The Synthesis And Characterization Of Aromatic Amines Photosensitive Dye Of Solar Cells

Dye-sensitized solar cells(DSSC) attracted widespread attention for its low cost, easi1 y to manufacture, large-scale production and environmental1 y friendly features. Sensitizer is a core component of the DSSC which plays a role in collecting sunlight and injecting excited state electron into the conduction band of the semiconductor, and is crucial to the photoelectric conversion efficiency. Dyes can be divided into metal complex dyes and pure organic dyes. This paper mainly relates to triphenylamine dyes and carbazole dyes, designing and synthesizing three metal ruthenium complex dyes(RL1-RL3) and two pure organic dyes(RL4 and RL6).The performance of ruthenium complex dyes is stable and excellent. The three metal ruthenium complex dyes of the paper introducting triphenylamine and carbazole groups to auxiliary ligands of dyes, and its larger conjugate plane is beneficial for absorption of visible light. The unilateral asymmetric structure of ancillary ligands will help to improve the solubility of the ruthenium complex dyes, and may ease the accumulation on the film surface of TiO2. The structure of three ruthenium complex dyes and their intermediates were characterized by IR, 1H NMR and MS, the results show that their structure is correct. UV test results show that the three dyes have good light absorbing capability ability. Electrochemical test results show that the HOMO and LUMO energy levels of the three dyes reach electric potential requirements of DSSC. The photoelectric conversion efficiency of DSSC assembled by the three dyes were 4.58%, 4.57% and 5.31%.In recent years, the pure organic dye has been a great development. The reason is that its molecule structure is easy to design and purify. In this paper, the classic D-π-A type structure of dye was to be improved and two pure organic sensitizer dyes bearing D-A-π-A structure were synthesized. The carbazole with a chain of hexane was introduced to be as electronic donating group. Benzothiadiazole as an additional electron withdrawing group was introduced to the dyes because of its strong electron withdrawing group. Thiophene or 3, 4-ethylene dioxythiophene(EDOT) are used to be as π bridge, and the classic cyano acetic was introduced to dyes as adsorption group and an another electron acceptor. The structural identification of RL4 and RL6 and their intermediates were by IR and 1H NMR, the results show that their structure is correct. UV spectra shows the introduction of EDOT of RL6 allows absorption spectrum redshift. Electrochemical test results show that the HOMO and LUMO energy levels of RL4 and RL6 reach electric potential requirements of DSSC.