Dye-sensitized solar cells using ethynyl-linked porphyrin trimers

Autor:	Jotaro Nakazaki, Koichi Tamaki, Takaya Kubo, Joanne Ting Dy, Tomofumi Hamamura, Hiroshi Segawa, Satoshi Uchida
Rok vydání:	2014
Předmět:	Dye-sensitized solar cell chemistry.chemical_compound Wavelength Cell fabrication chemistry Tio2 nanoparticles General Physics and Astronomy Trimer Physical and Theoretical Chemistry Absorption (electromagnetic radiation) Photochemistry Porphyrin Photoelectric conversion efficiency
Zdroj:	Physical Chemistry Chemical Physics. 16:4551
ISSN:	1463-9084 1463-9076
DOI:	10.1039/c3cp55184a
Popis:	Toward the extension of the light-harvesting region of sensitizers in dye-sensitized solar cells (DSSCs), two ethynyl-linked porphyrin trimers were synthesized and investigated. The zinc–freebase–zinc trimer (Zn–FbA–Zn) showed an absorption maximum at a longer wavelength than the all-zinc trimer (Zn–ZnA–Zn), although the energy level of Zn–FbA–Zn was lower than that of Zn–ZnA–Zn. The DSSCs using these trimers showed spectral sensitivities up to 900 nm. Reflecting the energy levels of these trimers, the DSSC using Zn–ZnA–Zn showed better performance than that using Zn–FbA–Zn. After the optimization of cell fabrication conditions, the photoelectric conversion efficiency η of the DSSC using Zn–ZnA–Zn reached 3.17%. The larger TiO2 nanoparticles (ca. 37 nm) than the conventional cases (ca. 13 nm) were found to be preferable in this case, due to high molar extinction coefficients of the porphyrin trimers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac7a7322dc2dfd5b6a1acb31c091e19d https://doi.org/10.1039/c3cp55184a Zobrazit plný text záznamu