Optical responses of multiple excitons in semiconductor nanomaterials
| Project/Area Number |
25247052
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
IHARA Toshiyuki 京都大学, 化学研究所, 助教 (10619860)
OKANO Makoto 京都大学, 化学研究所, 助教 (10612525)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥43,940,000 (Direct Cost: ¥33,800,000、Indirect Cost: ¥10,140,000)
Fiscal Year 2015: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
Fiscal Year 2014: ¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000)
Fiscal Year 2013: ¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
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| Keywords | 光物性 / ナノ材料 / マルチエキシトン / エキシトン / 荷電励起子 / カーボンナノチューブ / ヘテロ構造ナノ粒子 / 量子ドット / ナノ粒子 / ナノロッド |
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| Outline of Final Research Achievements |
We studied the optical properties of functional semiconductor nanomaterials such as carbon nanotubes, hetero-structured nanoparticles, and closed-packed nanoparticle films. By developing and applying techniques based on microscopy and pump-probe spectroscopy, we clarified the optical phenomena associated with multiple excitons, carriers, and their combinations. The mechanisms of Auger recombination, multiple exciton generation, and luminescence blinking were discussed based on the recombination dynamics of biexcitons and charged excitons. We elucidated that the dynamics of multiple excitons and carriers are strongly influenced by the structure of the nanomaterial.
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Report
(4 results)
Research Products
(98 results)
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[Journal Article] Biexciton state causes photoluminescence fluctuations in CdSe/ZnS core/shell quantum dots at high photoexcitation densities2013
Author(s)
N. Yoshikawa, H. Hirori, H. Watanabe, T. Aoki, T. Ihara, R. Kusuda, C. Wolpert, T. K. Fujiwara, A. Kusumi, Y. Kanemitsu, and K. Tanaka
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Journal Title
Physical Review B
Volume: Vol.88
Issue: 15
DOI
Related Report
Peer Reviewed
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[Presentation] ナノ物質と光科学2014
Author(s)
金光義彦
Organizer
第7 回次世代先端光科学研究会
Place of Presentation
京都大学（宇治市）
Year and Date
2014-07-28
Related Report
Invited
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