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

Assaf Aharoni, Dan Oron, Uri Banin, Eran Rabani, Joshua Jortner

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number057404
JournalPhysical Review Letters
Volume100
Issue number5
DOIs
StatePublished - 6 Feb 2008

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