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09.07.2010



Plasma displays from nanophosphors



08 July 2010



Korean chemists have developed a simple method to make plasma displays by spin-depositing layers of inorganic phosphor onto glass. 


Lanthanide orthophosphates (LaPO4) nanoparticles doped with cerium or terbium are well known for their intense green luminescence and have already found uses in various optical and labelling applications. However, the application of these phosphors in plasma displays has been limited owing to their tendency to exhibit substantial light scattering that limits the transparency of the films, as well as difficulties in film synthesis and stability. 


Heesun Yang from Hongik University, Seoul, and colleagues made high quality LaPO4:Ce,Tb nanophosphors using lanthanide nitrates and phosphoric acid along with citric acid and polyvinylpyrrolidone. After spin-depositing several layers of the phosphor onto glass, they found them to be very stable with negligible light scattering loss making them ideal for constructing highly efficient green emitting plasma display panels (PDPs). 'Unlike other conventional nanophosphor studies that typically focussed on their synthesis and characterization, our work provides the feasibility of transparent PDP device fabrication using nanophosphors,' comments Yang. 


Green plasma display









Layers of lanthanide nanophosphors create plasma display panels



Gautam Gundiah, an expert in inorganic phosphors and their applications from the Lawrence Berkeley National Laboratory, Berkeley, US, agrees, 'obtaining a transparent phosphor layer is key to the development of transparent plasma display panels (PDPs),' he says. 'While there have been reports on the fabrication of transparent PDPs by deposition of thin-film phosphors, this study demonstrates an elegant and scalable route to deposit nanophosphor layers and obtain mini PDPs with high quantum yield and excellent transparency despite multiple coatings.' 


The team are not stopping with green nanophosphors, as well as developing phosphors with better quantum yields, nanophosphors that emit other colours are the next target according to Yang. 


Catherine Bacon 


 


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Link to journal article



Formation of green-emitting LaPO4:Ce,Tb nanophosphor layer and its application to highly transparent plasma displays
Woo-Seuk Song, Hak-Nyun Choi, Yong-Seog Kim and Heesun Yang, J. Mater. Chem., 2010
DOI: 10.1039/c0jm00458h


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  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

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