Efficient near-infrared up-conversion photoluminescence in carbon nanotubes

被引：113

作者：

Akizuki, Naoto ^{[1
]}

Aota, Shun ^{[1
]}

Mouri, Shinichiro ^{[1
]}

Matsuda, Kazunari ^{[1
]}

Miyauchi, Yuhei ^{[1
,2
,3
]}

机构：

[1] Kyoto Univ, Inst Adv Energy, Uji, Kyoto 6110011, Japan

[2] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan

[3] Nagoya Univ, Grad Sch Sci, Chikusa Ku, Nagoya, Aichi 4648602, Japan

来源：

NATURE COMMUNICATIONS | 2015年 / 6卷

基金：

日本科学技术振兴机构; 日本学术振兴会;

关键词：

ELECTRONIC-STRUCTURE; EXCITON; NANOPARTICLES; FLUORESCENCE; MICE; STATES;

D O I：

10.1038/ncomms9920

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

070301 [无机化学]; 070403 [天体物理学]; 070507 [自然资源与国土空间规划学]; 090105 [作物生产系统与生态工程];

摘要：

Photoluminescence phenomena normally obey Stokes' law of luminescence according to which the emitted photon energy is typically lower than its excitation counterparts. Here we show that carbon nanotubes break this rule under one-photon excitation conditions. We found that the carbon nanotubes exhibit efficient near-infrared photoluminescence upon photoexcitation even at an energy lying 4100-200 meV below that of the emission at room temperature. This apparently anomalous phenomenon is attributed to efficient one-phonon-assisted up-conversion processes resulting from unique excited-state dynamics emerging in an individual carbon nanotube with accidentally or intentionally embedded localized states. These findings may open new doors for energy harvesting, optoelectronics and deep-tissue photoluminescence imaging in the near-infrared optical range.

引用

页数：6

共 48 条

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