Issue 12, 2022

Sensitizing phosphorescent and radical emitters via triplet energy translation from CsPbBr3 nanocrystals

Abstract

Colloidal semiconductor nanocrystals can effectively sensitize surface-attached molecular species via triplet energy transfer. These sensitized molecular triplets are capable of triggering a variety of subsequent processes such as triplet-fusion upconversion, singlet oxygen generation and organic synthesis. Here we demonstrate that molecular triplets can also sensitize non-conventional light-emitting materials such as phosphorescent and radical molecules. Specifically, photoexcitation of CsPbBr3 perovskite nanocrystals resulted in triplet sensitization of naphthalene ligands, which further translated the energy into 2,3,7,8,12,13,17,18-octaethyl-21H,23H-porphine platinum(II) or (4-(4′-triphenylamine-yl)-tetrachlorophenyl)bis-(pentachlorophenyl)-methyl in the bulk solution that can efficiently emit photons. As a result, the light absorption of phosphorescent and radical molecules is strongly enhanced and photon emission is effectively down-shifted from absorption. This new energy transduction scheme may prove useful in devices such as luminescent solar concentrators.

Graphical abstract: Sensitizing phosphorescent and radical emitters via triplet energy translation from CsPbBr3 nanocrystals

Supplementary files

Article information

Article type
Paper
Submitted
30 Aug 2021
Accepted
16 Oct 2021
First published
18 Oct 2021

J. Mater. Chem. C, 2022,10, 4697-4704

Sensitizing phosphorescent and radical emitters via triplet energy translation from CsPbBr3 nanocrystals

Z. Chen, G. Liang and K. Wu, J. Mater. Chem. C, 2022, 10, 4697 DOI: 10.1039/D1TC04086C

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