Graphene–TiO2 for scattering layer in photoanodes of dye-sensitized solar cell

Autor:	Tung-Lung Wu, Ming-Ta Yu, Chi-Ting Ho, Pin-Ru Chen, Kao-Wei Min, Shi-Mian Chao
Rok vydání:	2021
Předmět:	Materials science Scattering business.industry Graphene Doping Statistical and Nonlinear Physics engineering.material Condensed Matter Physics law.invention Dye-sensitized solar cell Coating law engineering Optoelectronics business Layer (electronics)
Zdroj:	Modern Physics Letters B. 35
ISSN:	1793-6640 0217-9849
DOI:	10.1142/s0217984921410050
Popis:	The scattering layer in the TiO2 photoanode (PAs) of dye-sensitized solar cells (DSSCs) is doped with single-layer graphene (G), and DSSC is prepared by doctor blade coating method. A small amount of graphene (0.0016 wt.%) in a graphene aqueous solution (G-AS) and a G-TiO2 paste was prepared to make 2–20 wt.% of G-AS in the deionized water (DIW). The UV-Vis measurement results show that the TiO2 scattering layers doped with graphene effectively improve the visible light absorption intensity of DSSC PAs and increase the current density (Jsc) from 13.84 mA/cm2 to 16.20 mA/cm2. The Electrochemical Impedance Spectroscopy (EIS) measurement showed that the internal structural impedance Rk [Formula: see text] decreased from 12.086 [Formula: see text] (without graphene doping) to 9.875 [Formula: see text] at 5 wt.% of the graphene doping. The photoelectric conversion efficiency (PCE) increased from 6.56% of the original un-doped graphene to the maximum PCE value of 7.57% at 5 wt.%. The results show that the best PCE is obtained when the concentration of G-AS is 5 wt.%.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a3a4c8d09cbe0fdcdedc6975e74f1d7f https://doi.org/10.1142/s0217984921410050 Zobrazit plný text záznamu