCE of 5.18%,which is higher th...A 54 -electron fullerene acceptor,indene bis-methano[60]fullerene(IBMF),having one indene and two sterically compact CH2 groups was developed.Using P3HT as donor,IBMF solar cells gave a PCE of 5.18%,which is higher than that for solar cells based on IC60TA,which has three indenes.The superior performance of IBMF solar cells originates from higher mobility of IBMF and better morphology for IBMF/P3HT blend films.展开更多
文摘Amphiphilic methanofullerene 1 exhibits strong tendency to form aggregates in THFH2O solvent mixtures. Two different aggregation processes induced by either varying the solvent composition or upon standing have been found. Concentration has great influence on the aggregation process. Paralleling to the UV-Vis changes, an unusual solvatochromism has been observed in these two different processes.
文摘The solvent-free mechanochemical reaction and the liquid-phase reaction of C60 with ethyl 2-diazopropionate prepared in situ or preformed from alanine ethyl ester hydrochloride and sodium nitrite have been investigated. Methanofullerene 1 and fulleroids 2 and 3 from these reactions were obtained, meanwhile the pyrazoline intermediate was not observed. Fulleroids 2 and 3 can be converted to methanofullerene 1 in refluxing toluene.
基金the National Natural Science Foundation of China(51303118,91333204)the Natural Science Foundation of Jiangsu Province(BK20130289)+3 种基金the Ph.D.Programs Foundation of Ministry of Education of China(20133201120008)the Priority Academic Program Development of Jiangsu Higher Education Institutionsthe Scientific Research Foundation for Returned Scholars,Ministry of Education of ChinaBeijing National Laboratory for Molecular Sciences,State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
文摘In this study,two fullerenes(C60,C70)and their methano-substitutions(PC61BM,PC71BM),as electron transport materials(ETMs)in perovskite solar cells(Pero-SCs),were systematically studied.As being used as ETMs,methanofullerenes,though with lower electron mobility compared to the counterpart pristine fullerenes,lead to higher power conversion efficiencies(PCEs)of Pero-SCs.The difference is likely caused by the fill-out vacancies and smoother morphology of the interfaces between ETM and perovskite layers,as they were prepared by different methods.In addition,compared to C60 and PC61BM,C70 and PC71BM showed priority in terms of short-circuit current density,which should be attributed to fast free charge extraction abilities.
基金supported by the"100 Talents Program"of the Chinese Academy of Sciencesthe National Natural Science Foundation of China(21374025,21372053,and 21102028)
文摘A 54 -electron fullerene acceptor,indene bis-methano[60]fullerene(IBMF),having one indene and two sterically compact CH2 groups was developed.Using P3HT as donor,IBMF solar cells gave a PCE of 5.18%,which is higher than that for solar cells based on IC60TA,which has three indenes.The superior performance of IBMF solar cells originates from higher mobility of IBMF and better morphology for IBMF/P3HT blend films.
