Synthesis And Study On Photovoltaic Properties Of The Polymeric Metal Complexes Containing Carbazolevinylene Or Phenylenevinylene

As everyone knows, it is clear that access to economically viable renewable energy sourcesis essential for the development of a globally sustainable society. The mean global energyconsumption rate was13TW in the year2000. Assuming a kind of “business-as-usual”scenario with rather optimistic but reasonable assumptions of population growth and energyconsumption, the projection is28TW in2050for the global energy demand. Solar energy,besides fusion, has the largest potential to satisfy the future global need for renewable energysources.Dye-sensitized solar cells (DSSC) have become one of the most promising renewable andclean energy sources with the potential to be an alternative of fossil energy. The dye-sensitizer(dye) which bears the most important function of absorbing sunlight to generate and transferelectrons is the most crucial component in affecting the photovoltaic performance ofdye-sensitized solar cells. We have synthesized a series of new polymeric metal complexesdyes with excellent light absorption performance, high stability and low cost. The details areas follows:1. In part one, four novel D-π-A polymeric metal complex as dye sensitizers fordye-sensitized solar cell, which have Poly(p–phenylenevinylene)(PPV) or carbazole (CZ)derivative used as an electron donor (D), thiophene derivatives used as π-bridge(π) and2-(2’-pyridyl)benzimidazole derivative used as an electron acceptor(A), were synthesized andcharacterized. They have been determined and studied by FT-IR, TGA, DSC, GPC, Elementalanalysis, UV–vis absorption spectroscopy, photoluminescence spectroscopy, cyclicvoltammetry, J-V curves and IPCE plots. The results shown that four novel polymeric metalcomplex exhibited good photovoltaic property and thermal stability. The DSSC fabricated byP1, P2, P3and P4exhibit good device performance with a power conversion efficiency of upto2.15%,2.27%,2.30%and2.41%(under simulated AM1.5G irradiation) respectively.2. In part two, four novel D-π-A polymeric metal complex as dye sensitizers for DSSC,which have alkoxy benzene or carbazole (CZ) derivative used as an electron donor (D), C=Cused as π-bridge(π) and the8-hydroxyquinoline derivative was used as the electronacceptor(A), were synthesized and characterized. Bipyridine derivatives were ancillaryligands as well as providing anchoring groups. They have been determined and studied byFT-IR, GPC, TGA, DSC, UV–vis absorption spectroscopy, Elemental analysis,photoluminescence spectroscopy, cyclic voltammetry, J-V curves and IPCE plots. The resultsshow that four novel polymeric metal complex exhibited good thermal stability andphotovoltaic property. The DSSC fabricated by P5, P6, P7and P8exhibit good deviceperformance with a power conversion efficiency(PCE) of up to1.83%,2.25%,1.88%and 2.42%(under AM1.5G solar irradiation), respectively.The results showed that the polymeric metal complexes is promising in the development ofDSSC.