Energy transfer from colloidal nanocrystals to strongly absorbing perovskites

Integration of colloidal nanocrystal quantum dots (NQDs) with strongly absorbing semiconductors offers the possibility of developing optoelectronic and photonic devices with new functionalities. We examine the process of energy transfer (ET) from photoactive CdSe/ZnS core/shell NQDs into lead-halide...

Full description

Saved in:
Bibliographic Details
Published in:Nanoscale 2017-07, Vol.9 (25), p.8695-8702
Main Authors: Cabrera, Yasiel, Rupich, Sara M, Shaw, Ryan, Anand, Benoy, de Anda Villa, Manuel, Rahman, Rezwanur, Dangerfield, Aaron, Gartstein, Yuri N, Malko, Anton V, Chabal, Yves J
Format: Article
Language:English
Subjects:
Absorption
Colloids
Energy transfer
Nanocrystals
Nanostructure
Optoelectronic devices
Perovskites
Semiconductors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Integration of colloidal nanocrystal quantum dots (NQDs) with strongly absorbing semiconductors offers the possibility of developing optoelectronic and photonic devices with new functionalities. We examine the process of energy transfer (ET) from photoactive CdSe/ZnS core/shell NQDs into lead-halide perovskite polycrystalline films as a function of distance from the perovskite surface using time-resolved photoluminescence (TRPL) spectroscopy. We demonstrate near-field electromagnetic coupling between vastly dissimilar excitation in two materials that can reach an efficiency of 99% at room temperature. Our experimental results, combined with electrodynamics modeling, reveal the leading role of non-radiative ET at close distances, augmented by the waveguide emission coupling and light reabsorption at separations >10 nm. These results open the way to combining materials with different dimensionalities to achieve novel nanoscale architectures with improved photovoltaic and light emitting functionalities.
ISSN:2040-3364
2040-3372
DOI:10.1039/c7nr02234d