Auger Recombination Lifetime Scaling for Type I and Quasi-Type II Core/Shell Quantum Dots

The Journal of Physical Chemistry Letters
John P Philbin, Eran Rabani

Abstract

Having already achieved near-unity quantum yields, with promising properties for light-emitting diode, lasing, and charge separation applications, colloidal core/shell quantum dots have great technological potential. The shell thickness and band alignment of the shell and core materials are known to influence the efficiency of these devices. In many such applications, improving the efficiency requires a deep understanding of multiexcitonic states. Herein, we elucidate the shell thickness and band alignment dependencies of the biexciton Auger recombination lifetime for quasi-type II CdSe/CdS and type I CdSe/ZnS core/shell quantum dots. We find that the biexciton Auger recombination lifetime increases with the total nanocrystal volume for quasi-type II CdSe/CdS core/shell quantum dots and is independent of the shell thickness for type I CdSe/ZnS core/shell quantum dots. To perform these calculations and compute Auger recombination lifetimes, we developed a low-scaling approach based on the stochastic resolution of identity. The numerical approach provided a framework for studying the scaling of the biexciton Auger recombination lifetimes in terms of the shell thickness dependencies of the exciton radii, Coulomb couplings, and den...Continue Reading

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Nov 8, 2018·Nano Letters·John P Philbin, Eran Rabani

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Citations

Aug 11, 2020·The Journal of Chemical Physics·John P PhilbinEran Rabani
Jan 12, 2021·Chemical Reviews·Christopher Melnychuk, Philippe Guyot-Sionnest
Mar 27, 2021·Nature Communications·Burak GuzelturkAaron M Lindenberg
Jun 24, 2021·The Journal of Physical Chemistry Letters·Yang ChengHuaibin Shen
Dec 16, 2020·Nano Letters·Guoqing ZhouOleg V Prezhdo
Sep 16, 2021·The Journal of Physical Chemistry Letters·Yang Zhou, Marco Califano

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