Broadband near-infrared phosphor LiTi(PO):Cr realized multi-site occupation.

Near-infrared phosphor-converted light-emitting diodes (NIR pc-led) have wide applications in fields of biological imaging and food detection. However, developing an efficient, inexpensive, and broadband near-infrared fluorescent phosphor with sufficient spectral coverage remains a huge challenge. Herein, we report the synthesis of a series of broadband near-infrared phosphors, LiTi(PO):Cr (LTP), and analyze their crystal structure, luminescent properties, and thermal quenching mechanism.

Accurately Controlling the Occupation of Eu in Cs(K, Na)(LiSiO) to Achieve Narrow-Band Green Emission for Wide Color Gamut Displays.

The development of narrow-band phosphors for wide color gamut displays in multimodal phosphors through selective site occupancy engineering is an important challenge. In this work, by replacing Na ions with K ions in the cyan-green double-band emitting phosphor CsKNa(LiSiO): 10%Eu, the occupation of Eu in Cs(K, Na)(LiSiO) was accurately controlled from occupying three sites of Cs, K1, and Na to occupying only one site of K2/Na. The obtained phosphor CsKNa(LiSiO): 10%Eu exhibits a single narrow-band green emission at 531 nm (the full width at half-maximum of 46 nm) with excellent thermal stability of luminescence from 80 to 523 K (96.

Experimental and Theoretical Studies of Ultrafine Pd-Based Biochar Catalyst for Dehydrogenation of Formic Acid and Application of In Situ Hydrogenation.

In this work, a novel "foaming" strategy uses sodium bicarbonate (NaHCO) and ammonium oxalate ((NH)CO) as the foaming agent, turning biomass-derived carboxymethyl cellulose (CMC) into N-doped porous carbon. Highly active palladium nanoparticles (Pd NPs) immobilized on nitrogen-doped porous carbon (Pd@MC(2)-P) are produced through a phosphate-mediation approach. The phosphoric acid (HPO) becomes the key to the synthesis of highly dispersed ultrafine Pd NPs on active Pd-cluster-edge (the edge of the Pd-cluster-100 and Pd-cluster-111 surfaces).

The design of dual-switch fluorescence intensity ratio thermometry with high sensitivity and thermochromism based on a combination strategy of intervalence charge transfer and up-conversion fluorescence thermal enhancement.

Currently, the temperature sensing performances of inorganic photoluminescence materials based on fluorescence intensity ratio technology have become a research hotspot in the optical thermometry field due to their non-contact sensing, fast response and high stability. However, several problems have obstructed the development of optical temperature sensing materials, including low sensitivity and narrow temperature measurement ranges. In view of the above dilemma, a new optical thermometer La2Mo3O12:Yb3+,Pr3+ designed based on the combination strategy of intervalence charge transfer and up-conversion fluorescence thermal enhancement was developed.

Trivalent Chromium Ions Doped Fluorides with Both Broad Emission Bandwidth and Excellent Luminescence Thermal Stability.

Recently, trivalent chromium ion doped phosphors have exhibited significant application potential in broadband near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs). However, developing an NIR phosphor with both broad emission bandwidth and excellent luminescence thermal stability is still a great challenge. Here, we demonstrate an NIR phosphor, ScF:Cr, which can fulfill both conditions simultaneously.

Adjusting the structure and luminescence properties of Sr Ba MgAl O :Eu phosphors by Sr:Ba ratio.

Europium ion (Eu )-doped phosphors exhibit adjustable photoluminescence due to the sensitivity of their luminescence to the local environment. It is of great significance to adjust the luminescence of Eu by changing their local environment in the host. In this work, we investigated the effect of strontium/barium (Sr:Ba) ratio on the structure and luminescence properties of Sr Ba MgAl O :Eu phosphors.