Carbazol-phenyl-phenothiazine-based sensitizers for dye-sensitized solar cells
| العنوان: | Carbazol-phenyl-phenothiazine-based sensitizers for dye-sensitized solar cells |
|---|---|
| المؤلفون: | Yunfei Jiao, Lukas Pfeifer, Michael Grätzel, Felix Eickemeyer, Dan Ren, Zhongjin Shen, Juan Song, Zhi Qiang Gao, Wei Huang, Xu Wenjuan, Ding Yongjie, Le Mao, Baoxiu Mi, Shuaishuai Liu, Shaik M. Zakeeruddin, Dapeng Cao |
| المصدر: | Journal of Materials Chemistry A. 9:26311-26322 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Photocurrent, Materials science, Renewable Energy, Sustainability and the Environment, General Chemistry, Molecular configuration, Photochemistry, Molecular engineering, Dye-sensitized solar cell, chemistry.chemical_compound, chemistry, Phenothiazine, Pyridine, Thiophene, Phenyl group, General Materials Science |
| الوصف: | Heteroaromatic units are commonly used as π-spacers for sensitizers in dye-sensitized solar cells (DSSCs). Here, we investigated the influence of the π-spacer on the photophysical properties, electrochemical properties and photovoltaic performance of carbazol-phenyl functionalized phenothiazine donor based organic dyes, i.e., CPPC-No (without a π-spacer), CPPC-Th (thiophene as the π-spacer), CPPC-Fu (furane as the π-spacer), CPPC-Ph (phenyl as the π-spacer) and CPPC-Py (pyridine as the π-spacer). The solar to electric power conversion efficiency (PCE) achieved with these dyes strongly depends on the type of π-spacer, increasing in the order of CPPC-Ph < No < Py < Th < Fu. The width of the absorption band and the photocurrent density increased with the electron richness of the π-spacer. Theoretical calculations indicated that the planar molecular configuration of CPPC-Fu promotes the intramolecular charge transfer process. As a result, the CPPC-Fu based device showed a PCE of 7.4% under one sunlight illumination. The dyes using thiophene and pyridine as π-spacers showed slightly lower performance, however, still significantly higher than the PCE achieved with the control compound lacking a π-spacer. By contrast, introducing a phenyl group as the π-spacer led to a decrease in device efficiency. These results give deeper insight into the effect of different π-spacers on DSSC performance, showing the importance of molecular engineering in developing high efficiency organic dyes. |
| تدمد: | 2050-7496 2050-7488 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::2f734a15594c9cb460659d631937fa0a https://doi.org/10.1039/d1ta08020b |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........2f734a15594c9cb460659d631937fa0a |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20507496 20507488 |
|---|