Electronic structure engineering of lanthanide activated materials
This Highlight article by Pieter Dorenbos reviews new approaches to design novel lanthanide-based materials. He discusses methods and models to construct electron binding energy schemes which can be used to predict the properties, and therefore engineer, new materials.
J. Mater. Chem., 2012, DOI: 10.1039/C2JM34252A, Advance Article
Phosphor-converted LEDs that use a combination of blue InGaN chip and a yellow emitting Y3Al5O12:Ce3+ phosphors have low color rendering indices and high correlated color temperatures which are disadvantageous. In this hot paper, Huang, Chen and co-workers, synthesis a series of single-composition Ca4Si2O7F2:Eu2+,Mn2+ phosphors and investigate their crystal structures and luminescence properties. They find that the phosphors generate white-light and are emission-tunable by using a sensitizer Eu3+. The critical distance between Eu2+ and Mn2+ is investigated in relation to the energy transfer mechanism. The phosphor has potential uses as a phosphor-converted white-light near-UV LED.
J. Mater. Chem., 2012, DOI: 10.1039/C2JM33160H, Advance Article
High rate performance of a Na3V2(PO4)3/C cathode prepared by pyro-synthesis for sodium-ion batteries
In this hot paper, Jaekook Kim’s group at Chonam National University, Korea report the synthesis of a Na-ion cathode as a high performing alternative to the Li-ion cathodes currently popular in the field. The carbon-coated Na3V2(PO4)3 cathode is synthesised via a polyol-assisted pyro-synthetic reaction which reduces the sintering time and temperature. The resulting nanoparticles showed greatly improved electrochemical performances in a Na-ion cell.
J. Mater. Chem., 2012, 22, 20857-20860
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