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Synthesized $TiO_{2}$ Mesoporous by Addition of Acetylacetone and Graphene for Dye Sensitized Solar Cells
| Content Provider | MDPI |
|---|---|
| Author | Chang, Chun-Hao Chuang, Chia-Han Zhong, De-Yang Lin, Jun-Cheng Sung, Chia-Chi Hsu, Chun-Yao |
| Copyright Year | 2021 |
| Description | This study mixed acetylacetone (Acac, 1, 2, and 3 mL) and graphene powder (GP, 0 wt.%, 0.001 wt.%, 0.003 wt.% and 0.005 wt.%) with $TiO_{2}$ mesoporous $(TiO_{2}$ powders: 20 g and particle size ~30 nm) to enhance the optoelectronic performances of dye sensitized solar cells (DSSC). Sponge-like structure $TiO_{2}$ mesoporous layers is a requirement for obtaining high efficiency DSSC, which ia synthesized by spin-coating techniques. The dense $TiO_{2}$ blocking layer (using peroxo-titanium complex) has a uniform, dense structure and completely adheres to the substrates to avoid charge recombination. The X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses of the $TiO_{2}$ films display the anatase type phase with preferred orientation along the (101) direction. After being ball milled, the $TiO_{2}$ mesoporous particle size almost remains unchanged. For mixing the Acac with $TiO_{2}$, the Raman intensity relatively increased, and the band gap energy (Eg) value decreased from 3.223 eV (for pure $TiO_{2}$) to 3.076 eV (for 2 mL Acac). Raman spectroscopy is used to evaluate the GP elements. It can be seen the intensity ratio $(I_{D}/I_{G}$) and $(I_{2D}/I_{G}$) was enhanced when the GP concentration increased. Using mixed Acac 2 mL and GP 0.003 wt.% with a $TiO_{2}$ mesoporous, led to increases in the open circuit voltage $(V_{OC}$), short circuit current density $(J_{SC}$) and fill factor (FF). If a fluorine-doped tin oxide is used instead of an indium tin oxide glass substrate, the photovoltaic efficiency of DSSC increases from 5.45% to 7.24%. |
| Starting Page | 796 |
| e-ISSN | 20796412 |
| DOI | 10.3390/coatings11070796 |
| Journal | Coatings |
| Issue Number | 7 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-07-01 |
| Access Restriction | Open |
| Subject Keyword | Coatings Electrochemistry Dssc Tio2 Mesoporous Band Gap Photovoltaic Efficiency |
| Content Type | Text |
| Resource Type | Article |
