Organic-inorganic hybrid materials with controllable physicochemical properties have played a great role in multifunctional sensors,photovoltaic cells,switching devices,etc.Among them,organic-inorganic hybrid dielectr...Organic-inorganic hybrid materials with controllable physicochemical properties have played a great role in multifunctional sensors,photovoltaic cells,switching devices,etc.Among them,organic-inorganic hybrid dielectric materials have become a hot research topic within current cross-frontier research.In order to unveil the effect of halogen ions on phase transitions,we synthesized three hybrids:(TMBPA)CdCl_(2)Br(TMBPA-ClBr,1),(TMBPA)_(2)CdBr_(4)(TMBPA-Br,2),and(TMIPA)_(2)CdI_(4)(TMIPA-I,3),(TMBPA=3-bromopropyltrimethylammonium,TMIPA=3-iodopropyltrimethylammonium).The phase-transition temperature of the three compounds increases with the size of the halogen ions from Cl-to I-.Interestingly,the three compounds exhibit consistent trends in dielectric and photoluminescence properties,and the corresponding photoluminescence lifetimes are calculated as 1.55 ns,1.28 ns,and 0.98 ns,expressing consistency with halogen regulation.This is very similar to the success of the cationic substitution of formamidinium/Cs/methylammonium lead iodide.Therefore,this work provides guidance for understanding the composition-structure-property relationship of organic-inorganic hybrid perovskites.展开更多
基金financially supported by the Natural Science Foundation of Zhejiang Province(LZ20B010001).
文摘Organic-inorganic hybrid materials with controllable physicochemical properties have played a great role in multifunctional sensors,photovoltaic cells,switching devices,etc.Among them,organic-inorganic hybrid dielectric materials have become a hot research topic within current cross-frontier research.In order to unveil the effect of halogen ions on phase transitions,we synthesized three hybrids:(TMBPA)CdCl_(2)Br(TMBPA-ClBr,1),(TMBPA)_(2)CdBr_(4)(TMBPA-Br,2),and(TMIPA)_(2)CdI_(4)(TMIPA-I,3),(TMBPA=3-bromopropyltrimethylammonium,TMIPA=3-iodopropyltrimethylammonium).The phase-transition temperature of the three compounds increases with the size of the halogen ions from Cl-to I-.Interestingly,the three compounds exhibit consistent trends in dielectric and photoluminescence properties,and the corresponding photoluminescence lifetimes are calculated as 1.55 ns,1.28 ns,and 0.98 ns,expressing consistency with halogen regulation.This is very similar to the success of the cationic substitution of formamidinium/Cs/methylammonium lead iodide.Therefore,this work provides guidance for understanding the composition-structure-property relationship of organic-inorganic hybrid perovskites.
