Preparation of bauxite-based sintered mullite homogenized grog was introduced and its application in ladle castable was studied.Two kinds of bauxite-based sintered mullite homogenized grogs were used,named as GA and G...Preparation of bauxite-based sintered mullite homogenized grog was introduced and its application in ladle castable was studied.Two kinds of bauxite-based sintered mullite homogenized grogs were used,named as GA and GB,respectively.The results show that bauxitebased sintered homogenized grog with uniform components,stable microstructure and mullite as main crystal phase can be prepared using joint process of three-step homogenization,automatic component batching,wet cogrinding,high-temperature calcinations.It also indicates that carbon steel ladle castables with GA or composite aggregate of GA and GB as main materials have the same excellent general performance indicators,great erosion resistance,anti-strip performance and longer service life in field applications,and compared with castables with single aggregate of GA,the castables with aggregate of GA and GB as main materials had higher cost performance because of lower bulk density of GB.展开更多
The strong aggregation tendency of hole transport material poly[3-(4-carboxylbutyl)thiophene-K(P3CT-K)restricts its further application in inverted perovskite solar cells(PSCs).Here,we report an effective strategy to ...The strong aggregation tendency of hole transport material poly[3-(4-carboxylbutyl)thiophene-K(P3CT-K)restricts its further application in inverted perovskite solar cells(PSCs).Here,we report an effective strategy to address this issue and achieve the superior performance of inverted methylammonium lead triiodide(MAPbI3)PSCs,in which graphdiyne oxide(GDYO)doped P3CT-K nanocomposites are applied as the hole transport nanolayer(HTL).It is revealed that the strongπ–πstacking interaction occurs between GDYO and P3CT-K,which is proved by the blue shift of the absorption peak of P3CT-K nanolayer.The aggregation control via GDYO contributes to the property improvement of P3CT-K HTL.Moreover,the homogeneous coverage induces the growth of perovskite grain with larger size than that based on the undoped one.As a result,the optimized surface morphology,enhanced conductivity,charge extraction as well as better crystal quality,finally improve the device performance.An optimal power conversion efficiency of 19.06%is achieved,with simultaneously improved fill factor and short circuit current density.This work presents the potential of functional graphdiyne(GDY)in the development of highly efficient photovoltaic device.展开更多
The aggregation of cyanine-based fluorescent dyes easily results in the fluorescence quenching,which limits the applications in biological science and materials science.So developing an efficient method to adjust the ...The aggregation of cyanine-based fluorescent dyes easily results in the fluorescence quenching,which limits the applications in biological science and materials science.So developing an efficient method to adjust the aggregation of cyanine dyes is very significant.In this work,we employ two different macrocyclic hosts pillar[6]arene(DEP[6])and cucurbit[7]uril(CB[7])to investigate their effects towards fluorescence spectra of dye 1.The result indicates that both of them can disrupt the aggregation of dye 1,resulting in the enhancement of its fluorescence intensity.Interestingly,investigation on the corresponding titration experiments of 1H NMR and density functional theory cal-culations shows that CB[7]and DEP[6]play different roles in the process of disaggregation.展开更多
Polythiophenes(PTs)are prospective polymer donors for large-scale manufacturing and industrialization owing to their simple structures and low synthetic cost.However,the fabrication of PT solar cells depends on highly...Polythiophenes(PTs)are prospective polymer donors for large-scale manufacturing and industrialization owing to their simple structures and low synthetic cost.However,the fabrication of PT solar cells depends on highly toxic chlorinated solvents,and less research has been done on the use of more environmentally friendly non-halogenated solvents.Herein,highly efficient PT solar cells based on top-performance polythiophene,P5TCN-F25,processed from a non-halogenated solvent are reported by delicate aggregation control.A power conversion efficiency of up to 15.68%was achieved by depositing the active layer from a hot o-xylene solution,which is the record efficiency of non-halogenated processed PT solar cells up to date.The appropriate solution temperature is beneficial to the formation of ordered polymer stacking and desirable phase separation size,which thereby contributes to enhanced charge transfer efficiency,more balanced hole/electron mobility,and reduced trap-assisted recombination.These results provide valuable implications for improving the efficiency of PT solar cells via environmentallyfriendly processing.展开更多
文摘Preparation of bauxite-based sintered mullite homogenized grog was introduced and its application in ladle castable was studied.Two kinds of bauxite-based sintered mullite homogenized grogs were used,named as GA and GB,respectively.The results show that bauxitebased sintered homogenized grog with uniform components,stable microstructure and mullite as main crystal phase can be prepared using joint process of three-step homogenization,automatic component batching,wet cogrinding,high-temperature calcinations.It also indicates that carbon steel ladle castables with GA or composite aggregate of GA and GB as main materials have the same excellent general performance indicators,great erosion resistance,anti-strip performance and longer service life in field applications,and compared with castables with single aggregate of GA,the castables with aggregate of GA and GB as main materials had higher cost performance because of lower bulk density of GB.
基金supported by the National Natural Science Foundation of China(No.21975273)Scientific Research Starting Foundation of Outstanding Young Scholar of Shandong University,and the Fundamental Research Funds of Shandong University+2 种基金We thank Guangdong Basic and Applied Basic Research Foundation(No.2019A1515012156)2020 Li Ka Shing Foundation Cross Disciplinary Research Grant(No.2020LKSFG01A)Department of Education of Guangdong Province(Nos.2021LSYS009 and 2021KCXTD032).
文摘The strong aggregation tendency of hole transport material poly[3-(4-carboxylbutyl)thiophene-K(P3CT-K)restricts its further application in inverted perovskite solar cells(PSCs).Here,we report an effective strategy to address this issue and achieve the superior performance of inverted methylammonium lead triiodide(MAPbI3)PSCs,in which graphdiyne oxide(GDYO)doped P3CT-K nanocomposites are applied as the hole transport nanolayer(HTL).It is revealed that the strongπ–πstacking interaction occurs between GDYO and P3CT-K,which is proved by the blue shift of the absorption peak of P3CT-K nanolayer.The aggregation control via GDYO contributes to the property improvement of P3CT-K HTL.Moreover,the homogeneous coverage induces the growth of perovskite grain with larger size than that based on the undoped one.As a result,the optimized surface morphology,enhanced conductivity,charge extraction as well as better crystal quality,finally improve the device performance.An optimal power conversion efficiency of 19.06%is achieved,with simultaneously improved fill factor and short circuit current density.This work presents the potential of functional graphdiyne(GDY)in the development of highly efficient photovoltaic device.
基金support from Na-tional Natural Science Foundation of China(21272088,21472059,21402057)the Scientific Research Founda-tion for the Returned Overseas Chinese Scholars,Min-istry of Education and the self-determined research funds of CCNU from the colleges’basic research and operation of MOE(CCNU14A05009,CCNU14F01003).
文摘The aggregation of cyanine-based fluorescent dyes easily results in the fluorescence quenching,which limits the applications in biological science and materials science.So developing an efficient method to adjust the aggregation of cyanine dyes is very significant.In this work,we employ two different macrocyclic hosts pillar[6]arene(DEP[6])and cucurbit[7]uril(CB[7])to investigate their effects towards fluorescence spectra of dye 1.The result indicates that both of them can disrupt the aggregation of dye 1,resulting in the enhancement of its fluorescence intensity.Interestingly,investigation on the corresponding titration experiments of 1H NMR and density functional theory cal-culations shows that CB[7]and DEP[6]play different roles in the process of disaggregation.
基金supported by the Guangdong Basic and Applied Basic Research Foundation(2022B1515120008)the Guangdong Innovative and Entrepreneurial Research Team Program(2019ZT08L075)+1 种基金the National Natural Science Foundation of China(22275058,U20A6002)supported by the National Research Foundation of the Republic of Korea(NRF)grant funded by the Republic of Korea Government(MSIP)(2021R1A2C3004202)。
文摘Polythiophenes(PTs)are prospective polymer donors for large-scale manufacturing and industrialization owing to their simple structures and low synthetic cost.However,the fabrication of PT solar cells depends on highly toxic chlorinated solvents,and less research has been done on the use of more environmentally friendly non-halogenated solvents.Herein,highly efficient PT solar cells based on top-performance polythiophene,P5TCN-F25,processed from a non-halogenated solvent are reported by delicate aggregation control.A power conversion efficiency of up to 15.68%was achieved by depositing the active layer from a hot o-xylene solution,which is the record efficiency of non-halogenated processed PT solar cells up to date.The appropriate solution temperature is beneficial to the formation of ordered polymer stacking and desirable phase separation size,which thereby contributes to enhanced charge transfer efficiency,more balanced hole/electron mobility,and reduced trap-assisted recombination.These results provide valuable implications for improving the efficiency of PT solar cells via environmentallyfriendly processing.