排序方式: 共有7条查询结果,搜索用时 15 毫秒
1
1.
Electronic structures of halogen-doped Cu20 based on DFT calculationsElectronic structures of halogen-doped Cu20 based on DFT calculationsElectronic structures of halogen-doped Cu20 based on DFT calculations 下载免费PDF全文
In order to construct p-n homojunction of Cu20-based thin film solar cells that may increase its conversion efficiency, to synthesize n-type Cu20 with high conductivity is extremely crucial, and considered as a challenge in the near future. The doping effects of halogen on electronic structure of Cu20 have been investigated by density function theory calculations in the present work. Halogen dopants form donor levels below the bottom of conduction band through gaining or losing electrons, suggesting that halogen doping could make Cu20 have n-type conductivity. The lattice distortion, the impurity formation energy, the position, and the band width of donor level of Cu201-xHx (H = F, C1, Br, I) increase with the halogen atomic number. Based on the calculated results, chlorine doping is an effective n-type dopant for Cu20, owing to the lower impurity formation energy and suitable donor level. 相似文献
2.
We synthesize continuous solid solutions with monophasic zircon-type structure of vanadates of formula YxBi0.95 VO4:0.05Dy^3+ (x = 0-0.95) using a combined method of co-precipitation and hydrothermal synthesis. The X-ray diffractometer patterns confirm the formation of a solid solution of YBi0.95-xVO4:0.05Dy^3+, and the results show that all the samples have monophasic zircon-type structure. The absorption spectra of the prepared phosphors show a blue-shift of the fundamental absorption band edge with increasing Y^3+ content. An intense tunable characteristic emission of Dy^3+ is observed with the increasing ratio of Y/Bi. Finally, the mechanism of luminescence of Dya+ in the YBi0.95 VO4:0.05Dya+ (x = 0-0.95) solid solution is analyzed and discussed. 相似文献
3.
4.
We synthesize continuous solid solutions with monophasic zircon-type structure of vanadates of formula YxBi0.95-xVO4:0.05Dy3+(x = 0–0.95) using a combined method of co-precipitation and hydrothermal synthesis. The X-ray diffractometer patterns confirm the formation of a solid solution of YxBi0.95-xVO4:0.05Dy3+, and the results show that all the samples have monophasic zircon-type structure. The absorption spectra of the prepared phosphors show a blue-shift of the fundamental absorption band edge with increasing Y3+ content. An intense tunable characteristic emission of Dy3+ is observed with the increasing ratio of Y/Bi. Finally, the mechanism of luminescence of Dy3+ in the Y3xBi0.95-xVO4:0.05Dy+(x = 0–0.95) solid solution is analyzed and discussed. 相似文献
5.
6.
Preparation and characterization of nanosized GdxBi0.95-xVO4:0.05Eu3+ solid solution as red phosphor 下载免费PDF全文
A complete solid solutions with monophasic zircon-type structure of vanadates of formula GdxBio.95-xVO4:0.05Eu3+ (x = 04).95) are synthesized by combined method of co-precipitation and hydrothermal synthesis. Their microstructures and morphologies are characterized by X-ray powder diffraction and transmission electronic microscope, and the results show that each of all the samples has a monophasic zircon-type structure. The absorption spectrum of the prepared phosphor shows a blue-shift of the fundamental absorption band edge with increasing the gadolinium content. Under UV-light and visible-light excitation, all the prepared phosphors show the typical luminescence properties of Eu3+ in the zircon-type structure. The emission intensity of GdxBi0.95-xVO4:0.05Eu3+ (x = 0.55) is strongest in all samples under UV-light and visible-light excitations. Finally, the mechanisms of luminescence of Eu3+ in the GdxBi0.95-xVO4:0.05Eu3+ (x = 0-0.95) solid solutions are analyzed and discussed. 相似文献
7.
In order to construct p–n homojunction of Cu2O-based thin film solar cells that may increase its conversion efficiency, to synthesize n-type Cu2O with high conductivity is extremely crucial, and considered as a challenge in the near future. The doping effects of halogen on electronic structure of Cu2O have been investigated by density function theory calculations in the present work. Halogen dopants form donor levels below the bottom of conduction band through gaining or losing electrons, suggesting that halogen doping could make Cu2O have n-type conductivity. The lattice distortion, the impurity formation energy, the position, and the band width of donor level of Cu2O1 xHx(H = F, Cl, Br, I) increase with the halogen atomic number. Based on the calculated results, chlorine doping is an effective n-type dopant for Cu2O, owing to the lower impurity formation energy and suitable donor level. 相似文献
1