Tsis ntev los no, pab pawg tshawb fawb coj los ntawm Tus Kws Tshawb Fawb Wu Kaifeng thiab Associate Researcher Cheng Pengfei los ntawm Photoelectronic Materials Dynamics Group (Pawg 1121) ntawm Chemical Kinetics Laboratory ntawm Dalian Institute of Chemical Physics, Suav Academy ntawm Kev Tshawb Fawb, tau ua tiav qhov kev kawm ntawm cov hlau halide dynamic luminesc. Lawv txoj haujlwm qhia txog kev tswj hwm cov txiaj ntsig ntawm doping ntawm tus cwj pwm ntawm lub voj voog polarized luminescence ntawm chiral hlau halides, ua tiav cov txiaj ntsig zoo ntawm lub voj voog polarized cyan emission thiab muaj txiaj ntsig zoo thib ob tiam hauv cov organic-inorganic hybrid silver-raws li halides.
Lub teeb ci ib puag ncig muaj cov ntaub ntawv kho qhov muag nplua nuj thiab tuav cov ntawv thov tseem ceeb hauv kev kos duab, kev paub, thiab photonics. Nyob rau hauv xyoo tas los no, chiral hlau halides nthuav tawm lub voj voog polarized emission tau txais txiaj ntsig zoo vim lawv cov nqi qis thiab kev daws teeb meem - qhov ua tau zoo. Txawm li cas los xij, chirality nyob rau hauv cov ntaub ntawv no feem ntau yog los ntawm chiral organic cations nkag mus rau hauv lawv cov qauv, uas txwv ntau yam txwv tsis pub muaj kev sib haum xeeb ntawm cov khoom muaj pes tsawg leeg. Tsis tas li ntawd, lub voj voog polarized emission ntawm tam sim no tau tshaj tawm chiral hlau halides feem ntau yog nyob rau hauv cheeb tsam ntsuab, txiv kab ntxwv, thiab liab, thaum xiav ncig polarized emissions - tseem ceeb heev rau siab - teeb pom kev zoo thiab kev sib txuas lus kho qhov muag - tseem tsis tau muaj.
Hauv kev ua haujlwm no, pab pawg tshawb fawb tau sib sau ua ke xoom-dimensional chiral silver halides los ntawm kev sib txuas ntawm achiral methyl-triphenylphosphine cations nrog daim duab peb sab nyiaj -iodine inorganic units. Los ntawm tooj liab ion doping, pab neeg no tsis tau tsuas yog txhim kho cov khoom siv luminescence efficiency tab sis kuj tau muab cov kev ua haujlwm ntawm lub voj voog polarized luminescence, yog li txuas ntxiv cov polarized emission nyob rau hauv cov hlau halides rau thaj tsam xiav. Spectroscopic characterization qhia tau hais tias tooj liab doping tsis tsuas zoo suppresses nonradiative recombination nyob rau hauv lub host matrix tab sis kuj qhia tshiab tooj liab -ssociated luminescent chaw. Txoj kev no ua tiav cov fluorescence quantum yield mus txog 100% thiab yields emission asymmetry yam ntawm 1.3 × 10⁻². Tsis tas li ntawd, qhov tseem ceeb tsis yog -centrosymmetric qauv ntawm qhov chiral system endows nws nrog polarization-rhiab thib ob harmonic teb thiab nthuav tawm qhov tseem ceeb thib ob harmonic ncig dichroism. Qhov kev ua haujlwm no nthuav tawm cov tswv yim kho qhov muag kho qhov muag rau cov hlau halides uas tsis tso siab rau chiral cations, muab txoj hauv kev tshiab rau kev tsim cov hlau halides nrog ob qho tib si ncig polarized luminescence kev ua haujlwm thiab cov lus teb uas tsis yog-linear optical.
Cov haujlwm no, hu ua "Cyan Cyan Circularly Polarized Luminescence thiab Efficient Second Harmonic Generation in Zero-Dimensional Silver-Based Halides with Achiral Cations," tsis ntev los no tau luam tawm hauv Angewandte Chemie International Edition. Cov co- thawj tus kws sau ntawv yog Wang Sijia, tus kws kho mob kawm tiav los ntawm peb lub koom haum, thiab Bai Tianxin, tus kws tshawb fawb tom qab kawm tiav hauv pab pawg 1121. Cov kev tshawb fawb no tau txhawb nqa los ntawm National Natural Science Foundation ntawm Tuam Tshoj, Suav Academy ntawm Kev Tshawb Fawb Qib B Pioneer Tshwj Xeeb Project "Kev Tshawb Fawb Txog Kev Tshawb Fawb Txog Kev Tshawb Fawb Txog Kev Tshawb Fawb Kev Tshawb Fawb Hauv Central," Fund, thiab lub koom haum Innovation Fund.
