High Performance Polymers, 2nd Edition

1: CARBAZOLE POLYMERS 29

small amountof MEH-PPV [207]. The combination of

MEH-PPV as electron donor and poly(pyridopyrazine

vinylene) as electron acceptor shows under low-

intensity monochromatic light an open-circuit voltage

of 900 mV [208].

Nanocrystals of wide bandgap p-type semiconduc-

tors from CuAlO

2

and β-CuSCN have been synthe-

sized [209]. Both types of nanocrystals were dispersed

in PVK in dichloromethane solution. In this way, a

nanocrystals embedded polymeric matrix was formed.

The solution was finally cast by dip-coating. These

materials were investigated as solid hole-transporters

in dye-sensitized solar cells.

The exciton photodissociation, charge transport,

and the photovoltaicresponseof PVK/TiO

2

nanocom-

posites for solar-cell applications