PhosphorNIR pc-LEDsRecently, Cr 3+ -activated near-infrared (NIR) phosphors have been widely explored and used in many fields because of the good photoluminescence (PL) properties. However, their luminous efficiency usually decreases obviously with increasing temperature, which is a major barrier to...
Deep Red Emitting MgAl2O4:Cr3+ Phosphor for Solid State LightingDeep Red Emitting MgAl2O4:Cr3+ Phosphor for Solid State LightingPhosphorMgAl2O4:Cr3+deep red-emissionco-precipitationIn this work, MgAl2O4:Cr phosphor has been synthesized by the co-precipitation approach coupled with heat treatment....
Figure 5.Schematic energy-level diagram and possible energy transfer paths of Mn4+and Cr3+in the KLGF: Mn4+, Cr3+phosphor. Figure 6.Driving-current-dependent emission spectra of a) NIR pc-LED1 and b) NIR pc-LED...
Cr3+掺杂的氧化物荧光粉的制备及光谱特性研究 摘要 摘要 在现代生产生活中，发光材料作为一种人类生产生活离不开的必需品，一 直受到研究人员的探索研究。如作为绿色照明光源的白光LED就因为其轻便易 携带、寿命周期长、发光效率高、易保存、低成本等优点而受到关注。所以优 秀的荧光粉材质是对这些应用方面有着巨大...
NEAR infrared radiationLUMINESCENCESCANNING electron microscopySPECTRUM analysisLUMINOSITYThe near-infrared (NIR) long persistent phosphors have gained considerable attention owing to the potential applications in in vivo imaging. A novel NIR long-persistent phosphors Zn3Al2Ge3O12:Cr3+......
X-ray diffraction pattern, Fourier transform-infrared spectrum, and electron paramagnetic resonance signal indicate that nanosized ZnGa 2O 4:Cr 3+ phosphor shows many defect-related energy states and heavy lattice distortion in comparison with bulk ZnGa 2O 4:Cr 3+ phosphor. Many defect states ...
Clearly, LiIn1.97SbO6: 0.03Cr3+ phosphor can be pumped by the most efficient InGaN blue light chips (460 nm), as verified from the emission spectrum monitored by the 492-nm excitation. It is worth noting that the phosphor also exhibits the similar NIR spectrum under 294-nm excitation (...
97.4% of the NIR emission at room temperature can be maintained. The fabricated NIR-LED device emits a high optical power of 109.9 mW at 520 mA. The performances of both the achieved phosphor and the NIR-LED are almost the best results until now. The mechanism for the optimization ...
The resulting NIR phosphor emits at 800 nm with a full-width half-peak maximum (FWHM) of 120 nm under 480 nm blue light excitation. Subsequently, Cr3+ was employed as a sensitizer, and Nd3+ was introduced to establish a Cr3+-Nd3+ energy transfer channel. The emission peaks of both Cr3...
The nanophosphor ZnGa2O4:Cr3+,Sn4+ formed in the mesopore after sintering. Good dispersity and morphology were performed with average diameters of 71±7?nm. It emitted light at 600–850?nm; the intensity was optimized by tuning the doping ratio of Cr3+ and Sn4+. Meanwhile, the light ...