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Energy Transfer from Colloidal Nanocrystals to Strongly Absorbing Perovskites

Abstract

Integration of colloidal nanocrystal quantum dots (NQDs) with strongly absorbing semiconductors offers the possibility to develop 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 excitations in two materials that can reach efficiency of 99% at the 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.

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Publication details

The article was received on 29 Mar 2017, accepted on 17 May 2017 and first published on 18 May 2017


Article type: Paper
DOI: 10.1039/C7NR02234D
Citation: Nanoscale, 2017, Accepted Manuscript
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    Energy Transfer from Colloidal Nanocrystals to Strongly Absorbing Perovskites

    Y. Cabrera, S. Rupich, R. Shaw, B. Anand, M. De Anda Villa, R. Rahman, A. Dangerfield, Y. Gartstein, A. Malko and Y. J. Chabal, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR02234D

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