Based on the need of sensitizer and electrolyte in dye sensitized solar cells (DSSC), two series of bifunctional polymeric photovoltaic materials containing sensitizer and hole-transporting group were designed and synthesized.

It demonstrated that introducing hole-transporting group on the phthalocyanine ring,the electron density on the metal is increased.

The most widely used hole transporting material, N,N -bis (1-naphthyl)-N, N -diphenyl-1, 1 -biphenyl-4, 4 -diamine (NPB), has a glass transition temperature ( Tg) of 95℃, which is much lower than that of the electron transporting material, tris (8-hydroxyq.

OCTMs include organic hole transport materials (OHTMs), organic electron transport materials (OETMs), and organic hole /electron transport materials (OHETMs).

We have fabricated the organic light-emitting devices(OLEDs)by introducing the electron transmission material aluminium-tris-8-hydroxy-quinoline(Alq3)into hole transport layer N,N\'-diphenyl-N,N\'-bis-1-naphthyl-(1,1\'-biphenyl)-4,4\'-diamine(NPB),whose doped concentration affects both color and efficiency of the devices.

In the experiments NPB is adopted as hole transport layer 4,4′-dis(2,2′diphenylvinyl)-1,1′-biphenyl(DPVBi) is an excellent blue dye for OLEDs.

With poly(N-vinylcarbazole)(PVK)layer used as hole transport layer(HTL),influence of thickness of PVK layer on indium tin oxide(ITO)/PVK/tris-(8-hydroxyquinoline)aluminum(Alq_3)/Mg∶Ag/Al double-layer(DL)device s performance was investigated.

Using a spinning polymer layer of poly(N-vinylcarbazole)(PVK) as hole transport layer(HTL) and an evaporated layer of tris(8-hydroxy)quinoline aluminum(Alq_3) as electron transport layer and emission layer,the organic light-emitting diodes(OLEDs) with the structure of ITO/PVK/Alq_3/Mg∶Ag/Al have been fabricated.