The metal complexation reactions of bis(hexafluoroacetylacetonato)copper(II)(Cu(hfac)2)with alkoxyamines(diethyl(2,2-dimethyl-1-(tert-butyl-(1-(pyridine-4-yl)ethoxy)amino)propyl)phosphonate and diethyl(2,2-dimethyl-1-...The metal complexation reactions of bis(hexafluoroacetylacetonato)copper(II)(Cu(hfac)2)with alkoxyamines(diethyl(2,2-dimethyl-1-(tert-butyl-(1-(pyridine-4-yl)ethoxy)amino)propyl)phosphonate and diethyl(2,2-dimethyl-1-(tert-butyl-(1-(pyridine-2-yl)ethoxy)amino)propyl)phosphonate)were studied.According to X-ray analysis,the molecular and crystal structures of 1:1 complexes depend on the configuration of the free alkoxyamines,that is dimeric(RSSR)and chain-polymeric(RR/SS)structures for para-pyridylsubstituted alkoxyamines,and cyclic unimeric(RS/SR)structure for ortho-pyridyl derivative.展开更多
White-light emission in lead halide hybrid perovskites has attracted increasing attention due to their significant applications in the field of light-emitting devices.Despite tremendous efforts,two-dimensional (2D) wh...White-light emission in lead halide hybrid perovskites has attracted increasing attention due to their significant applications in the field of light-emitting devices.Despite tremendous efforts,two-dimensional (2D) white-light emissive perovskites with high photoluminescence quantum efficiency (PLQE) remain scarce.In this work,by using alkoxyamine organic cations as a template,we successfully synthesized a new 2D layered hybrid perovskite,(γ-methoxy propyl amine)2PbBr4 (γ-MPAPB),which exhibits bright bluish white-light emission with an excellent color rendering index (CRI) of 85 and a high PLQE of 6.85%.Photoluminescence measurements show a correlation between self-trapped excitons and white-light emission.To the best of our knowledge,this is the first demonstration of a 2D hybrid perovskite with efficient white-light emission based on alkoxyamine cations.This work emphasizes the strategy of introducing alkoxyamine cations into 2D layered hybrid perovskites to design efficient white-light emissive perovskite semiconductors.展开更多
基金Aix-Marseille Université,CNRS,ANR(grant NAR ANR-14-CE16-0023-01)the A*MIDEX project(ANR-11-IDEX-0001-02)funded by the“Investissements d’Avenir”French Government program,managed by the French National Research Agency(ANR).SRAM,ME,DP,ET and SZ are grateful to the Russian Science Foundation(grant 15-13-2020)for supporting this work and to the Multi-Access Chemical Service Center SB RAS for spectral and analytical measurements.
文摘The metal complexation reactions of bis(hexafluoroacetylacetonato)copper(II)(Cu(hfac)2)with alkoxyamines(diethyl(2,2-dimethyl-1-(tert-butyl-(1-(pyridine-4-yl)ethoxy)amino)propyl)phosphonate and diethyl(2,2-dimethyl-1-(tert-butyl-(1-(pyridine-2-yl)ethoxy)amino)propyl)phosphonate)were studied.According to X-ray analysis,the molecular and crystal structures of 1:1 complexes depend on the configuration of the free alkoxyamines,that is dimeric(RSSR)and chain-polymeric(RR/SS)structures for para-pyridylsubstituted alkoxyamines,and cyclic unimeric(RS/SR)structure for ortho-pyridyl derivative.
基金supported by the National Natural Science Foundation of China(21833010,21861014,21525104,21875251,21971238,21975258,61975207 and 21921001)the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(ZDBS-LY-SLH024)+1 种基金the NSF of Fujian Province(2018H0047),the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB20010200)the Youth Innovation Promotion of CAS(2019301 and 2020307).
文摘White-light emission in lead halide hybrid perovskites has attracted increasing attention due to their significant applications in the field of light-emitting devices.Despite tremendous efforts,two-dimensional (2D) white-light emissive perovskites with high photoluminescence quantum efficiency (PLQE) remain scarce.In this work,by using alkoxyamine organic cations as a template,we successfully synthesized a new 2D layered hybrid perovskite,(γ-methoxy propyl amine)2PbBr4 (γ-MPAPB),which exhibits bright bluish white-light emission with an excellent color rendering index (CRI) of 85 and a high PLQE of 6.85%.Photoluminescence measurements show a correlation between self-trapped excitons and white-light emission.To the best of our knowledge,this is the first demonstration of a 2D hybrid perovskite with efficient white-light emission based on alkoxyamine cations.This work emphasizes the strategy of introducing alkoxyamine cations into 2D layered hybrid perovskites to design efficient white-light emissive perovskite semiconductors.
