Full
GUO Pingchun (1988-), male, Ph.D., Lecturer. E-mail: guopingchun@163.com
Outline
Hexagonal ZnO with different average particle sizes and crystallinities were synthesized via pyrolysis of metal-organic framework-5 (MOF-5) at various temperatures. ZnO pastes were prepared, and then ZnO photoanodes were obtained by a doctor blade method, thus assembling into dye-sensitized solar cells (DSSC). The phase composition and morphology of MOF-5, ZnO nanoparticles, and ZnO photoanode were characterized by X-ray diffraction and scanning electronic microscopy, and the effects of ZnO nanoparticle morphology and photoanode thickness on the properties of DSSC were investigated. The average particle size and crystallinity of ZnO nanoparticles increase with increasing the calcination temperature for MOF-5. ZnO nanoparticles with a small particle size have a great specific surface area, and the prepared photoanode has a large amount of dye adsorption, which is conducive to obtaining DSSC with a high photoelectric conversion efficiency. However, the crystallinity is low as ZnO nanoparticles are rather small, thus decreasing the efficiency of DSSC. The optimum efficiency of DSSC is obtained at the average size of ZnO nanoparticles of 65.5 nm. The optimum efficiency of DSSC is 3.86% at the optimal thickness of photoanode of 48 μm.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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