Currently,lanthanide-doped metal halide perovskites with near-infrared(NIR)luminescence are receiving considerable attention.However,they suffer from low NIR efficiency,particularly in the NIR-Ⅱemission range,and are...Currently,lanthanide-doped metal halide perovskites with near-infrared(NIR)luminescence are receiving considerable attention.However,they suffer from low NIR efficiency,particularly in the NIR-Ⅱemission range,and are primarily excited by high-energy ultraviolet light.In this work,high-performance NIR-Ⅰand-Ⅱemissions were realized by co-doping a Cs_(2)NaInCl_(6)lattice with Tm^(3+)ions as luminescent emitters and Sb^(3+)and Te^(4+)ions as sensitizer ions,where Sb^(3+)ions can enable short-wavelength high-energy excitation and Te^(4+)ions can enable long-wavelength blue-light excitation.The NIR photoluminescence quantum yield(PLQY)reaches an unprecedented 58.0%in Cs_(2)NaInCl_(6):Sb^(3+)/Tm^(3+)(NIR-Ⅱemission:1224 nm-48.9%),which is attributed to the presence of the 1G4 energy level of the Tm^(3+)ion acting as a bridge,efficiently transferring energy from high-energy states of Sb^(3+)to NIR-emissive states.Moreover,Tm^(3+)ions can be sensitized by Te^(4+)ions that have broadband absorption in the blue region,which enable a high NIR PLQY of 10.3%in Cs_(2)NaInCl_(6):Te^(4+)/Tm^(3+)under 420 nm excitation.The excellent NIR luminescence performance combined with excellent environmental stability endows Cs_(2)NaInCl_(6):Sb^(3+)/Tm^(3+)and Cs_(2)NaInCl_(6):Te^(4+)/Tm^(3+)with considerable potential for application in nightvision devices.展开更多
基金supported by the University Key Laboratory of Guangdong(2024KSYS021)Universities Special Project in Key Fields of Guangdong(no.2022ZDZX3027)+2 种基金Natural Science Foundation of Guangdong Province(no.2022A1515010813)University Engineering Technology Center of Guangdong(no.2022GCZX007)Inorganic Optical Functional Materials and Application Innovation Team of Guangdong(no.2023KCXTD033).
文摘Currently,lanthanide-doped metal halide perovskites with near-infrared(NIR)luminescence are receiving considerable attention.However,they suffer from low NIR efficiency,particularly in the NIR-Ⅱemission range,and are primarily excited by high-energy ultraviolet light.In this work,high-performance NIR-Ⅰand-Ⅱemissions were realized by co-doping a Cs_(2)NaInCl_(6)lattice with Tm^(3+)ions as luminescent emitters and Sb^(3+)and Te^(4+)ions as sensitizer ions,where Sb^(3+)ions can enable short-wavelength high-energy excitation and Te^(4+)ions can enable long-wavelength blue-light excitation.The NIR photoluminescence quantum yield(PLQY)reaches an unprecedented 58.0%in Cs_(2)NaInCl_(6):Sb^(3+)/Tm^(3+)(NIR-Ⅱemission:1224 nm-48.9%),which is attributed to the presence of the 1G4 energy level of the Tm^(3+)ion acting as a bridge,efficiently transferring energy from high-energy states of Sb^(3+)to NIR-emissive states.Moreover,Tm^(3+)ions can be sensitized by Te^(4+)ions that have broadband absorption in the blue region,which enable a high NIR PLQY of 10.3%in Cs_(2)NaInCl_(6):Te^(4+)/Tm^(3+)under 420 nm excitation.The excellent NIR luminescence performance combined with excellent environmental stability endows Cs_(2)NaInCl_(6):Sb^(3+)/Tm^(3+)and Cs_(2)NaInCl_(6):Te^(4+)/Tm^(3+)with considerable potential for application in nightvision devices.
