The luminescence properties of transition metal d3 ions have exhibited widespread application potential in optical thermometry,while the emissive characteristics of self-trapped excitons in lead-free metal halides hav...The luminescence properties of transition metal d3 ions have exhibited widespread application potential in optical thermometry,while the emissive characteristics of self-trapped excitons in lead-free metal halides have garnered significant attention in the field of optoelectronics.Nonetheless,a comprehensive investigation into the temperature-dependent luminescence features of d3 ion-doped lead-free metal halides remains an area demanding in-depth exploration.Herein,we report on the visible and near-infrared(NIR)photoluminescence of 5d3 Re^(4+)doped vacancy-ordered metal halide Cs_(2)ZrCl_(6)synthesized via hydrothermal methods.The undoped Cs_(2)ZrCl_(6)host exhibits broad band self-trapped exciton(STE)emission.PL measurements reveal that its anti-thermal quenching PL under 270 nm excitation is predominantly due to the enhancement of the hot absorption band tail.Upon UV excitation,Re^(4+)doped Cs_(2)ZrCl_(6)concurrently emits STE emission and features a narrow-band NIR emission at 730 nm with vibronic sideband details from the ReCl_(6)^(2−)octahedra,alongside a narrow-band emission at 1340 nm.By harnessing the luminescence intensity ratio(LIR)technique,combined with the anti-thermal quenching of STEs and the thermal quenching of Re^(4+)emission,optical thermometry with a relative sensitivity as high as 2.76%K^(−1)is achieved.Our findings suggest that Re^(4+)-doped Cs_(2)ZrCl_(6)represents a multifunctional optoelectronic platform with promising applications in NIR illumination and temperature sensing.展开更多
基金supported by the National Natural Science Foundation of China(11904345 and 52072355)the Liu Zugang Expert Workstation of Yunnan Province under Grant No.202205AF150076.
文摘The luminescence properties of transition metal d3 ions have exhibited widespread application potential in optical thermometry,while the emissive characteristics of self-trapped excitons in lead-free metal halides have garnered significant attention in the field of optoelectronics.Nonetheless,a comprehensive investigation into the temperature-dependent luminescence features of d3 ion-doped lead-free metal halides remains an area demanding in-depth exploration.Herein,we report on the visible and near-infrared(NIR)photoluminescence of 5d3 Re^(4+)doped vacancy-ordered metal halide Cs_(2)ZrCl_(6)synthesized via hydrothermal methods.The undoped Cs_(2)ZrCl_(6)host exhibits broad band self-trapped exciton(STE)emission.PL measurements reveal that its anti-thermal quenching PL under 270 nm excitation is predominantly due to the enhancement of the hot absorption band tail.Upon UV excitation,Re^(4+)doped Cs_(2)ZrCl_(6)concurrently emits STE emission and features a narrow-band NIR emission at 730 nm with vibronic sideband details from the ReCl_(6)^(2−)octahedra,alongside a narrow-band emission at 1340 nm.By harnessing the luminescence intensity ratio(LIR)technique,combined with the anti-thermal quenching of STEs and the thermal quenching of Re^(4+)emission,optical thermometry with a relative sensitivity as high as 2.76%K^(−1)is achieved.Our findings suggest that Re^(4+)-doped Cs_(2)ZrCl_(6)represents a multifunctional optoelectronic platform with promising applications in NIR illumination and temperature sensing.
