2014 Fiscal Year Final Research Report
Study on the the optical blinking of InGaN materials by near-field optical microscope
| Project/Area Number |
24560014
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Applied materials science/Crystal engineering
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| Research Institution | Yokohama City University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 結晶評価 / 点滅現象 / 光物性 / 量子光工学 / 点滅発光 |
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| Outline of Final Research Achievements |
This project had the main goal to solve the enigma of optical blinking in LED and other devices. This phenomena is present in Indium Gallium Nitrides LEDs and its causes were unknown. We could approach the problem experimentally and with the development of theoretical models. In these three years we could clarify what is the real cause of the blinking. The blinking is caused by the interference of thermal vibrations in the crystal lattice that alters the frequencies of a small amount. In this way we observe the blinking phenomena because crystal lattice structure is proportional to luminosity. Also we verified with very advance analysis with ab-initio methods that absorbed impure gas materials on the surface of the device may be responsible for the blinking. Besides these investigations, we also did a purely experimental approach with low-temperature and vacuum microscopy analysis with different gas to elucidate the influence on blinking (research paper in preparation).
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| Free Research Field |
応用物理学・結晶工学
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