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Issue 20, 2020
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A time-domain view of charge carriers in semiconductor nanocrystal solids

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Abstract

The movement of charge carriers within semiconductor nanocrystal solids is fundamental to the operation of nanocrystal devices, including solar cells, LEDs, lasers, photodetectors, and thermoelectric modules. In this perspective, we explain how recent advances in the measurement and simulation of charge carrier dynamics in nanocrystal solids have led to a more complete picture of mesoscale interactions. Specifically, we show how time-resolved optical spectroscopy and transient photocurrent techniques can be used to track both equilibrium and non-equilibrium dynamics in nanocrystal solids. We discuss the central role of energetic disorder, the impact of trap states, and how these critical parameters are influenced by chemical modification of the nanocrystal surface. Finally, we close with a forward-looking assessment of emerging nanocrystal systems, including anisotropic nanocrystals, such as nanoplatelets, and colloidal lead halide perovskites.

Graphical abstract: A time-domain view of charge carriers in semiconductor nanocrystal solids

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Article information


Submitted
22 Nov 2019
Accepted
29 Apr 2020
First published
07 May 2020

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2020,11, 5157-5167
Article type
Perspective

A time-domain view of charge carriers in semiconductor nanocrystal solids

W. Shcherbakov-Wu and W. A. Tisdale, Chem. Sci., 2020, 11, 5157
DOI: 10.1039/C9SC05925C

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