Direct Comparison of Electron Transport and Recombination Behaviors of Dye-Sensitized Solar Cells Prepared Using Different Sintering Processes
- Title
- Direct Comparison of Electron Transport and Recombination Behaviors of Dye-Sensitized Solar Cells Prepared Using Different Sintering Processes
- Author
- 고민재
- Keywords
- Flexible dye-sensitized solar cell; Electron transport and recombination; Hot compression; High-temperature sintering; Impedance; Photocurrent-voltage transient technique
- Issue Date
- 2018-05
- Publisher
- AMER CHEMICAL SOC
- Citation
- ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v. 6, no. 5, page. 7193-7198
- Abstract
- Flexible dye-sensitized solar cells on plastic substrates have achieved a conversion efficiency of 8.6% with the hot compression technique (<150 degrees C). However, the value of efficiency is only 70% of that achieved using glass substrates with high-temperature sintering technique (500 degrees C). Investigating the origin of this difference is a critical step for further improving the performance of plastic dye-sensitized solar cells. In this study, an optimized ternary viscous titania paste without the addition of organic binders enables the fabrication of efficient dye-sensitized solar cells with a low-temperature process. Therefore, the electron-transport behavior of dye-sensitized solar cells can be directly compared with those prepared with the high-temperature sintering technique. In addition to the structural and optical differences, the hot compressed photoanode of dye-sensitized solar cells have an electron diffusion coefficient that is 2 times smaller and a recombination time that is 6 times shorter than those of the high-temperature sintered cells, suggesting inadequate interparticle connections and more recombination events. These results indicate that electron transport and recombination are still the key factors governing the performance of low-temperature fabricated dye-sensitized solar cells. Eventually, the flexible cell with an efficiency of 6.81% has been achieved on flexible indium tin oxide/polyethylene naphthalate substrate. Further improvements in advanced low-temperature processing or novel materials with minimized defect or grain boundaries are required.
- URI
- https://pubs.acs.org/doi/10.1021/acssuschemeng.8b01351https://repository.hanyang.ac.kr/handle/20.500.11754/118705
- ISSN
- 2168-0485
- DOI
- 10.1021/acssuschemeng.8b01351
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML