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Photoluminescence properties of heat-treated silicon-based polymers


Marketed By :  Südwestdeutscher Verlag für Hochschulschriften   Sold By :  Kamal Books International  
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  • Product Description

In the present work, a new approach to obtain homogeneous, thermally stable and formable photoluminescent materials for LED applications is presented, starting from silicon-based polymers and through heat-treatment at low temperatures (200-700 °C). These commercially available or laboratory synthesized polymers are usually employed in the PDC route and annealed at temperatures beyond 1000 °C. Here, polysiloxanes, polysilazanes, polysilylcarbodiimides and a copolymer polysilazane-polysilylcarbodiimide were heat-treated up to 700 °C for 2 h under Ar atmosphere. The annealing is effective in order to develop materials with tunable photoluminescence properties. The maximum emission spectra of many of the polymers investigated show a bathochromic shift as the annealing temperature increases, indicating the development of new luminescent centers with smaller band gap. Our studies have shown that the luminescence properties are related to structural rearrangements occurring during the polymer to ceramic transformation, namely crosslinking and formation of sp2 carbon.

Product Specifications
SKU :COC10686
AuthorIlaria Menapace
Number of Pages240
Publishing Year4/26/2010
Edition1 st
Book TypeChemical engineering
Country of ManufactureIndia
Product BrandSüdwestdeutscher Verlag für Hochschulschriften
Product Packaging InfoBox
In The Box1 Piece
Product First Available On ClickOnCare.com2015-07-23 00:00:00