Synthesis And Study On The Photovoltaic Properties Of Polymeric Metal Complexes Containing Diaminomaleonitrile

It’s well known that with the fossil fuels are inevitably vanishing and have constantlybrought about negative effects on climate, environment and human health. PM2.5constantlyburst table, we have to seek new energy，especially clean energy. As a renewable, low-costgreen energy, solar energy has become our preferred choice. As one of the solar cells，due tothe environmental protection, low-cost, the dye-sensitized solar cells get a more special favor.At present, the research and application of solar cells are beginning to enter the thirdgeneration. The ifrst generation is crystalline silicon solar cells，the second generation solarcells，for example, amorphous silicon，CIGS，and CdTe，are based on thin iflm technologies.Dye-sensitized solar cells (DSSCs)，also called as Gratzel cells，was invented by Gratzel and0’Regan in1991. There are many advantages of dye-sensitized solar cells than theifrst-generation and second-generation solar cells; relatively small weight; low productioncost; short energy payback time; high light-to-electrical conversion efifciencies，and so forth.The key indicator to measure the performance of dye-sensitized solar cell is conversioneiffciency，the theoretical conversion efifciency could be achieve about20%，but themaximum efifciency of the current experimental study is just12%. There are a lot of factorsthat affect the conversion eiffciency of the solar cell，and the photosensitizer is one of themost critical parts in dye-sensitized solar cells，because it determines the light absorptionproperties, electron transport, and the composite performance. Therefore many scientists ofchemistry, physics, materials take much interest in the new high-performance dye sensitizers,and it has became the most favorite of worldwide research and development applications.In this study, we design and synthesis of a series of dye sensitizer of polymeric metalcomplexes containing diamino maleonitrile, the structure was characterized by nuclearmagnetic resonance spectroscopy, elemental analysis, and infrared spectroscopy; Study thethermal stability by TGA and DSC; Gel permeation chromatography testing MW; Ultravioletspectroscopy, fluorescence spectroscopy to test the performance of its absorbance; The cyclicvoltammetry test its electrochemical properties; Finally, test its photovoltaic performance.The highest energy conversion efifciency of Chapters III and IV of synthetic polymeric metalcomplexes was to2.07%and2.25%, respectively. The above photovoltaic test resultsindicates, under the joint efforts of the researchers, the polymeric metal complex dyes areexpected to become the next generation of solar cell materials.