Search results

1

Energy Band and Absorption Coefficient of Quantum Dots in a Well Structure

100%

Zhang P., Lu X., Zhang C., Yao J.

Acta Physica Polonica A

|

2012

|

vol. 122

|

issue 1

197-201

EN

Building on the effective-mass envelope function theory, this paper focuses on the study of the energy band and the absorption coefficient of InAs/In_{x}Ga_{1 - x}As quantum dots in a well (DWELL) structure. In contrast to InAs/In_{0.15}Ga_{0.85}As quantum DWELL, the InAs/In_{0.2}Ga_{0.8}As quantum DWELL has lower ground states. With the thickness of In_{0.15}Ga_{0.85}As layer changing from 7 nm to 9 nm and In_{0.2}Ga_{0.8}As layer changing from 9 nm to 12 nm, the calculation shows that their absorption coefficient spectra takes a red shift in the long-wave infrared and far-infrared ranges, respectively. Moreover, when the thickness of the In_{x}Ga_{1 - x}As layer is defined as 9 nm, the absorption coefficient spectra of InAs/In_{0.2}Ga_{0.8}As DWELL shows a obvious red shift comparing with that of InAs/In_{0.15}Ga_{0.85}As DWELL.

2

Optical Prosperities of Ag-ZnO Composition Nanofilm Synthesized by Chemical Bath Deposition

100%

Wang Y., Yao J., Jia G., Lei H.

Acta Physica Polonica A

|

2011

|

vol. 119

|

issue 3

451-454

EN

Ag-ZnO composite thin films were prepared on glass substrates by chemical bath deposition at lower temperature. The samples were characterized by X-ray diffraction, scanning electron microscopy, photoluminescence and the optical transmission spectra. The morphology analysis showed that Ag nanoparticles were not deposited on the ZnO nanorods surface but on the glass substrate. The influence of the reaction time on the size and density of Ag nanoparticles was studied, the results showed that the reaction time played an important role in determining of the optical characteristics. There were two obvious photoluminescence peaks located at about 395 nm and 471 nm, respectively. The blue emission centered at 471 nm can be ascribed to the electron transition from Zn_{i} to V_{Zn}.

3

Solution Growth of Well-Aligned ZnO Nanorods on Sapphire Substrate

76%

Jia G., Hao B., Lu X., Wang X., Li Y., Yao J.

Acta Physica Polonica A

|

2013

|

vol. 124

|

issue 1

74-77

EN

Vertically well-aligned ZnO nanorods arrays were synthesized on sapphire substrates by chemical bath deposition. Those sapphire substrates were seeded to control the density and orientation of ZnO nanorods using sol-gel method. Well-aligned and uniformly distributed ZnO nanorods in a large scale were obtained with strongly (002) preferential orientation. The structural properties were characterized by X-ray diffraction spectrometer and morphological characteristics were analyzed by scanning electron microscopy, respectively. The ZnO nanorods are obvious hexangular wurtzite structure and preferentially oriented along the c-axis (002) and growth vertically to the substrates. The optical properties were further thoroughly studied. What is more, the influences of the strain between substrate and ZnO nanorods due to thickness of the ZnO seed-layer on the characteristics and optical properties of ZnO were also analyzed.

Refine search results

3 Acta Physica Polonica A

1 2013

1 2012

1 2011

3 Yao J.

2 Jia G.

2 Lu X.

1 Hao B.

1 Lei H.

1 Li Y.

1 Wang X.

1 Wang Y.

1 Zhang C.

1 Zhang P.

Energy Band and Absorption Coefficient of Quantum Dots in a Well Structure

Optical Prosperities of Ag-ZnO Composition Nanofilm Synthesized by Chemical Bath Deposition

Solution Growth of Well-Aligned ZnO Nanorods on Sapphire Substrate