Solid-state lithium metal batteries(SSLMBs)have gained much interest owing to their advantages of high specific energy density and safety performance.Nevertheless,the low ionic conductivity of the solid electrolyte an...Solid-state lithium metal batteries(SSLMBs)have gained much interest owing to their advantages of high specific energy density and safety performance.Nevertheless,the low ionic conductivity of the solid electrolyte and poor contact between lithium metal and electrolyte have hindered their widespread application.展开更多
The exploration of high-performance near-infrared phosphors has attracted widespread attention.In this work,a brand new Rb2LiAlF6:Cr^(3+)(denoted as RLAF:Cr)phosphor has been constructed by the substitution of Al^(3+)...The exploration of high-performance near-infrared phosphors has attracted widespread attention.In this work,a brand new Rb2LiAlF6:Cr^(3+)(denoted as RLAF:Cr)phosphor has been constructed by the substitution of Al^(3+)ions with Cr^(3+)ions.Evidence shows that two sets of near-infrared emission bands,which originated from two types of Cr^(3+)sites,were observed upon blue light excitation.These emission bands merged into a wide emission band locating in the region of 650 nm-1050 nm,with a full width at half maximum(FWHM)of 125 nm.In addition,a high quantum efficiency of 77.7%and an excellent thermal stability at 417 K,with a retention rate of 90.5% of that at room temperature(RT),were witnessed.Profiting from the luminescence properties of the NIR phosphor,clear images of biological tissues and human palm veins were obtained using a light-emitting diode(LED)as a lighting source,which was constructed using an RLAF:Cr phosphor and a blue InGaN chip.These images showed the large potential of the RLAF:Cr phosphor for night vision and bioimaging in LED devices.展开更多
基金the financial support of the National Key R&D Program of China(No.2023YFE0115800)the National Natural Science Foundation of China(No.51672029,51372271 and 51172275).
文摘Solid-state lithium metal batteries(SSLMBs)have gained much interest owing to their advantages of high specific energy density and safety performance.Nevertheless,the low ionic conductivity of the solid electrolyte and poor contact between lithium metal and electrolyte have hindered their widespread application.
基金supported by the National Natural Science Foundation of China(grant nos.22365034,22065039,52272174 and U22A20135)the Yunnan Fundamental Research Projects(202101AT070072).
文摘The exploration of high-performance near-infrared phosphors has attracted widespread attention.In this work,a brand new Rb2LiAlF6:Cr^(3+)(denoted as RLAF:Cr)phosphor has been constructed by the substitution of Al^(3+)ions with Cr^(3+)ions.Evidence shows that two sets of near-infrared emission bands,which originated from two types of Cr^(3+)sites,were observed upon blue light excitation.These emission bands merged into a wide emission band locating in the region of 650 nm-1050 nm,with a full width at half maximum(FWHM)of 125 nm.In addition,a high quantum efficiency of 77.7%and an excellent thermal stability at 417 K,with a retention rate of 90.5% of that at room temperature(RT),were witnessed.Profiting from the luminescence properties of the NIR phosphor,clear images of biological tissues and human palm veins were obtained using a light-emitting diode(LED)as a lighting source,which was constructed using an RLAF:Cr phosphor and a blue InGaN chip.These images showed the large potential of the RLAF:Cr phosphor for night vision and bioimaging in LED devices.
