The emission-tunable CaLa 2-x Eu x ZnO 5 phosphors were synthesized by citric sol-gel method. The products were characterized by X-ray diffractometer, scanning electron microscope, energy dispersive spectroscopy and photoluminescence spectrometer. Through adjusting the dopant concentration of Eu 3? in CaLa 2 ZnO 5 phosphor, blue-green to orange-red emission with the 467 nm excitation could be obtained, which matches well with the emission of blue LED chip. Luminescence properties of Ca 1-y Sr y La 1.9 Eu 0.1 ZnO 5 (0 B y B 1) indicated that increasing Sr 2? content enhances not only the emission intensity of 5 D 0 ? 7 F 2 transition but also the emission intensity ratio of 5 D 0 ? 7 F 2 to 5 D 0 ? 7 F 1 (asymmetry ratio). The Ca 0.6 Sr 0.4 La 1.9 Eu 0.1 ZnO 5 phosphors possess optimal integrated emission intensity, which is 20 % higher than that of CaLa 1.9 Eu 0.1 ZnO 5 phosphors, and the Commission International de L'Eclairage chromaticity coordinate is (0.658, 0.341). Ca 1-y Sr y La 2-x Eu x ZnO 5 phosphors may have potential applications in field emission displays based on their particle size, low-cost synthetic route, and diverse luminescent properties.

The insufficient phase separation between polymer donors and non-fullerene acceptors (NFAs) featuring with low-structural orders disrupts efficient charge transport and increases charge recombination, consequently limits the maximum achievable power conversion efficiency (PCE) of organic solar cells (OSCs). Herein, an NFA IT-M has been added as the third component into the PBDB-T:m-INPOIC OSCs, and is shown to effectively tune the phase separation between donor and acceptor molecules, although all components in the ternary system exhibit low degrees of structural orders. The incorporation of 10 wt% IT-M into a PBDB-T:m-INPOIC binary host blend appreciably increases the length scale of phase separation, creating continuous pathways which increase and balance charge transport. This leads to an enhanced photovoltaic performance from 12.8% in the binary cell to 13.9% for the ternary cell with simultaneously improved open-circuit voltage, short-circuit current and fill factor. This work highlights the beneficial role of ternary components in controlling the morphology of the active layer for high performance OSCs.

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To achieve impedance matching for microwave absorption, multi-component powder absorbers have attractive aspects. However, conventional designs require mixing the absorber with an adhesive to coat the protected device, resulting in the risk of the coating peeling, and limiting the potential applications of the absorber and expansion of the production scale. Hence, developing a high-performance absorber with an easy fabrication method and low cost is a significant goal. In this paper, a series of Ni@Ni 2 S 3 foams of varied Ni/S ratios were synthesized by a one-step in situ hydrothermal reaction. The foams of different composition had different morphologies that were investigated by x-ray diffraction, x-ray photoelectron spectroscopy, and scanning electron microscopy. The results reveal that Ni@Ni 2 S 3 foam possesses a wide, effective attenuation bandwidth (< −10 dB reflection loss (RL) from 12.75 to 18.0 GHz)) and an intense RL (−50.7 dB) as an electromagnetic (EM) wave absorber for a thickness of 3.6 mm. In addition, compared to powder absorbers, Ni@Ni 2 S 3 foam possesses unique advantages. With a simplified formation process, it is a promising multifunctional material, which in addition to protecting against EM wave pollution, can improve mechanical properties as a result of the metal skeleton it provides.