Chiral organic-inorganic hybrid halides show significant potential for applications in circularly polarized photodetection,chiral-induced spin selectivity effects(CISS),and nonlinear optics.However,the widespread use ...Chiral organic-inorganic hybrid halides show significant potential for applications in circularly polarized photodetection,chiral-induced spin selectivity effects(CISS),and nonlinear optics.However,the widespread use of toxic lead element poses environmental concerns,hindering the further applications.Herein,we synthesized a zero-dimensional(0D)lead-free chiral antimony-based halide(R/S-MBA)_(4)Sb_(2)Br_(10)with the coexistence of polarity and crystallographic chirality.The halides exhibit unique magneto-chiroptical effects due to the field-effect-induced fine-tuning of exciton energy,which is the first observation in chiral antimony-based halides.Furthermore,owing to its significant spontaneous polarization(5.0μC/cm^(2))and optical chirality(g_(CD)=0.0018),(R/S-MBA)_(4)Sb_(2)Br_(10)halide exhibits excellent performance in self-powered circularly polarized photodetection,nonlinear optics,and CISS effects.The self-powered photodetector demonstrates high sensitivity with distinguishable factors(g_(res)=0.53/-0.51@0 V)and broad spectral response.The single crystal(R/S-MBA)_(4)Sb_(2)Br_(10)also exhibits a high second-harmonic polarization response asymmetry factor(g_(SHG-CD)=0.98/-0.70)and strong second-harmonic generation intensity.These performances are among the best reported for chiral halides.Our research not only sheds new light on the investigation of magneto-chiroptical phenomena,but also marks a significant advancement in realizing high-sensitivity circularly polarized light detection within the realm of lead-free polar materials.展开更多
基金supported by the Guangxi Natural Science Foundation(Nos.2025GXNSFDA069038)the Special Fund for Science and Technology Development of Guangxi(No.AD25069078)+4 种基金the Guangxi Natural Science Foundation(No.AA23073018)the National Natural Science Foundation of China(Nos.22175043 and 52162021)the Open Foundation of State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures(No.MMCS2023OF05)the Innovation Project of Guangxi Graduate Education(No.YCBZ2025046)the Innovation Project of Guangxi Graduate Education(No.YCSW2025092).
文摘Chiral organic-inorganic hybrid halides show significant potential for applications in circularly polarized photodetection,chiral-induced spin selectivity effects(CISS),and nonlinear optics.However,the widespread use of toxic lead element poses environmental concerns,hindering the further applications.Herein,we synthesized a zero-dimensional(0D)lead-free chiral antimony-based halide(R/S-MBA)_(4)Sb_(2)Br_(10)with the coexistence of polarity and crystallographic chirality.The halides exhibit unique magneto-chiroptical effects due to the field-effect-induced fine-tuning of exciton energy,which is the first observation in chiral antimony-based halides.Furthermore,owing to its significant spontaneous polarization(5.0μC/cm^(2))and optical chirality(g_(CD)=0.0018),(R/S-MBA)_(4)Sb_(2)Br_(10)halide exhibits excellent performance in self-powered circularly polarized photodetection,nonlinear optics,and CISS effects.The self-powered photodetector demonstrates high sensitivity with distinguishable factors(g_(res)=0.53/-0.51@0 V)and broad spectral response.The single crystal(R/S-MBA)_(4)Sb_(2)Br_(10)also exhibits a high second-harmonic polarization response asymmetry factor(g_(SHG-CD)=0.98/-0.70)and strong second-harmonic generation intensity.These performances are among the best reported for chiral halides.Our research not only sheds new light on the investigation of magneto-chiroptical phenomena,but also marks a significant advancement in realizing high-sensitivity circularly polarized light detection within the realm of lead-free polar materials.
