Study of blue electroluminescence from titania nanotubes doped into a polymericmatrix.

The blue electroluminescence from titania nanotubes doped into poly(2-methoxy-5-(2-ethylhexyloxy)-p-phenylene vinylene) (MEH-PPV) was studied. The results of absorption andphotoluminescence demonstrated that the observed blue electroluminescence in thenanocomposites comes directly from band-to-band transitions of titania nanotubes. Therelative intensity of the blue electroluminescence was enhanced by increasing the content oftitania nanotubes. Moreover, polymer light-emitting diodes doped with titania nanotubesshowed higher carrier transport ability and lower onset voltages. Electroluminescence fromone-dimensional materials has potential applications in nanoscale electrical andoptoelectronic devices. [ABSTRACT FROM AUTHOR]