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Authors: P. Geiregat, Y. Justo, S. Flamee, S. Abe, Z. Hens
Title: Giant and Broadband Absorption Enhancement in Colloidal Quantum Dot Monolayers through Dipolar Coupling
Format: International Journal
Publication date: 12/2012
Journal/Conference/Book: ACS Nano
Editor/Publisher: ACS, 
Volume(Issue): 7(2) p.987–993
DOI:
Download: Download this Publication (1.3MB) (1.3MB)

Abstract

The absorption cross section of colloidal quantum dots in close-packed monolayers shows a 4 (CdSe) to 5-fold (PbS) enhancement compared to quantum dots in a dilute dispersion. Quantitative agreement is demonstrated between the value and the size dependence of the enhancement and theoretical model predictions based on dipolar coupling between neighboring quantum dots. This collective optical behavior offers a new degree of freedom in the custom design of optical properties for electro-optical devices.


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