Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 133, Issue 1, Pages 317-323Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2012.01.030
Keywords
Semiconductors; Polymers; Atomic force microscopy (AFM); Photoluminescence spectroscopy
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Funding
- Council of Scientific and Industrial research
- Department of Science and Technology, New Delhi
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Nanosized TiO2 has been synthesized solvothermally using an autoclave. X-ray diffraction and electron microscopy studies elucidate that the synthesized nanoparticles are strongly crystalline and are dominantly in anatase phase. UV-vis and photoluminescence (PL) spectroscopy studies show a blue shift phenomenon in the synthesized nanoparticle in contrast to the bulk anatase TiO2 which furnish evidence in support of quantum size effect. The nanocomposites of TiO2 and MEH-CN-PPV have been prepared and characterized structurally (AFM, TEM) and optically (absorbance and photoluminescence). The nanocomposites have been used in light emitting diodes and electroluminescence (EL) and current density (J-V) of the device has been evaluated. The enhanced EL at elevated voltages for MEH-CN-PPV:5% TiO2 hybrid device suggests influence of the reduced particle size and modified surface morphology. (C) 2012 Elsevier B.V. All rights reserved.
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