Issue 42, 2023

Improving the stability of photodoped metal oxide nanocrystals with electron donating graphene quantum dots

Abstract

Doped metal oxide nanocrystals are emerging as versatile multi-functional materials with the potential to address several limitations of the current light-driven energy storage technology thanks to their unique ability to accumulate a large number of free electrons upon UV light exposure. The combination of these nanocrystals with a properly designed hole collector could lead to steady-state electron and hole accumulation, thus disclosing the possibility for light-driven energy storage in a single set of nanomaterials. In this framework, it is important to understand the role of the hole collector during UV light exposure. Here we show, via optical absorbance measurements under UV light, that well-defined graphene quantum dots with electron-donating character can act as hole acceptors and improve the stability of the photo-generated electrons in Sn-doped In2O3 nanocrystals. The results of this study offer new insight into the implementation of photo-charged storage devices based on hybrid organic/inorganic nanostructures.

Graphical abstract: Improving the stability of photodoped metal oxide nanocrystals with electron donating graphene quantum dots

Supplementary files

Article information

Article type
Paper
Submitted
19 7月 2023
Accepted
26 9月 2023
First published
30 9月 2023
This article is Open Access
Creative Commons BY license

Nanoscale, 2023,15, 17138-17146

Improving the stability of photodoped metal oxide nanocrystals with electron donating graphene quantum dots

A. Camellini, L. Rebecchi, A. Rubino, W. Niu, S. W. Kim, J. Ma, X. Feng and I. Kriegel, Nanoscale, 2023, 15, 17138 DOI: 10.1039/D3NR03534D

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