Effect of Push-Pull Ruthenium Complex Adsorption Conformation on the Performance of Dye Sensitized Solar Cells

Journal of the Brazilian Chemical Society

article

Rosero, Wilmmer A. A.¹  Guimaraes, Robson R.¹  Matias, Tiago A.¹  Araki, Koiti¹ 

[1] Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo;Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP);Universidade Federal do ABC (UFABC)

关键词: ruthenium dye;    push-pull dye;    solar cells;    photoelectrochemistry;   

DOI  :  10.21577/0103-5053.20200077

学科分类：内科医学

来源: SciELO

【 摘 要 】

A new series of tris-(bipyridyl)ruthenium-like complexes based on the 4-tripheylamine-2,2’:6’,2’’-terpyridine (TPA) push-pull ligand was prepared by incorporation of 4-carboxypyridine (cpy), 4,4’-dicarboxi-2,2’-bipyridine (dcbpy) and 4-carboxyterpyridine ligands (ctpy) ligands, in order to adsorb them on TiO 2 in different anchoring conformations. The electron photoinjection and electron recombination processes of the respective dye-sensitized solar cells were greatly influenced by the molecular structure, which defined the surface concentration and surface charge on TiO 2 , such that the photoconversion efficiency was 10 times larger for [Ru(py)(dcbpy)(TPAtpy)] than for the [Ru(cpy)(bpy)(TPAtpy)](PF 6 ) dye. Molecules anchoring in a more upright position and by a larger number of sites were shown to enhance the electron injection into TiO 2 conduction band (CB) improving the short-circuit current (J SC ), open circuit voltage (V oc ) and the overall photoconversion efficiency. However, a positive net charge in the dye increased the back electron-transfer reactions and induced a decrease in both V oc and conversion efficiency.

【 授权许可】

CC BY