Light-emitting conjugated polymers poly

As discussed in Section 10.2.3, PVP and DNA have been used to wrap and water-solublize SWNTs. For specific actuator, electrical and electro-optic applications, SWNTs have been wrapped by piezoelectric polyvinylidene fluoride and trifluor-oethylene copolymer [50] or with conjugated polymers [51, 52]. The conjugated polymer used to form a composite with MWNTs and an electron-transport layer in light-emitting diodes is poly(m-phenylene-vinylene-co-2,5-dioctyloxy-p-phenylene-vinylene) (PmPV) [53]. Wrapping coupled with electron doping has been achieved with polyethylene imine to form p-n junction devices ([40], see footnote 1). 

J. A. Osaheni and S. A. Jenekhe, A new light-emitting conjugated rigid rod polymer poly(benzobisthia-zole-l,4-phenylene vinylene). Macromolecules 26 4726(1993). 

J.D. Stenger-Smith, P. Zarras, L.H. Merwin, S.E. Shaheen, B. Kippelen, and N. Peyghambarian, Synthesis and characterization of poly(2,5-bis(A -methyl-/V-hexylamino)phcnylcnc vinylene), a conjugated polymer for light-emitting diodes, Macromolecules, 31 7566-7569, 1998. 

In this section, the basic features of light absorption and emission (luminescence) processes in conjugated systems are reviewed. The discussion will focus on poly(/>-phenylenevinylene), PPV, compounds, which provide typical examples of the physical phenomena to be highlighted in the context of polymer-based light emitting devices. 

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