Issue 84, 2022

Sub-bandgap trap sites for high-density photochemical electron storage in colloidal SrTiO3 nanocrystals

Abstract

We report facile and reversible electron storage in colloidal SrTiO3 nanocrystals using photochemical and redox titration methods. A very high electron storage capacity (∼180 e per 7 nm nanocrystal) is achieved which we attribute to the localized nature of added electrons at sub-bandgap trap sites in these colloidal SrTiO3 nanocrystals. The rate of electron accumulation is also found to be much faster with ethylene glycol as the sacrificial reductant compared to ethanol. This work provides key insight and establishes a kinetic bottleneck in the charge trapping processes.

Graphical abstract: Sub-bandgap trap sites for high-density photochemical electron storage in colloidal SrTiO3 nanocrystals

Supplementary files

Article information

Article type
Communication
Submitted
02 8月 2022
Accepted
27 9月 2022
First published
27 9月 2022

Chem. Commun., 2022,58, 11835-11838

Author version available

Sub-bandgap trap sites for high-density photochemical electron storage in colloidal SrTiO3 nanocrystals

M. Abdullah, R. J. Nelson and K. R. Kittilstved, Chem. Commun., 2022, 58, 11835 DOI: 10.1039/D2CC04328A

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