Long-range electronic-to-vibrational energy transfer from nanocrystals to their surrounding matrix environment

被引:57
|
作者
Aharoni, Assaf [1 ,2 ]
Oron, Dan [1 ,2 ]
Banin, Uri [1 ,2 ]
Rabani, Eran [3 ]
Jortner, Joshua [3 ]
机构
[1] Hebrew Univ Jerusalem, Ctr Nanosci & Nanotechnol, IL-91904 Jerusalem, Israel
[2] Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel
[3] Tel Aviv Univ, Sackler Fac Sci, Sch Chem, IL-69978 Tel Aviv, Israel
关键词
D O I
10.1103/PhysRevLett.100.057404
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A radiationless transition process of long-range, resonance interconversion of electronic-to-vibrational energy transfer (EVET) is discovered between the band-gap excitation of nanocrystal quantum dots to matrix vibrational overtone modes using fluorescence lifetime measurements. A theoretical analysis based on long-range dipole-dipole nonadiabatic couplings, being distinct from the traditional adiabatic or "static-coupling" pictures, is given and is in qualitative agreement with experiments. EVET should be considered in matrix choices for near-infrared optoelectronic applications of nanocrystals.
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页数:4
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