Enhanced photovoltaic performance of dye-sensitized solar cells (DSSCs) using graphdiyne-doped TiO2 photoanode
- 406 Downloads
As a novel two-dimensional material consisting of sp- and sp2-hybridized carbon atoms, graphdiyne (GD) shows great potentials in the field of electric and material science. In particular, the performance is reported to be significantly improved for GD-involved optoelectronic devices due to its excellent electronic properties. Herein, to facilitate the charge transfer process and further improve the photo-to-electricity conversion efficiency (PCE) for dye-sensitized solar cells (DSSCs), for the first time we introduced GD in the TiO2(P25)-based photoanodes of DSSCs, resulting in GD-doped TiO2 photoanodes. It was shown that the overall performance of the GD-doped cell is significantly enhanced due to the higher dye adsorption amount, faster electron transfer and lower recombination, compared to that of the undoped DSSC. Furthermore, the optimum GD doping amount (weight percent, wt%) was determined. Thus, the DSSC involving P25-0.6 wt% GD photoanode achieved the best PCE of 8.03%, which increased by 26.5% comparing with that of pure P25 film-based cell.
The work is supported by National Natural Science Foundation of China (No. 21761132007) and China International Science and Technology Project (No. 2016YFE0114900).
- 15.Lin T, Wang JZ (2018) Applications of graphdiyne on optoelectronic devices. ACS Appl Mater Interfaces. https://doi.org/10.1021/acsami.8b02671
- 24.Lv JX, Zhang ZM, Wang J, Lu XL, Zhang W, Lu TB (2018) In situ synthesis of CdS/graphdiyne heterojunction for enhanced photocatalytic activity of hydrogen production. ACS Appl Mater Interfaces. https://doi.org/10.1021/acsami.8b03326
- 28.Li JS, Zhao M, Zhao CJ, Jian HM, Wang N, Yao LL, Huang CS, Zhao YJ, Jiu TG (2018) Graphdiyne-doped P3CT-K as an efficient hole-transport layer for MAPbI3 perovskite solar cells. ACS Appl Mater Interfaces. https://doi.org/10.1021/acsami.8b02611