Light formation mechanisms induced by well-aligned sub-20-nm Ag quantum dots produced alongside patterned porous Si walls and bottoms
- Title
- Light formation mechanisms induced by well-aligned sub-20-nm Ag quantum dots produced alongside patterned porous Si walls and bottoms
- Author
- 김현우
- Keywords
- Sub-20-nm Ag nanoparticles; Si; Plasmonic effect
- Issue Date
- 2020-04
- Publisher
- ELSEVIER GMBH
- Citation
- OPTIK, v. 207, article no. 164480
- Abstract
- Sub-20-nm Ag nanoparticles created via sputtering were freely moved into preformed Si pores and were arranged along both wall and lower surfaces in etched Si layers via a post-thermal annealing treatment. The variously sized Ag quantum dots on the porous Si facilitate broadband visible emission via photo-generated enhanced luminescent effects, i.e., plasmonic effects of Ag nanoparticles by electron transfer from the Si-based matrix to the metallic Ag. The emission wavelengths and intensities, depending on the sizes of the Ag quantum dots, were determined by the degree of oxidation of the Si-based substrate such as Si, SiOx, and SiO2, according to different post-thermal annealing conditions. The morphological, microstructural, and optical evolution of Ag nanoparticles and Si pores were simply observed via side-cross-sectional scanning electron microscopy, X-ray diffraction, transmission electron microscopy, and crystalline-controlled photoluminescence analyses, respectively. The origin of a new systematic luminescence mechanism based on energy-equilibria is also presented.
- URI
- https://www.sciencedirect.com/science/article/pii/S0030402620303144?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/166112
- ISSN
- 0030-4026; 1618-1336
- DOI
- 10.1016/j.ijleo.2020.164480
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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