Observation of solvatochromism in CdSe colloidal quantum dots

被引：130

作者：

Leatherdale, CA

Bawendi, MG

机构：

[1] MIT, Dept Chem, Cambridge, MA 02139 USA

[2] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.63.165315

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report solvatochromatic shifts in the absorption spectra of colloidal CdSe quantum dots that are consistent with the change in polarization energy of the quantum-confined exciton. Good agreement with theory is found when the screening from the ligand shell is included. The polarization energy also accounts for the spectral shift between dilute dispersions and close-packed quantum dot solids. Experiments with pure and mixed-size quantum dot solids suggest that solvatochromism dominates the redshift observed with quantum dot (2-6-nm diameter) solids.

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页数：6

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