A novel deep red phosphor Ca14Ga10−mAlmZn6O35:Dy3+,Mn4+(CGAZO:Dy3+,Mn4+) for plant growth LED lighting was successfully synthesizedviahigh-temperature solid-state reaction method and an effective energy transfer from Dy3+to Mn4+in the CGAZO host had been verified.
Currently, phosphor-converted LED (pc-LEDs) are revolutionizing the industry of plant growth lighting. To meet the requirements of this technology, phosphors with tunable photoluminescence, high thermal stability and quantum efficiency are required. Herein, we found that the simple substitution of yttrium for lanthanum in La2MgTiO6:Mn4+ system could satisfy above three criteria simultaneously. The photoluminescence properties can be regulated by continuously controlling the chemical composition of La2-xYxMgTiO6:Mn4+ solid solution. The La sites are occupied by Y ions, causing a significant blue shift in the emission spectra which owing to the change of local crystal field strengthen. Meanwhile, the thermal stability and decay lifetimes are also varied due to the variation of band gap energy. Besides, luminous intensity, thermal stability and internal quantum efficiency (IQE) increased by 201.8%, 26%, and 23%, respectively. The electronic luminescence (EL) of pc-LED devices using La2-xYxMgTiO6:Mn4+ red phosphor is evaluated, which matching the absorption regions of plant pigments well, reflecting the superiority of the studied phosphors in plant growth lighting areas.
significance for the overall reduction of CVD mortality. 7 This calls for biomarkers of CAD in clinical practice.MicroRNAs (miRNAs) are small non-coding molecules that play an important role in development of atherosclerosis and their expression altered during CAD events. 8,9 In 2008, Lawrie et al first reported the presence of miRNAs in biological fluids, which triggered an upsurge in research C ardiovascular disease (CVD) is one of the most important public health issues in the world. 1 Data from World Health Organization indicates that approximately 17.5 million people died from CVDs in 2012 (7.4 million caused by coronary artery disease (CAD)), which accounts for 31% of all global deaths. 2 Among CVDs, CAD remains the leading cause of mortality worldwide. [3][4][5] In Asia, there is an increasing CAD burden because of rising prevalence of sedentary lifestyle and changes in food consumption. 6 Early prevention of CAD is of clinical Editorial p 1062
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