Graphdiyne(GDY)-based nanomaterials are a novel class of two-dimensional carbon structures characterized by a distinctive arrangement of sp-and sp?-hybridized carbon atoms that have garnered significant interest becau...Graphdiyne(GDY)-based nanomaterials are a novel class of two-dimensional carbon structures characterized by a distinctive arrangement of sp-and sp?-hybridized carbon atoms that have garnered significant interest because of their unique properties.The presence of alkyne linkages in these materials leads to a highly conjugated system with uniform pores,offering a plethora of opportunities in diverse technological applications.This review delves into the intrinsic properties of GDY,including its electronic,mechanical,and optical characteristics,which are pivotal for its biomedical utility in fields such as sensing and detection,bio-imaging,tumor therapy,drug deliv-ery,and antibacterial treatments.Despite these promising attributes,the field faces ongoing challenges,including a deeper comprehension of the formation mechanisms,development of scalable synthesis routes for single-or few-layer GDY sheets,and thorough investigation of the basic physical and chemical properties.This paper high-lights the existing applications of GDY-based nanomaterials in nanotechnology and identifies the critical research directions necessary for harnessing the full potential of this emerging material.展开更多
Monomers with low symmetries can form different topological structures in the preparation of organic two-dimensional(2D)materials.However,it remains challenging to modulate the topologies in practical synthesis.Levera...Monomers with low symmetries can form different topological structures in the preparation of organic two-dimensional(2D)materials.However,it remains challenging to modulate the topologies in practical synthesis.Leveraging theoretical insights into the formation energy of potential structural configurations,we report the topology modulation of a graphdiyne(GDY)derivative constructed from two-fold symmetric tetrakis(4-ethynylphenyl)ethene precursor by changing solvent combinations in a liquid-liquid interfacial system.An aqueous-organic(water-dichloromethane)interface afforded GDY with a kagome topology while a rhombic topology was formed at an organic-organic(hexane-acetonitrile)interface.A comprehensive evaluation of their structures and optoelectronic properties was conducted through various characterization techniques and theoretical computations.Our study provided new insights to modulate the topology of not only GDY but also other framework structures and obtain topologically pure materials in situations where different topologies are possible during practical synthesis.展开更多
Detrimental defects on perovskite grain boundaries(GBs)are critical factors that lead to non-radiative recombination and hysteresis.In this work,triazine-graphdiyne(Tra-GD),a nitrogen-rich two-dimensional(2 D)material...Detrimental defects on perovskite grain boundaries(GBs)are critical factors that lead to non-radiative recombination and hysteresis.In this work,triazine-graphdiyne(Tra-GD),a nitrogen-rich two-dimensional(2 D)material,was incorporated into the active layer of perovskite to modify the GBs.Tra-GD was found to distribute evenly over the bulk of the perovskite and has a strong interaction with the Pb^2+ exposed at GBs,which enables it to effectively passivate GB defects and prevent ion migration.The results of Kelvin probe force microscopy and photoluminescence studies proved that the highly conjugated Tra-GD located at GBs could promote charge extraction and transport.Benefiting from defect passivation and more efficient carrier transport,the Tra-GD based device showed less non-radiative recombination loss.Consequently,the resultant device presented negligible hysteresis and yielded a high power conversion efficiency(PCE)of 20.33%in the MAPbI3-based perovskite solar cell.This approach was extended to the FAPbI3 system with a PCE of 21.16%.Our Tra-GD passivation strategy provides a useful approach to effectively improving the device performance and addressing hysteresis issues.展开更多
基金supported by the National Key Research and Development Program of China(No.2024YFA1210004)Basic Science Center Project of the National Natural Science Foundation of China(22388101)+2 种基金New Cornerstone Science Foundation,National Natural Science Foundation of China(T242200557,32171398)Beijing Nova Program(20220484060,20230484426)Hundred-Talent Program of the Chinese Academy of Sciences.
文摘Graphdiyne(GDY)-based nanomaterials are a novel class of two-dimensional carbon structures characterized by a distinctive arrangement of sp-and sp?-hybridized carbon atoms that have garnered significant interest because of their unique properties.The presence of alkyne linkages in these materials leads to a highly conjugated system with uniform pores,offering a plethora of opportunities in diverse technological applications.This review delves into the intrinsic properties of GDY,including its electronic,mechanical,and optical characteristics,which are pivotal for its biomedical utility in fields such as sensing and detection,bio-imaging,tumor therapy,drug deliv-ery,and antibacterial treatments.Despite these promising attributes,the field faces ongoing challenges,including a deeper comprehension of the formation mechanisms,development of scalable synthesis routes for single-or few-layer GDY sheets,and thorough investigation of the basic physical and chemical properties.This paper high-lights the existing applications of GDY-based nanomaterials in nanotechnology and identifies the critical research directions necessary for harnessing the full potential of this emerging material.
基金This research is supported by A*STAR(Nos.C233312013 and 222D800034).
文摘Monomers with low symmetries can form different topological structures in the preparation of organic two-dimensional(2D)materials.However,it remains challenging to modulate the topologies in practical synthesis.Leveraging theoretical insights into the formation energy of potential structural configurations,we report the topology modulation of a graphdiyne(GDY)derivative constructed from two-fold symmetric tetrakis(4-ethynylphenyl)ethene precursor by changing solvent combinations in a liquid-liquid interfacial system.An aqueous-organic(water-dichloromethane)interface afforded GDY with a kagome topology while a rhombic topology was formed at an organic-organic(hexane-acetonitrile)interface.A comprehensive evaluation of their structures and optoelectronic properties was conducted through various characterization techniques and theoretical computations.Our study provided new insights to modulate the topology of not only GDY but also other framework structures and obtain topologically pure materials in situations where different topologies are possible during practical synthesis.
基金supported by the Natural Science Foundation of China(51672288 and 21975273)Taishan Scholars Program of Shandong Province+2 种基金Youth Innovation Promotion Association of Chinese Academy of Sciences,Dalian National Laboratory for Clean Energy(DICP QIBEBT UN201705)Scientific Research Cooperation Foundation of Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciencesthe support of Qingdao Postdoctoral Application Research Project(2018183 and 2018186)。
文摘Detrimental defects on perovskite grain boundaries(GBs)are critical factors that lead to non-radiative recombination and hysteresis.In this work,triazine-graphdiyne(Tra-GD),a nitrogen-rich two-dimensional(2 D)material,was incorporated into the active layer of perovskite to modify the GBs.Tra-GD was found to distribute evenly over the bulk of the perovskite and has a strong interaction with the Pb^2+ exposed at GBs,which enables it to effectively passivate GB defects and prevent ion migration.The results of Kelvin probe force microscopy and photoluminescence studies proved that the highly conjugated Tra-GD located at GBs could promote charge extraction and transport.Benefiting from defect passivation and more efficient carrier transport,the Tra-GD based device showed less non-radiative recombination loss.Consequently,the resultant device presented negligible hysteresis and yielded a high power conversion efficiency(PCE)of 20.33%in the MAPbI3-based perovskite solar cell.This approach was extended to the FAPbI3 system with a PCE of 21.16%.Our Tra-GD passivation strategy provides a useful approach to effectively improving the device performance and addressing hysteresis issues.
