WANG Jiancheng (1993-), male, Doctoral candidate. E-mail: 13262690238@163.com
ZnS:Mn nanocrystals embedded glass has attracted much attention due to the excellent luminescence performance in reddish orange range, high stability and non-toxicity. However, high temperature and long annealing time needed in a conventional melt-quenching method readily cause the volatilization, invalidation and agglomeration of nanocrystals, greatly reducing the luminescence performance. In this paper, ZnS∶Mn nanocrystals embedded glass was prepared via spark plasma sintering (SPS) at 980℃ for 10 min, and the samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, electron spin resonance, photoluminescence and fluorescence lifetime analysis. The results show that rapidly sintering at a low temperature is beneficial to avoiding the oxidation of Mn2+ and driving Mn2+ into the ZnS lattice to realize the effective doping. Also, the generation of defect-related luminescence is suppressed by regulating the composition of ZnS nanocrystals, thereby further enhancing the Mn2+ transition luminescence. The ion-doped nanocrystals embedded glass prepared by SPS with the superior performance can be used as a promising solid light convertor in high-power LED devices.
| 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 |